Effect of synthesis routes on structural, optical, and electrochemical properties of Co3O4 nanoparticles

1. N.L. Panwar, S.C. Kaushik, S. Kothari, Role of renewable energy sources in environmental protection: A review. Renew. Sustain. Energy Rev. 15, 1513–1524 (2011). https://doi.org/10.1016/j.rser.2010.11.03710.1016/j.rser.2010.11.037 ↗

2. P.A. Østergaard, N. Duic, Y. Noorollahi, S. Kalogirou, Renewable energy for sustainable development. Renew. Energy. 199, 1145–1152 (2022). https://doi.org/10.1016/j.renene.2022.09.06510.1016/j.renene.2022.09.065 ↗

3. J. Zhang, M. Gu, X. Chen, Supercapacitors for renewable energy applications: A review. Micro Nano Eng. 21, 100229 (2023). https://doi.org/10.1016/j.mne.2023.10022910.1016/j.mne.2023.100229 ↗

4. J. Libich, J. Máca, J. Vondrák, O. Čech, M. Sedlaříková, Supercapacitors: Properties and applications. J. Energy Storage. 17, 224–227 (2018). https://doi.org/10.1016/j.est.2018.03.01210.1016/j.est.2018.03.012 ↗

5. S. Karthikeyan, B. Narenthiran, A. Sivanantham, L.D. Bhatlu, T. Maridurai, Supercapacitor: Evolution and review. Mater. Today Proc., Elsevier Ltd. 46, 3984–3988 (2020). https://doi.org/10.1016/j.matpr.2021.02.52610.1016/j.matpr.2021.02.526 ↗

6. M. Pershaanaa, S. Bashir, S. Ramesh, K. Ramesh, Every bite of Supercap: A brief review on construction and enhancement of supercapacitor. J. Energy Storage. 50, 104599 (2022). https://doi.org/10.1016/j.est.2022.10459910.1016/j.est.2022.104599 ↗

7. K.K. Patel, T. Singhal, V. Pandey, T.P. Sumangala, M.S. Sreekanth, Evolution and recent developments of high performance electrode material for supercapacitors: A review. J. Energy Storage. 44 (2021). https://doi.org/10.1016/j.est.2021.10336610.1016/j.est.2021.103366 ↗

8. R. Dubey, V. Guruviah, Review of carbon-based electrode materials for supercapacitor energy storage. Ionics (Kiel). 25, 1419–1445 (2019). https://doi.org/10.1007/s11581-019-02874-010.1007/s11581-019-02874-0 ↗

9. R. Liang, Y. Du, P. Xiao, J. Cheng, S. Yuan, Y. Chen, J. Yuan, J. Chen, Transition metal oxide electrode materials for supercapacitors: A review of recent developments. Nanomaterials. 11, 1248 (2021). https://doi.org/10.3390/nano1105124810.3390/nano11051248 ↗

10. F. Manteghi, S.H. Kazemi, M. Peyvandipour, A. Asghari, Preparation and application of cobalt oxide nanostructures as electrode materials for electrochemical supercapacitors. RSC Adv. 5, 76458–76463 (2015). https://doi.org/10.1039/c5ra09060a10.1039/c5ra09060a ↗

11. F. Ali, N.R. Khalid, Facile synthesis and properties of chromium-doped cobalt oxide (Cr-doped Co3O4) nanostructures for supercapacitor applications. Appl. Nanosci. (Switzerland). 10, 1481–1488 (2020). https://doi.org/10.1007/s13204-020-01266-510.1007/s13204-020-01266-5 ↗

12. A.A. Vodyashkin, P. Kezimana, F.Y. Prokonov, I.A. Vasilenko, Y.M. Stanishevskiy, Current methods for synthesis and potential applications of cobalt nanoparticles: a review. Crystals (Basel). 12, 272 (2022). https://doi.org/10.3390/cryst1202027210.3390/cryst12020272 ↗

13. S.M. Hashemzadeh, A. Khorshidi, M. Arvand, Anion engineering in lithium cobalt oxide for application in high-performance supercapacitors. Sci. Rep. 15 (2025). https://doi.org/10.1038/s41598-025-95338-710.1038/s41598-025-95338-7 ↗

14. D. Bokov, A. Turki Jalil, S. Chupradit, W. Suksatan, M. Javed Ansari, I.H. Shewael, G.H. Valiev, E. Kianfar, Nanomaterial by sol-gel method: synthesis and application. Adv. Mater. Sci. Eng. 2021 (2021). https://doi.org/10.1155/2021/510201410.1155/2021/5102014 ↗

