Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors
Source abstract
Abstract
Electrochemical supercapacitors can deliver high levels of electrical power and offer long operating lifetimes, but their energy storage density is too low for many important applications. Pseudocapacitive transition-metal oxides such as MnO(2) could be used to make electrodes in such supercapacitors, because they are predicted to have a high capacitance for storing electrical charge while also being inexpensive and not harmful to the environment. However, the poor conductivity of MnO(2) (10(-5)-10(-6) S cm(-1)) limits the charge/discharge rate for high-power applications. Here, we show that hybrid structures made of nanoporous gold and nanocrystalline MnO(2) have enhanced conductivity, resulting in a specific capacitance of the constituent MnO(2) (~1,145 F g(-1)) that is close to the theoretical value. The nanoporous gold allows electron transport through the MnO(2), and facilitates fast ion diffusion between the MnO(2) and the electrolytes while also acting as a double-layer capacitor. The high specific capacitances and charge/discharge rates offered by such hybrid structures make them promising candidates as electrodes in supercapacitors, combining high-energy storage densities with high levels of power delivery.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoporous metals and alloys · Supercapacitor Materials and Fabrication · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (35)
Show source-provided references
1. Winter, M. & Brodd, R. J. What are batteries, fuel cells, and supercapacitors? Chem. Rev. 104, 4245–4269 (2004).10.1021/cr020730k ↗
2. Conway, B. E. Electrochemical Supercapacitors: Scientific Fundamentals and Technological Applications (Kluwer, 1999).
3. Simon, P. & Gogotsi, Y. Materials for electrochemical capacitors. Nature Mater. 7, 845–854 (2008).10.1038/nmat2297 ↗
4. Aricò, A. S., Bruce, P., Scrosati, B., Tarascon, J. M. & Van Schalkwijk, W. Nanostructured materials for advanced energy conversion and storage devices. Nature Mater. 4, 366–377 (2005).10.1038/nmat1368 ↗
5. Miller, J. R. & Simon P. Electrochemical capacitors for energy management. Science 321, 651–652 (2008).10.1126/science.1158736 ↗
6. Pech, D. et al. Ultrahigh-power micrometer-sized supercapacitors based on onion-like carbon. Nature Nanotech. 5, 651–654 (2010).10.1038/nnano.2010.162 ↗
7. Chmiola, J., Largeot, C., Taberna, P. L., Simon, P. & Gogotsi, Y. Monolithic Carbide-derived carbon films for micro-supercapacitors. Science 328, 480–483 (2010).10.1126/science.1184126 ↗
8. Huang, J. S., Sumpter, B. G. & Meunier, V. Theoretical model for nanoporous carbon supercapacitors. Angew. Chem. Int. Ed. 47, 520–524 (2008).10.1002/anie.200703864 ↗
9. Toupin, M., Brousse, T. & Bélanger, D. Charge storage mechanism of MnO2 electrode used in aqueous electrochemical capacitor. Chem. Mater. 16, 3184–3190 (2004).10.1021/cm049649j ↗
10. Chang, J. K. & Tsai, W. T. Material characterization and electrochemical performance of hydrous manganese oxide electrodes for use in electrochemical pseudocapacitors. J. Electrochem. Soc. 150, A1333–A1338 (2003).10.1149/1.1605744 ↗
11. Bélanger, D., Brousse, T. & Long, J. W. Manganese oxides: battery materials make the leap to electrochemical capacitors. Electrochem. Soc. Interface 17, 49–52 (2008).10.1149/2.F07081IF ↗
12. Conway, B. E., Birss, V. & Wojtowicz, J. The role and utilization of pseudocapacitance for energy storage by supercapacitors. J. Power Sources 66, 1–14 (1997).10.1016/S0378-7753(96)02474-3 ↗
13. Rudge, A., Davey, J., Raistrick, I., Gottesfeld, S. & Ferraris, J. P. Conducting polymers as active materials in electrochemical capacitors. J. Power Sources 47, 89–107 (1994).10.1016/0378-7753(94)80053-7 ↗
14. Chmiola, J. et al. Anomalous increase in carbon capacitance at pore sizes less than 1 nanometer. Science 313, 1760–1763 (2006).10.1126/science.1132195 ↗
15. Kaempgen, M., Chan, C. K., Ma, J., Cui, Y. & Gruner, G. Printable thin film supercapacitors using single-walled carbon nanotubes. Nano Lett. 9, 1872–1876 (2009).10.1021/nl8038579 ↗
16. Pushparaj, V. L. et al. Flexible energy storage devices based on nanocomposite paper. Proc. Natl Acad. Sci. USA 104, 13574–13577 (2007).10.1073/pnas.0706508104 ↗
17. Wu, M. Q., Snook, G. A., Chen, G. Z. & Fray, D. J. Redox deposition of manganese oxide on graphite for supercapacitors. Electrochem. Commun. 6, 499–504 (2004).10.1016/j.elecom.2004.03.011 ↗
18. Yan, J. et al. Carbon nanotube/MnO2 composites synthesized by microwave-assisted method for supercapacitors with high power and energy densities. J. Power Sources 194, 1202–1207 (2009).10.1016/j.jpowsour.2009.06.006 ↗
19. Reddy, A. L. M., Shaijumon, M. M., Gowda, S. R. & Ajayan, P. M. Multisegmented Au–MnO2/carbon nanotube hybrid coaxial arrays for high-power supercapacitor applications. J. Phys. Chem. C 114, 658–663 (2010).10.1021/jp908739q ↗
20. Hu, L. B. et al. Stretchable, porous, and conductive energy textiles. Nano Lett. 10, 708–714 (2010).10.1021/nl903949m ↗
21. Lei, Y., Fournier, C., Pascal, J. L. & Favier, F. Mesoporous carbon–manganese oxide composite as negative electrode material for supercapacitors. Micropor. Mesopor. Mater. 110, 167–176 (2008).10.1016/j.micromeso.2007.10.048 ↗
22. Zhou, R. F. et al. High-performance supercapacitors using a nanoporous current collector made from super-aligned carbon nanotubes. Nanotechnology 21, 345701 (2010).10.1088/0957-4484/21/34/345701 ↗
23. Liu, R. & Lee, S. B. MnO2/poly(3,4-ethylenedioxythiophene) coaxial nanowires by one-step coelectrodeposition for electrochemical energy storage. J. Am. Chem. Soc. 130, 2942–2943 (2008).10.1021/ja7112382 ↗
24. Chen, L. et al. Synthesis and pseudocapactive studies of composite films of polyaniline and manganese oxide nanoparticles. J. Power Sources 195, 3742–3747 (2010).10.1016/j.jpowsour.2009.12.036 ↗
25. Nakayama, M., Kanaya, T. & Inoue, R. