Waste plastic-derived FWCNT-NiMgAl composite for supercapacitor application
Source abstract
Abstract
In this work, we report a direct preparation of a few-walled carbon nanotube (FWCNTs) and NiMgAl composites namely FWCNT-NiMgAl by pyrolysis of waste high-density polyethylene (HDPE) plastic at 800 °C with NiMgAl-layered double hydroxide (LDH) as catalysts. The composite formation is carried out in a single step using our lab-developed pyrolysis reactor. The NiMgAl-LDH catalyst was prepared by co-precipitation method and the FWCNTs were grown on the NiMgAl-LDH catalyst with FWCNT yield of 10% and FWCNT-NiMgAl composite yield of 55% whose quality is determined by Raman ID/IG ratio of 2.57. The average outer and inner diameter of the FWCNT are found to be 5.5 nm and 2.9 nm, respectively, from TEM and 2.92 nm from the outer RBM (radial breathing mode) band, which indicates the formation of a few-walled CNTs. FWCNT-NiMgAl is used for the fabrication of flexible supercapacitor electrodes on a polyethylene terephthalate (PET) sheet which achieved a specific capacitance of 432 Fg−1 in a wide potential range (ΔV = 2) at a scan rate of 5 mV s−1 in 2 M KOH electrolyte with a high energy density of 240 Wh kg−1, whereas NiMgAl displayed a capacitance of 200 Fg−1 with an energy density of 111 Wh kg−1. The diffusion-type charge storage mechanism (pseudocapacitance) is found to be dominant with contributions of 73.2% and 69.75% for NiMgAl and FWCNT-NiMgAl, respectively. The highest specific capacitance and energy density are obtained for NiMgAl in 2 M KCl and for FWCNT-NiMgAl in 2 M NaOH electrolytes. However, the largest potential window is observed in KOH electrolyte for both NiMgAl and FWCNT-NiMgAl with value of ΔV = 2 V. The electrode material shows good stability in acidic electrolytes and also shows good capacitive stability at high frequencies maintaining a phase angle of 70°. The present work is a novel approach to fabricate low-cost multifunctional carbon composite nanomaterials and will contribute to the research on low-cost waste-derived CNT composite preparation and its application in flexible energy storage devices. Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Conducting polymers and applications · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (99)
Show source-provided references
1. United Nations Report on Plastic Pollution, United Nations. http://www.unenvironment.org/interactive/beat-plastic-pollution. Accessed May 2022
2. Tudor VC, Mocuta DN, Teodorescu RF, Smedescu DI (2019) The issue of plastic and microplastic pollution in soil. Mater Plast 56:484–487. https://doi.org/10.37358/MP.19.3.521410.37358/MP.19.3.5214 ↗
3. Olivatto GP, Martins MCT, Montagner CC, Henry TB, Carreira RS (2018) Microplastic contamination in surface waters in Guanabara Gay, Rio de Janeiro, Brazil. Mar Pollut Bull 139:157–162. https://doi.org/10.1016/j.marpolbul.2018.12.04210.1016/j.marpolbul.2018.12.042 ↗
4. Verma R, Vinoda KS, Papireddy M, Gowda ANS (2016) Toxic pollutants from plastic waste-—a review. Proc Environ Sci 35:701–708. https://doi.org/10.1016/j.proenv.2016.07.06910.1016/j.proenv.2016.07.069 ↗
5. Zhuo C, Levendis YA (2014) Upcycling waste plastics into carbon nanomaterials: a review. J Appl Polym Sci 131:1–14. https://doi.org/10.1002/app.3993110.1002/app.39931 ↗