15. D.D.M. Prabaharan, K. Sadaiyandi, M. Mahendran, S. Sagadevan, Precipitation method and characterization of cobalt oxide nanoparticles. Appl. Phys. Mater. Sci. Process. 123 (2017). https://doi.org/10.1007/s00339-017-0786-810.1007/s00339-017-0786-8 ↗

16. G. Yang, S.J. Park, Conventional and microwave hydrothermal synthesis and application of functional materials: A review. Materials. 12, 1177 (2019). https://doi.org/10.3390/ma1207117710.3390/ma12071177 ↗

17. K.M. Girish, R. Lavanya, N. Sowmyshree, K.D. Jain, K. Gurushantha, T. Ramakrishnappa, Preparation and electrochemical properties of Co3O4 as potential electrode materials for supercapacitor and battery applications. Future Batteries. 6, 100071 (2025). https://doi.org/10.1016/j.fub.2025.10007110.1016/j.fub.2025.100071 ↗

18. S. Kalpana, V.S. Bhat, G. Hegde, T.N. Prabhu, P.N. Anantharamaiah, The evaluation of the electrochemical properties of Co3O4 nanopowders synthesized by autocombustion and sol–gel methods. Chem. Pap. 78, 343–356 (2024). https://doi.org/10.1007/s11696-023-03093-810.1007/s11696-023-03093-8 ↗

19. R. Sakthi Murugan, P.S.M. Hajasharif, C. Manoharan, A. Dinesh, S. Suthakaran, M. Ayyar, M. Hashem, H. Fouad, Effect of Cu substitution on morphological optical and electrochemical properties of Co3O4 nanoparticles by co-precipitation method. Results Chem. 11, 101830 (2024). https://doi.org/10.1016/j.rechem.2024.10183010.1016/j.rechem.2024.101830 ↗

20. C.R. Babu, A.V. Avani, S. Shaji, E.I. Anila, Electrochemical characteristics of Co3O4 nanoparticles synthesized via the hydrothermal approach for supercapacitor applications. J. Solid State Electrochem. 28, 2203–2210 (2024). https://doi.org/10.1007/s10008-023-05744-y10.1007/s10008-023-05744-y ↗

21. S. Jadhav, R. Kalubarme, R. Chauhan, A. Singh, B. Kale, M. Ashokkumar, S. Gosavi, Nanocrystalline Ag-doped cobalt oxide as aflexibleelectrodematerial for high performancesupercapacitorapplication. J. Energy Storage. 58, 106326 (2023). https://doi.org/10.1016/j.est.2022.10632610.1016/j.est.2022.106326 ↗

22. M. Liao, Y. Liu, Z. Hu, Q. Yu, Novel morphologic Co3O4 of flower-like hierarchical microspheres as electrode material for electrochemical capacitors. J. Alloys Compd. 562, 106–110 (2013). https://doi.org/10.1016/j.jallcom.2013.01.12010.1016/j.jallcom.2013.01.120 ↗

23. T. Ungár, Microstructural parameters from X-ray diffraction peak broadening. Scr. Mater. 51, 777–781 (2004). https://doi.org/10.1016/j.scriptamat.2004.05.00710.1016/j.scriptamat.2004.05.007 ↗

24. A.L. Patterson, The scherrer formula for I-Ray particle size determination (1939)10.1103/PhysRev.56.978 ↗

25. D. Nath, F. Singh, R. Das, 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 (2020). https://doi.org/10.1016/j.matchemphys.2019.12202110.1016/j.matchemphys.2019.122021 ↗

26. G.K. Williamson, W.H. Hall, X-ray line broadening from filed aluminium and wlfram*. Acta Metallurgica. 1, 22 (1953). https://doi.org/10.1016/0001-6160(53)90006-610.1016/0001-6160(53)90006-6 ↗

27. L. Chong, H. Guo, Y. Zhang, Y. Hu, Y. Zhang, Raman Study of Strain Relaxation from Grain Boundaries in Epitaxial Graphene Grown by Chemical Vapor Deposition on SiC. Nanomaterials. 9, 372 (2019). https://doi.org/10.3390/nano903037210.3390/nano9030372 ↗

28. D. Kumar, M. Singh, A.K. Singh, Crystallite size effect on lattice strain and crystal structure of Ba1/4Sr3/4MnO3 layered perovskite manganite (2018). p. 030185. https://doi.org/10.1063/1.503252010.1063/1.5032520 ↗