6. Farshbaf M, Davaran S, Rahimi F, Annabi N, Salehi R, Akbarzadeh A (2018) Carbon quantum dots: recent progress on synthesis, surface modification and applications. Artif Cells Nanomed Biotechnol 46:1331–1348. https://doi.org/10.1080/21691401.2017.137772510.1080/21691401.2017.1377725 ↗
7. Qian H, Greenhalgh ES, Shaffer MSP, Bismarck A (2010) Carbon nanotube-based hierarchical composites: a review. J Mater Chem 20:4751–4762. https://doi.org/10.1039/C000041H10.1039/C000041H ↗
8. Zaporotskova IV, Boroznina NP, Parkhomenko YN, Kozhitov LV (2016) Carbon nanotubes: sensor properties a review. Mod Electron Mater 2:95–105. https://doi.org/10.1016/j.moem.2017.02.00210.1016/j.moem.2017.02.002 ↗
9. Prasek J, Drbohlavova J, Chomoucka J, Hubalek J, Jasek O, Adam V, Kizek R (2011) Methods for carbon nanotubes synthesis—review. J Mater Chem 21:15872–15884. https://doi.org/10.1039/c1jm12254a10.1039/c1jm12254a ↗
10. Mirabootalebi SO, Akbari GH (2017) Methods for synthesis of carbon nanotubes—review. Int J Bio-Inorg Hybr Nanomater 6:49–57. https://ijbihn.iauvaramin.ac.ir/article_657304
11. Borsodi N, Szentes A, Miskolczi N, Wu C, Liu X (2016) Carbon nanotubes synthesized from gaseous products of waste polymer pyrolysis and their application. J Anal Appl Pyrolysis 120:304–313. https://doi.org/10.1016/j.jaap.2016.05.01810.1016/j.jaap.2016.05.018 ↗
12. Wang J, Shen B, Lan M, Kang D, Wu C (2020) Carbon nanotubes (CNTs) production from catalytic pyrolysis of waste plastics: the influence of catalyst and reaction pressure. Catal Today 351:50–57. https://doi.org/10.1016/j.cattod.2019.01.05810.1016/j.cattod.2019.01.058 ↗
13. Zhi M, Xiang C, Li J, Li M, Wu N (2013) Nanostructured carbon-metal oxide composite electrodes for supercapacitors: a review. Nanoscale 5:72–88. https://doi.org/10.1039/c2nr32040a10.1039/c2nr32040a ↗
14. Zheng Y, Zhang M, Gao P (2007) Preparation and electrochemical properties of multiwalled carbon nanotubes-nickel oxide porous composite for supercapacitors. Mater Res Bull 42:1740–1747. https://doi.org/10.1016/j.materresbull.2006.11.02210.1016/j.materresbull.2006.11.022 ↗
15. Wang B, Williams GR, Chang Z, Jiang M, Liu J, Lei X, Sun X (2014) Hierarchical NiAl layered double hydroxide/multiwalled carbon nanotube/nickel foam electrodes with excellent pseudocapacitive properties. ACS Appl Mater Interfaces 6:16304–16311. https://doi.org/10.1021/am504530e10.1021/am504530e ↗
16. Luo K, Zhang J, Chu W, Chen H (2020) Facile fabrication of nickel aluminum layered double hydroxide/carbon nanotube electrodes toward high-performance supercapacitors. ACS Omega 5:24693–24699. https://doi.org/10.1021/acsomega.0c0328310.1021/acsomega.0c03283 ↗
17. Li M, Liu F, Zhang XB, Cheng JP (2016) A comparative study of Ni-Mn layered double hydroxide/carbon composites with different morphologies for supercapacitors Phys. Chem Chem Phys 18:30068–30078. https://doi.org/10.1039/C6CP05119G10.1039/C6CP05119G ↗
18. Kariper IA, Korkmaz S, Karaman C, Karaman O (2022) High energy supercapacitors based on functionalized carbon nanotubes: effect of atomic oxygen doping via various radiation sources. Fuel 324:124497–124507. https://doi.org/10.1016/j.fuel.2022.12449710.1016/j.fuel.2022.124497 ↗
19. Korkmaz S, Kariper IA, Karaman O, Karaman C (2021) The production of rGO/RuO2 aerogel supercapacitor and analysis of its electrochemical performances ceramics international 47:34514–34520. https://doi.org/10.1016/j.ceramint.2021.08.36610.1016/j.ceramint.2021.08.366 ↗