29. H.M. Rietveld, A profile refinement method for nuclear and magnetic structures (1969)10.1107/S0021889869006558 ↗

30. D. Pavithra, K. Sujatha, A.P. Sudha, Synthesis and Characterization of Nano sized Cobalt Oxide by Precipitation Method. Nanoscale Rep. 3(3), 1–5 (2020). https://doi.org/10.26524/nr.3.1710.26524/nr.3.17 ↗

31. K.P. Latha, C. Prema, S.M. Sundar, Synthesis and Characterization of Cobalt Oxide Nanoparticles. J. Nanosci. Technol. 4, 475–477 (2018). https://doi.org/10.30799/jnst.144.1804050410.30799/jnst.144.18040504 ↗

32. J. Jiang, L. Li, Synthesis of sphere-like Co3O4 nanocrystals via a simple polyol route. Mater. Lett. 61, 4894–4896 (2007). https://doi.org/10.1016/j.matlet.2007.03.06710.1016/j.matlet.2007.03.067 ↗

33. Y. Mijiti, K. Chen, J.E.F.S. Rodrigues, Z. Hu, L. Nataf, A. Trapananti, A. Di Cicco, F. Baudelet, Crystal and electronic structure of Co3O4 spinel under pressure probed by XANES and Raman spectroscopy. Phys. Rev. B 103, 024105 (2021). https://doi.org/10.1103/PhysRevB.103.02410510.1103/PhysRevB.103.024105 ↗

34. Y. Zhao, F. Dong, W. Han, H. Zhao, Z. Tang, The synergistic catalytic effect between graphene oxide and three-dimensional ordered mesoporous Co3O4 nanoparticles for low-temperature CO oxidation. Microporous Mesoporous Mater. 273, 1–9 (2019). https://doi.org/10.1016/j.micromeso.2018.06.04210.1016/j.micromeso.2018.06.042 ↗

35. V. Swamy, Size-dependent modifications of the first-order Raman spectra of nanostructured rutile TiO2. Phys. Rev. B Condens. Matter Mater. Phys. 77, 195414 (2008). https://doi.org/10.1103/PhysRevB.77.19541410.1103/PhysRevB.77.195414 ↗

36. M.N. Islam, A. Pradhan, S. Kumar, Effects of crystallite size distribution on the Raman-scattering profiles of silicon nanostructures. J. Appl. Phys. 98, 024309 (2005). https://doi.org/10.1063/1.198053710.1063/1.1980537 ↗

37. A.M. Abdallah, R. Awad, Sm and Er partial alternatives of Co in Co3O4 nanoparticles: Probing the physical properties. Phys. B Condens. Matter. 608 (2021). https://doi.org/10.1016/j.physb.2021.41289810.1016/j.physb.2021.412898 ↗

38. M.B. Muradov, S.J. Mammadyarova, G.M. Eyvazova, O.O. Balayeva, S.Z. Melikova, N. Sadigov, M.I. Abdullayev, N. Musayeva, E.K. Gasimov, F.H. Rzayev, I. Hasanova, Sonochemical Synthesis and Characterization of Structural, Optical and Dielectric Properties of Ag-Doped Co3O4 Nanoparticles. J. Clust Sci. 35, 845–861 (2024). https://doi.org/10.1007/s10876-023-02514-810.1007/s10876-023-02514-8 ↗

39. Q. Yan, X. Li, Q. Zhao, G. Chen, Shape-controlled fabrication of the porous Co3O4 nanoflower clusters for efficient catalytic oxidation of gaseous toluene. J. Hazard. Mater. 209–210 (2012). https://doi.org/10.1016/j.jhazmat.2012.01.03910.1016/j.jhazmat.2012.01.039 ↗

40. D.C. Onwudiwe, M.P. Ravele, E.E. Elemike, Eco-friendly synthesis, structural properties and morphology of cobalt hydroxide and cobalt oxide nanoparticles using extract of Litchi chinensis. Nano-Struct. Nano-Objects. 23, 100470 (2020). https://doi.org/10.1016/j.nanoso.2020.10047010.1016/j.nanoso.2020.100470 ↗

41. A.N. Naveen, S. Selladurai, Investigation on physiochemical properties of Mn substituted spinel cobalt oxide for supercapacitor applications. Electrochim. Acta. 125, 404–414 (2014). https://doi.org/10.1016/j.electacta.2014.01.16110.1016/j.electacta.2014.01.161 ↗

42. B. Niu, F. Zhang, H. Ping, N. Li, J. Zhou, L. Lei, J. Xie, J. Zhang, W. Wang, Z. Fu, Sol-gel autocombustion synthesis of nanocrystalline high-entropy alloys. Sci. Rep. 7 (2017). https://doi.org/10.1038/s41598-017-03644-610.1038/s41598-017-03644-6 ↗

43. Z. Wang, L. Yang, C. Xu, J. Cheng, J. Zhao, Q. Huang, C. Yang, Advances in reactive co-precipitation technology for preparing high-performance cathodes. Green. Carbon. 1, 193–209 (2023). https://doi.org/10.1016/j.greenca.2023.12.00110.1016/j.greenca.2023.12.001 ↗

44. D. Barreca, C. Massignan, S. Daolio, M. Fabrizio, C. Piccirillo, L. Armelao, E. Tondello, Composition and microstructure of cobalt oxide thin films obtained from a novel cobalt(II) precursor by chemical vapor deposition. Chem. Mater. 13, 588–593 (2001). https://doi.org/10.1021/cm001041x10.1021/cm001041x ↗

45. V. Ratchagar, M. Muralidharan, M. Silambarasan, K. Jagannathan, P. Kamaraj, S.K. Subbiah, P.A. Vivekanand, G. Periyasami, M. Rahaman, P. Karthikeyan, G. Gonfa, K. Jagannathan, P. Kamaraj, G. Gonfa, Coprecipitation Methodology Synthesis of Cobalt-Oxide Nanomaterials Influenced by pH Conditions: Opportunities in Optoelectronic Applications. Int. J. Photoenergy. 2023, 2493231 (2023). https://doi.org/10.1155/2023/249323110.1155/2023/2493231 ↗

46. G. Wang, X. Shen, J. Horvat, B. Wang, H. Liu, D. Wexler, J. Yao, Hydrothermal synthesis and optical, magnetic, and supercapacitance properties of nanoporous cobalt oxide nanorods. J. Phys. Chem. C 113, 4357–4361 (2009). https://doi.org/10.1021/jp810614910.1021/jp8106149 ↗

47. J. Pal, P. Chauhan, Study of physical properties of cobalt oxide (Co3O4) nanocrystals. Mater. Charact. 61, 575–579 (2010). https://doi.org/10.1016/j.matchar.2010.02.01710.1016/j.matchar.2010.02.017 ↗

48. K. Kaviyarasu, A. Raja, P.A. Devarajan, Structural elucidation and spectral characterizations of Co3O4 nanoflakes, Spectrochim. Acta A Mol. Biomol. Spectrosc. 114, 586–591 (2013). https://doi.org/10.1016/j.saa.2013.04.12610.1016/j.saa.2013.04.126 ↗

49. S.C. Lims, M. Jose, S. Aswathappa, S.S.J. Dhas, R.S. Kumar, P.V. Pham, Co-precipitation synthesis of highly pure and Mg-doped CdO nanoparticles: from rod to sphere shapes. RSC Adv. 14, 22690–22700 (2024). https://doi.org/10.1039/d4ra03525a10.1039/d4ra03525a ↗

50. M.B. Muradov, S.J. Mammadyarova, G.M. Eyvazova, O.O. Balayeva, G. Aliyeva, I. Hasanova, S.Z. Melikova, N. Musayeva, N. Sadigov, M.I. Abdullayev, Synthesis of CuxCo3–xO4 nanoparticles by a sonochemical method and characterization of structural and optical properties and photocatalytic activity for the degradation of methylene blue. RSC Adv. 14, 1082–1093 (2024). https://doi.org/10.1039/d2ra08060e10.1039/d2ra08060e ↗

51. H. Xu, H.C. Zeng, Self-generation of tiered surfactant superstructures for one-pot synthesis of Co3O4 nanocubes and their close-and non-close-packed organizations. Langmuir. 20, 9780–9790 (2004). https://doi.org/10.1021/la04916410.1021/la049164 ↗

52. Y. Sun, X. Sun, J. Zhang, S. Liu, L. Guo, J. Bi, N. Huang, Boosting the electrochemical properties of CoCo2O4porous nanowire arrays by microwave-assisted synthesis for battery-supercapacitor hybrid devices. Sustain. Energy Fuels. 5, 3918–3928 (2021). https://doi.org/10.1039/d1se00636c10.1039/d1se00636c ↗