20. Karaman C, Bayram E, Karaman O, Aktas Z (2020) Preparation of high surface area nitrogen doped graphene for the assessment of morphologic properties and nitrogen content impacts on supercapacitors. J Electroanal Chem 868:114197–114207. https://doi.org/10.1016/j.jelechem.2020.11419710.1016/j.jelechem.2020.114197 ↗
21. Qian C, Qi H, Gao B, Cheng Y, Qiu Q, Qin L, Zhou O, Liu J (2006) Fabrication of small diameter few-walled carbon nanotubes with enhanced field emission property. J Nanosci Nanotechnol 6:1346–1349. https://doi.org/10.1166/jnn.2006.14010.1166/jnn.2006.140 ↗
22. Hou Y, Tang J, Zhang H, Qian C, Feng Y, Liu J (2009) Functionalized few-walled carbon nanotubes for mechanical reinforcement of polymeric composites. ACS Nano 3:1057–1062. https://doi.org/10.1021/nn900051210.1021/nn9000512 ↗
23. Veksha A, Chen W, Liang L, Lisak G (2022) Converting polyolefin plastics into few-walled carbon nanotubes via a tandem catalytic process: importance of gas composition and system configuration. J Hazard Mater 435:128949. https://doi.org/10.1016/j.jhazmat.2022.12894910.1016/j.jhazmat.2022.128949 ↗
24. Chen WQ, Fu X, Veksha A, Lipik V, Lisak G (2022) Few-walled carbon nanotubes derived from shoe waste plastics: effect of feedstock composition on synthesis, properties and application as CO2 reduction electrodes. J Clean Prod 356:131868. https://doi.org/10.1016/j.jclepro.2022.13186810.1016/j.jclepro.2022.131868 ↗
25. Ghai V, Chatterjee K, Agnihotri PK (2021) Vertically aligned carbon nanotubes coated aluminium foil as flexible supercapacitor electrode for high power applications. Carbon Lett 31:473–481. https://doi.org/10.1007/s42823-020-00176-410.1007/s42823-020-00176-4 ↗
26. Kang CS, Ko Y-I, Fujisawa K, Yokokawa T, Kim JH, Han JH, Wee JH, Kim YA, Muramatsu H, Hayashi T (2020) Hybridized double walled carbon nanotubes and activated carbon. Carbon Lett 30:527–534. https://doi.org/10.1007/s42823-020-00122-410.1007/s42823-020-00122-4 ↗
27. Kaushal I, Sharma AK, Saharan P, Kumar V, Duhan S (2019) Facile synthesis and electrochemical investigations of tin-doped MnO2/carbon nanotube composites. Carbon Lett 29:69–79. https://doi.org/10.1007/s42823-019-00009-z10.1007/s42823-019-00009-z ↗
28. Raza I, Hussain M, Khan AN, Katzwinkel T, Feldhusen J (2021) Properties of light weight multi walled carbon nano tubes (MWCNTs) nano-composites. Int J Lightweight Mater Manuf 4:195–202. https://doi.org/10.1016/j.ijlmm.2020.09.00310.1016/j.ijlmm.2020.09.003 ↗
29. Karimi-Maleh H, Karaman C, Karaman O, Karimi F, Vasseghian Y, Fu L, Baghayeri M, Rouhi J, Kumar PS, Show P-L, Rajendran S, Sanati AL, Mirabi A (2022) Nanochemistry approach for the fabrication of Fe and N co-decorated biomass-derived activated carbon frameworks: a promising oxygen reduction reaction electrocatalyst in neutral media. J Nanostruct Chem 12:429–439. https://doi.org/10.1007/s40097-022-00492-310.1007/s40097-022-00492-3 ↗
30. Mehmandoust M, Erk N, Karaman O, Karimi F, Bijad M, Karaman C (2021) Three-dimensional porous reduced graphene oxide decorated with carbon quantum dots and platinum nanoparticles for highly selective determination of azo dye compound tartrazine. Food Chem Toxicol 158:112698. https://doi.org/10.1016/j.fct.2021.11269810.1016/j.fct.2021.112698 ↗