53. A. Nano, Q. Liao, N. Li, S. Jin, G. Yang, C. Wang, Subscriber access provided by UB + Fachbibliothek Chemie | (FU-Bibliothekssystem) all-solid-state symmetric supercapacitor based on Co3O4 nanoparticles on vertically aligned graphene, 9, 5310–5315 (2015). https://doi.org/10.1021/acsnano.5b0082110.1021/acsnano.5b00821 ↗

54. Y. Zheng, Y. Tian, S. Sarwar, J. Luo, X. Zhang, Carbon nanotubes decorated NiSe2 nanosheets for high-performance supercapacitors. J. Power Sources. 452, 227793 (2020). https://doi.org/10.1016/j.jpowsour.2020.22779310.1016/j.jpowsour.2020.227793 ↗

55. H. Wang, M. Liang, D. Duan, W. Shi, Y. Song, Z. Sun, Rose-like Ni3S4 as battery-type electrode for hybrid supercapacitor with excellent charge storage performance. Chem. Eng. J. 350, 523–533 (2018). https://doi.org/10.1016/j.cej.2018.05.00410.1016/j.cej.2018.05.004 ↗

56. A.F. Alem, A.K. Worku, D.W. Ayele, T.A. Wubieneh, A. abebaw Teshager, Tadele mihret kndie, B.T. Admasu, M.A. Teshager, A.A. Asege, M.D. Ambaw, M.A. Zeleke, A.K. Shibesh, T.A. Yemata, Ag doped Co3O4 nanoparticles for high-performance supercapacitor application. Heliyon. 9, 13286 (2023). https://doi.org/10.1016/j.heliyon.2023.e1328610.1016/j.heliyon.2023.e13286 ↗

57. R.C. Ambare, S.R. Bharadwaj, B.J. Lokhande, Non-aqueous route spray pyrolyzed Ru: Co3O4 thin electrodes for supercapacitor application. Appl. Surf. Sci. 349, 887–896 (2015). https://doi.org/10.1016/j.apsusc.2015.04.17510.1016/j.apsusc.2015.04.175 ↗

58. K.M. Girish, R. Lavanya, N. Sowmyshree, K.D. Jain, K. Gurushantha, T. Ramakrishnappa, Preparation and electrochemical properties of Co3O4 as potential electrode materials for supercapacitor and battery applications. Future Batteries. 6, 100071 (2025). https://doi.org/10.1016/j.fub.2025.10007110.1016/j.fub.2025.100071 ↗

59. M. Aadil, S. Zulfiqar, M. Shahid, S. Haider, I. Shakir, M.F. Warsi, Binder free mesoporous Ag-doped Co3O4 nanosheets with outstanding cyclic stability and rate capability for advanced supercapacitor applications. J. Alloys Compd. 844, 156062 (2020). https://doi.org/10.1016/j.jallcom.2020.15606210.1016/j.jallcom.2020.156062 ↗

60. K. Ullah, K.S. Cho, K. Wijaya, W.C. Oh, Bandgap energy controlling and electrochemical performances of quaternary metal oxide combined graphene-TiO2 nanocomposite and its photocatalytic hydrogen evolution. Inorg. Chem. Commun. 167, 112541 (2024). https://doi.org/10.1016/j.inoche.2024.11254110.1016/j.inoche.2024.112541 ↗

61. M. Girirajan, V. Arumugam, S. Subramaniyan, R.P. Manimuthu, S. Sakkarapani, Two-Dimensional Layered Bismuthene/Antimonene Nanocomposite as a Potential Electrode Material for the Fabrication of High-Energy Density Hybrid Supercapacitors. Energy Fuels. 36, 12299–12309 (2022). https://doi.org/10.1021/acs.energyfuels.2c0232110.1021/acs.energyfuels.2c02321 ↗

62. H. Lindstro, S. So, A. Solbrand, H. Rensmo, J. Hjelm, A. Hagfeldt, S.-E. Lindquist, Li+ Ion Insertion in TiO2 (Anatase). Voltammetry on Nanoporous Films. J. Phys. Chem. B 101, 7717–7722 (1997). https://pubs.acs.org/sharingguidelines10.1021/jp970490q ↗

63. K. Tao, Y. Yang, C. Yang, Q. Ma, L. Han, Construction of NiCo2O4 nanosheet-decorated leaf-like Co3O4 nanoarrays from metal-organic framework for high-performance hybrid supercapacitors. Dalton Trans. 48, 14156–14163 (2019). https://doi.org/10.1039/c9dt02907a10.1039/c9dt02907a ↗

64. M. Chatterjee, S. Sain, A. Roy, S. Das, S.K. Pradhan, Enhanced electrochemical properties of Co3O4 with morphological hierarchy for energy storage application: A comparative study with different electrolytes. J. Phys. Chem. Solids. 148, 109733 (2021). https://doi.org/10.1016/j.jpcs.2020.10973310.1016/j.jpcs.2020.109733 ↗

65. M. Girirajan, N.B. Alagarsamy, K. Ramachandran, R.P. Manimuthu, D. Pazhanivel, K.K. Muthusamy, S. Sakkarapani, Two dimensional layered bismuthene nanosheets with ultra-fast charge transfer kinetics as a superior electrode material for high performance asymmetric supercapacitor. Electrochim. Acta. 426 (2022). https://doi.org/10.1016/j.electacta.2022.14083810.1016/j.electacta.2022.140838 ↗

66. D. Chao, C. Zhu, P. Yang, X. Xia, J. Liu, J. Wang, X. Fan, S.V. Savilov, J. Lin, H.J. Fan, Z.X. Shen, Array of nanosheets render ultrafast and high-capacity Na-ion storage by tunable pseudocapacitance. Nat. Commun. 7, 12122 (2016). https://doi.org/10.1038/ncomms1212210.1038/ncomms12122 ↗

67. C. Cougnon, Impact of the Scan Rate on the Stability Window of an Electrical Double-Layer Capacitor. Energies. 16(15), 5687 (2023). https://doi.org/10.3390/en1615568710.3390/en16155687 ↗

68. E. Noormohammadi, S. Sanjabi, F. Soavi, F. Poli, Electrodeposited Cobalt–Copper mixed oxides for supercapacitor electrodes and investigation of the Co/Cu ratio on the electrochemical performance. Mater. Renew. Sustain. Energy. 12, 53–61 (2023). https://doi.org/10.1007/s40243-023-00229-410.1007/s40243-023-00229-4 ↗

69. T. Huang, Z. Qiu, Z. Hu, Z. Zhang, Facile synthesis of porous rod-like CuCo2O4 nano-materials for high energy density asymmetric supercapacitors. Ionics (Kiel). 27, 4473–4482 (2021). https://doi.org/10.1007/s11581-021-04191-x10.1007/s11581-021-04191-x ↗

70. A. Ray, A. Roy, M. Ghosh, J.A. Ramos-Ramón, S. Saha, U. Pal, S.K. Bhattacharya, S. Das, Study on charge storage mechanism in working electrodes fabricated by sol-gel derived spinel NiMn2O4 nanoparticles for supercapacitor application. Appl. Surf. Sci. 463, 513–525 (2019). https://doi.org/10.1016/j.apsusc.2018.08.25910.1016/j.apsusc.2018.08.259 ↗

71. S. Aouini, A. Bardaoui, A.M. Ferraria, D.M.F. Santos, R. Chtourou, ZnMn2O4 Nanopyramids fabrication by hydrothermal route: Effect of reaction time on the structural, morphological, and electrochemical properties. Energies (Basel). 15, 9352 (2022). https://doi.org/10.3390/en1524935210.3390/en15249352 ↗

72. I.B. Ahmed, M. Diaby, H. Nafati, A. Bardaoui, D.M.F. Santos, R. Chtourou, I. Ben, Assaker, Supercapacitive performance of 3D-cobalt oxide (Co3O4) nanowires grown onto anodized stainless-steel substrate: Effect of anodization time. Solid State Sci. 152 (2024). https://doi.org/10.1016/j.solidstatesciences.2024.10753710.1016/j.solidstatesciences.2024.107537 ↗

73. H.S. Magar, R.Y.A. Hassan, A. Mulchandani, Electrochemical Impedance Spectroscopy (EIS): Principles, Construction, and Biosensing Applications. Sensors. 21, 6578 (2021). https://doi.org/10.3390/s2119657810.3390/s21196578 ↗

74. A.R.C. Bredar, A.L. Chown, A.R. Burton, B.H. Farnum, Electrochemical Impedance Spectroscopy of Metal Oxide Electrodes for Energy Applications. ACS Appl. Energy Mater. 3, 66–98 (2020). https://doi.org/10.1021/acsaem.9b0196510.1021/acsaem.9b01965 ↗

75. A.C. Lazanas, M.I. Prodromidis, E.I.S.A. Tutorial, ACS Meas. Sci. Au. 3, 162–193 (2023). https://doi.org/10.1021/acsmeasuresciau.2c0007010.1021/acsmeasuresciau.2c00070 ↗