31. Nath A, Shah A, Singh LR, Mahato M (2021) Waste plastic-derived NiO-MWCNT composite as visible light photocatalyst for degradation of methylene blue dye. Nanotechnol Environ Eng 6:1–14. https://doi.org/10.1007/s41204-021-00163-810.1007/s41204-021-00163-8 ↗
32. Senapati S, Shah A, Mahato PPK (2021) Measurement of elastic modulus of CNT composites: a nondestructive study. Fullerenes Nanotubes Carbon Nanostruct 30:290–296. https://doi.org/10.1080/1536383X.2021.193650610.1080/1536383X.2021.1936506 ↗
33. Tlili O, Mansilla C, Frimat D, Perez Y (2019) Hydrogen market penetration feasibility assessment: mobility and natural gas markets in the US, Europe, China and Japan. Int J Hydrogen Energy 44:16048–16068. https://doi.org/10.1016/j.ijhydene.2019.04.22610.1016/j.ijhydene.2019.04.226 ↗
34. Wu C, Nahil MA, Miskolczi N, Huang J, Williams PT (2014) Processing real-world waste plastics by pyrolysis-reforming for hydrogen and high-value carbon nanotubes. Environ Sci Technol 48:819–826. https://doi.org/10.1021/es402488b10.1021/es402488b ↗
35. Mahato M, Gogoi M, Shah A, Mandal S (2022) The pyrolysis reactor apparatus and the process of MWCNT/H2 production using plastic waste. India E-2/115/2022/KOL 2022
36. Vilatela JJ, Rabanal ME, Sodi FC, Ruiz MG, Rodríguez JAJ, Reiband G, Terrones M (2015) A spray pyrolysis method to grow carbon nanotubes on carbon fibres, steel and ceramic bricks. J Nanosci Nanotechnol 15:2858–2864. https://doi.org/10.1166/jnn.2015.960110.1166/jnn.2015.9601 ↗
37. Guo G, Huang L, Chang Q, Ji L, Liu Y, Xie Y, Shi W, Jia N (2011) Sandwiched nanoarchitecture of reduced graphene oxide/ZnO nanorods/reduced graphene oxide on flexible PET substrate for supercapacitor. Appl Phys Lett 99:083111. https://doi.org/10.1063/1.362978910.1063/1.3629789 ↗
38. George R, Kumar LA, Alagappan M (2019) Synthesis of nanotubular nio-cnt composite and its application in temperature independent CO2 gas sensors fabricated using interdigitated silver electrode. Dig J Nanomater Biostruct 14:213–224
39. Jiang L, Gao L, Sun J (2003) Production of aqueous colloidal dispersions of carbon nanotubes. J Colloid Interface Sci 260:89–94. https://doi.org/10.1016/S0021-9797(02)00176-510.1016/S0021-9797(02)00176-5 ↗
40. Xu H, Cheng X, Zhong J, Meng J, Yang M, Jia F, Xu Z, Kong H (2011) Characterization of multiwalled carbon nanotubes dispersing in water and association with biological effects. J Nanomater 2011:12. https://doi.org/10.1155/2011/93849110.1155/2011/938491 ↗
41. Tauc J, Grigorovici R, Vancu A (1966) Optical properties and electronic structure of amorphous germanium. Phys Stat Sol 15:627–637. https://doi.org/10.1002/pssb.1966015022410.1002/pssb.19660150224 ↗
42. Mallick P, Sahoo CS (2013) Effect of CuO addition on the structural and optical properties of NiO nanoparticles. Nanosci Nanotechnol 3:52–55. https://article.sapub.org/10.5923.j.nn.20130303.04
43. Birjega R, Vlad A, Matei A, Ion V, Luculescu C, Dinescu M, Zavoianu R (2016) Growth and characterization of ternary Ni, Mg–Al and Ni–Al layered double hydroxides thin films deposited by pulsed laser deposition. Thin Solid Films 614:36–41. https://doi.org/10.1016/j.tsf.2015.11.06610.1016/j.tsf.2015.11.066 ↗
44. Askari MB, Banizi ZT, Soltani S, Seifi M (2018) Comparison of optical properties and photocatalytic behavior of TiO2/MWCNT, CdS/MWCNT and TiO2/CdS/MWCNT nano-composites. Optik 157:230–239. https://doi.org/10.1016/j.ijleo.2017.11.08010.1016/j.ijleo.2017.11.080 ↗
45. Khan J, Ilyas S, Akram B, Ahmad K, Hafeez M, Siddiq M, Ashraf MA (2018) Zno/NiO coated multi-walled carbon nanotubes for textile dyes degradation. Arab J Chem 11:880-896. https://doi.org/10.1016/j.arabjc.2017.12.02010.1016/j.arabjc.2017.12.020 ↗
46. Chai R, Li Y, Zhang Q, Li Y, Fan S, Zhang Z, Chen P, Zhao G, Liu Y, Lu Y (2016) Foam-structured NiO–MgO–Al2O3 nanocomposites derived from NiMgAl-LDHs in situ grown onto Ni-foam: a promising catalyst for high-throughput catalytic oxy-methane reforming. Chem Cat Chem 9:268–272. https://doi.org/10.1021/acssuschemeng.7b0071710.1021/acssuschemeng.7b00717 ↗
47. Jing C, Zhang Q, Liu X, Chen Y, Wang X, Xia L, Zeng H, Wang D, Zhang W, Dong F (2019) Design and fabrication of hydrotalcite-like ternary NiMgAl layered double hydroxide nanosheets as battery-type electrodes for high-performance supercapacitors. RSC Adv 9:9604–9612. https://doi.org/10.1039/C9RA01341E10.1039/C9RA01341E ↗
48. Kong J, Cassell AM, Dai H (1998) Chemical vapor deposition of methane for single-walled carbon nanotubes. Chem Phys Lett 292:567–574. https://doi.org/10.1016/S0009-2614(98)00745-310.1016/S0009-2614(98)00745-3 ↗
49. Arani HF, Mirhabibi AR, Collins S, Daroughegi R, Soltani AK, Naghizadeh R, Riahi-Noori N, Aghababazadeh R, Westwood A (2017) Enhancement in graphitization of coal tar pitch by functionalized carbon nanotubes. RSC Adv 7:5533–5540. https://doi.org/10.1039/C6RA25441A10.1039/C6RA25441A ↗
50. Li P, Zhu M, Tian Z, Han Y, Zhang Y, Zhou T, Kang L, Dan J, Guo X, Yu F, Wang Q, Dai B (2017) Two-dimensional layered double hydroxide derived from vermiculite wastewater supported highly dispersed Ni nanoparticles for CO methanation. Catalysts 7:1–10. https://doi.org/10.3390/catal703007910.3390/catal7030079 ↗
51. Du X, Zhang D, Gao R, Huang L, Shi L, Zhang J (2013) Design of modular catalysts derived from NiMgAl-LDH@m-SiO2 with dual confinement effects for dry reforming of methane. Chem Commun 49:6770–6772. https://doi.org/10.1039/C3CC42418A10.1039/C3CC42418A ↗
52. Davar F, Fereshteh Z, Salavati-Niasari M (2009) Nanoparticles Ni and NiO: synthesis, characterization and magnetic properties. J Alloys Compd 476:797–801. https://doi.org/10.1016/j.jallcom.2008.09.12110.1016/j.jallcom.2008.09.121 ↗
53. Srivastava N, Srivastava PC (2010) Realizing NiO nanocrystals from a simple chemical method. Bull Mater Sci 33:653–656. https://doi.org/10.1007/s12034-011-0142-010.1007/s12034-011-0142-0 ↗
54. Das R, Bee S, Hamid A, Ali E, Ramakrishna S (2015) Carbon nanotubes characterization by X-ray powder diffraction—a review. Curr Nanosci 11:1–13. https://doi.org/10.2174/157341371066614081821004310.2174/1573413710666140818210043 ↗
55. Gupta VK, Saleh TA (2011) Synthesis of carbon nanotube-metal oxides composites; adsorption and photo-degradation. In: Carbon nanotubes—from research to applications. IntechOpen, Shanghai, pp 295–31210.5772/18009 ↗
56. Nath D, Singh F, Das R (2020) X-ray diffraction analysis by Williamson–Hall, Halder–Wagner and size-strain plot methods of CdSe nanoparticles-a comparative study. Mater Chem Phys 239:122021–122030. https://doi.org/10.1016/j.matchemphys.2019.12202110.1016/j.matchemphys.2019.122021 ↗
57. Das HJ, Shah A, Singh LR, Mahato M (2021) Waste derived low cost PbO-Carbon nanocomposite and its energy storage application. Mat Today Proc 47:1072–1077. https://doi.org/10.1016/j.matpr.2021.06.43410.1016/j.matpr.2021.06.434 ↗
58. Holzwarth U, Gibson N (2011) The Scherrer equation versus the ’Debye–Scherrer equation. Nat Nanotechnol 6:534. https://doi.org/10.1038/nnano.2011.14510.1038/nnano.2011.145 ↗
59. Osswald S, Havel M, Gogotsi Y (2007) Monitoring oxidation of multiwalled carbon nanotubes by Raman spectroscopy. J Raman Spectrosc 38:728–736. https://doi.org/10.1002/jrs.168610.1002/jrs.1686 ↗
60. Jorio A, Saito R, Dresselhaus G, Dresselhaus MS (2004) Determination of nanotubes properties by Raman spectroscopy. Philos Trans A Math Phys Eng Sci 362:2311. https://doi.org/10.1098/rsta.2004.144310.1098/rsta.2004.1443 ↗
61. Dresselhaus MS, Dresselhaus G, Saito R, Jorio A (2005) Raman spectroscopy of carbon nanotubes. Phys Rep 409:47–99. https://doi.org/10.1016/j.physrep.2004.10.00610.1016/j.physrep.2004.10.006 ↗
62. Nakar D, Gordeev G, Machado L, Popovitz-Biro R, Rechav K, Oliveira E, Kusch P, Jorio A, Galvão D, Reich S, Joselevich E (2020) Few-wall carbon nanotube coils. Nano Lett 20:953–962. https://doi.org/10.1021/acs.nanolett.9b0397710.1021/acs.nanolett.9b03977 ↗
63. Zhao X, Ando Y (2002) Multiple splitting of G-band modes from individual multiwalled carbon nanotubes. Appl Phys Lett 81:2550–2552. https://doi.org/10.1063/1.150219610.1063/1.1502196 ↗
64. Rao A, Chen J, Richter E, Schlecht U, Eklund P, Haddon R, Venkateswaran U, Kwon Y, Tomanek D (2001) Effect of van der waals interactions on the Raman modes in single walled carbon nanotubes. Phys Rev Lett 86:3895–3898. https://doi.org/10.1103/PhysRevLett.86.389510.1103/PhysRevLett.86.3895 ↗
65. Su Y, Zhou P, Zhao J, Yang Z, Zhang (2013) Large-scale synthesis of few-walled carbon nanotubes by DC arc discharge in low-pressure flowing air. Mater Res Bull 48:3232–3235. https://doi.org/10.1016/j.materresbull.2013.04.09210.1016/j.materresbull.2013.04.092 ↗
66. Botti S, Rufoloni A, Rindzevicius T, Schmidt MS (2018) Surface-enhanced raman spectroscopy characterization of pristine and functionalized carbon nanotubes and graphene. In: Raman spectroscopy. IntechOpen, Shanghai, pp 203–21910.5772/intechopen.74065 ↗
67. Rezaee S, Ghaderi A, Boochani A, Solaymani S (2017) Synthesis of multiwalled carbon nanotubes on Cu–Fe nano-catalyst substrate. Res Phys 7:3640–3644. https://doi.org/10.1016/j.rinp.2017.09.04010.1016/j.rinp.2017.09.040 ↗
68. Gandhi AS, Pant J, Pandit SD, Dalimbkar SK, Chan T, Cheng C, Ma Y, Wu SY (2013) Short-range magnon excitation in NiO nanoparticles. J Phys Chem C 117:18666–18674. https://doi.org/10.1021/jp402947910.1021/jp4029479 ↗
69. Mironova-Ulmane N, Kuzmin A, Sildos I, Puust L, Grabis J (2019) Magnon and phonon excitations in nanosized NiO. Latv J Phys Tech Sci 50:61–72. https://doi.org/10.2478/lpts-2019-001410.2478/lpts-2019-0014 ↗
70. Aboul-Enein AA, Awadallah AE, Abdel-Rahman AAH, Haggar AM (2018) Synthesis of multi-walled carbon nanotubes via pyrolysis of plastic waste using a two-stage process. Fuller Nanotub Carbon Nanostruct 26:443–450. https://doi.org/10.1080/1536383X.2018.144792910.1080/1536383X.2018.1447929 ↗
71. Singh KK, Chaudhary SK, Venugopal R, Gaurav A (2017) Bulk synthesis of multi-walled carbon nanotubes by AC arc discharge method. J Nanomater Nanoeng Nanosyst 231:141–151. https://doi.org/10.1177/239779141771283610.1177/2397791417712836 ↗
72. Roy A, Ray A, Saha S, Ghosh M, Das T, Satpati B, Nandi M, Das S (2018) NiO-CNT composite for high performance supercapacitor electrode and oxygen evolution reaction. Electrochim Acta 283:327–337. https://doi.org/10.1016/j.electacta.2018.06.15410.1016/j.electacta.2018.06.154 ↗
73. Zolfaghari A, Ataherian F, Ghaemi M, Gholami A (2007) Capacitive behavior of nanostructured MnO2 prepared by sonochemistry method. Electrochim Acta 52:2806–2814. https://doi.org/10.1016/j.electacta.2006.10.03510.1016/j.electacta.2006.10.035 ↗
74. Xie X, Gao L (2007) Characterization of a manganese dioxide/carbon nanotube composite fabricated using an in situ coating method. Carbon NY 45:2365–2373. https://doi.org/10.1016/j.carbon.2007.07.01410.1016/j.carbon.2007.07.014 ↗
75. Arunkumar M, Paul A (2017) Importance of electrode preparation methodologies in supercapacitor applications. ACS Omega 2:8039–8050. https://doi.org/10.1021/acsomega.7b0127510.1021/acsomega.7b01275 ↗
76. Frackowiak E, Beguin F (2001) Carbon materials for the electrochemical storage of energy. Carbon NY 39:937–950. https://doi.org/10.1016/S0008-6223(00)00183-410.1016/S0008-6223(00)00183-4 ↗
77. Conway BE, Birss V, Wojtowicz J (1997) The role and utilization of pseudocapacitance for energy storage by supercapacitors. J Power Sources 66:1–14. https://doi.org/10.1016/S0378-7753(96)02474-310.1016/S0378-7753(96)02474-3 ↗
78. Lee JY, Liang K, An KH, Lee YH (2005) Nickel oxide/carbon nanotubes nanocomposite for electrochemical capacitance. Synth Met 150:153–157. https://doi.org/10.1016/j.synthmet.2005.01.01610.1016/j.synthmet.2005.01.016 ↗
79. Ardizzone S, Fregonara G, Trasatti S (1990) “Inner” and “Outer” active surface of RuO2 electrodes. Electrochim Acta 35:263–267. https://doi.org/10.1016/0013-4686(90)85068-X10.1016/0013-4686(90)85068-X ↗
80. Sankar KV, Selvan RK (2014) The preparation of MnFe2O4 decorated flexible graphene wrapped with PANI and its electrochemical performances for hybrid supercapacitors. RSC Adv 4:17555–17566. https://doi.org/10.1039/c3ra47681b10.1039/c3ra47681b ↗
81. Lan Y, Zhao H, Zong Y, Li X, Sun Y, Feng J, Wang Y, Zhenga X, Du Y (2018) Phosphorization boosts the capacitance of mixed metal nanosheet arrays for high performance supercapacitor electrodes. Nanoscale 10:11775–11781. https://doi.org/10.1039/C8NR01229F10.1039/C8NR01229F ↗
82. Mei B-A, Munteshari O, Lau J, Dunn B, Pilon L (2018) Physical Interpretations of nyquist plots for EDLC electrodes and devices. J Phys Chem C 122:194–206. https://doi.org/10.1021/acs.jpcc.7b1058210.1021/acs.jpcc.7b10582 ↗
83. Aboutalebi SH, Chidembo AT, Salari M, Konstantinov K, Wexler D, Liuac HK, Doua SX (2011) Comparison of GO, GO/MWCNTs composite and MWCNTs as potential electrode materials for supercapacitors. Energy Environ Sci 4:1855. https://doi.org/10.1039/c1ee01039e10.1039/c1ee01039e ↗
84. Zhao G, Li Y, Zhu G, Shi J, Lu T, Pan L (2019) Biomass-based N, P, and S self-doped porous carbon for high-performance supercapacitors. ACS Sustain Chem Eng 7:12052–12060. https://doi.org/10.1021/acssuschemeng.9b0072510.1021/acssuschemeng.9b00725 ↗
85. Simon R, Chakraborty S, Darshini KS, Mary NL (2020) Electrolyte dependent performance of graphene–mixed metal oxide composites for enhanced supercapacitor applications. SN Appl Sci 2:1898. https://doi.org/10.1007/s42452-020-03708-910.1007/s42452-020-03708-9 ↗
86. Pal B, Yang S, Ramesh S, Thangadurai V, Jose R (2019) Electrolyte selection for supercapacitive devices: a critical review. Nanoscale Adv 1:3807–3835. https://doi.org/10.1039/C9NA00374F10.1039/C9NA00374F ↗
87. Salunkhe RR, Jang K, Lee SW, Yu S, Ahn H (2012) Binary metal hydroxide nanorods and multi-walled carbon nanotube composites for electrochemical energy storage applications. J Mater Chem 22:21630–21635. https://doi.org/10.1039/c2jm32638h10.1039/c2jm32638h ↗
88. Salunkhe RR, Lin J, Malgras V, Dou SX, Kim JH, Yamauchi Y (2015) Large-scale synthesis of coaxial carbon nanotube/Ni (OH)2 composites for asymmetric supercapacitor application. Nano Energy 11:211–218. https://doi.org/10.1016/j.nanoen.2014.09.03010.1016/j.nanoen.2014.09.030 ↗
89. Chiang IDNK, Lim MSS, Peng DC (2014) Novel bimetallic tin-manganese oxides/carbon nanotube nanocomposite and their charge storage properties. J Inst Eng Malaysia 75:24–39. http://103.86.130.60/xmlui/handle/123456789/36826
90. Iqbal N, Wang X, Babar AA, Yu J, Ding B (2016) Highly flexible NiCo2O4/CNTs doped carbon nanofibers for CO2 adsorption and supercapacitor electrodes. J Colloid Interface Sci 476:87–93. https://doi.org/10.1016/j.jcis.2016.05.01010.1016/j.jcis.2016.05.010 ↗
91. Boukhalfa S, Evanoff K, Yushin G (2012) Atomic layer deposition of vanadium oxide on carbon nanotubes for high-power supercapacitor electrodes. Energy Environ Sci 5:6872–6879. https://doi.org/10.1039/C2EE21110F10.1039/C2EE21110F ↗
92. Zhao X, Johnston C, Grant PS (2009) A novel hybrid supercapacitor with a carbon nanotube cathode and an iron oxide/carbon nanotube composite anode. J Mater Chem 19:8755–8760. https://doi.org/10.1039/b909779a10.1039/b909779a ↗
93. Fan Z, Chen J, Wang M, Cui K, Zhou H, Kuang Y (2006) Preparation and characterization of manganese oxide/CNT composites as supercapacitive materials. Diam Relat Mater 15:1478–1483. https://doi.org/10.1016/j.diamond.2005.11.00910.1016/j.diamond.2005.11.009 ↗
94. Kim DW, Rhee KY, Park SJ (2012) Synthesis of activated carbon nanotube/copper oxide composites and their electrochemical performance. J Alloys Compd 530:6–10. https://doi.org/10.1016/j.jallcom.2012.02.15710.1016/j.jallcom.2012.02.157 ↗
95. Karthikeyan K, Amaresh S, Aravindan V, Lee YS (2013) Microwave assisted green synthesis of MgO-carbon nanotube composites as electrode material for high power and energy density supercapacitors. J Mater Chem A 1:4105–4111. https://doi.org/10.1039/c3ta01608k10.1039/c3ta01608k ↗
96. Kumar N, Yu YC, Lu YH, Tseng TY (2016) Fabrication of carbon nanotube/cobalt oxide nanocomposites via electrophoretic deposition for supercapacitor electrodes. J Mater Sci 51:2320–2329. https://doi.org/10.1007/s10853-015-9540-910.1007/s10853-015-9540-9 ↗
97. Pande SA, Pandit B, Sankapal BR (2019) Vanadium oxide anchored MWCNTs nanostructure for superior symmetric electrochemical supercapacitors. Mater Des 182:107972. https://doi.org/10.1016/j.matdes.2019.10797210.1016/j.matdes.2019.107972 ↗
98. Ranjithkumar R, Arasi SE, Sudhahar S, Nallamuthu N, Devendran P, Lakshmanan P, Kumar MK (2019) Enhanced electrochemical studies of ZnO/CNT nanocomposite for supercapacitor devices. Phys B 568:51–59. https://doi.org/10.1016/j.physb.2019.05.02510.1016/j.physb.2019.05.025 ↗
99. Atchudan R, Edison TNJI, Perumal S, Ranjithkumar D, Lee YR (2019) Direct growth of iron oxide nanoparticles filled multi-walled carbon nanotube via chemical vapour deposition method as high-performance supercapacitors. Int J Hydrogen Energy 44:2349–2360. https://doi.org/10.1016/j.ijhydene.2018.08.18310.1016/j.ijhydene.2018.08.183 ↗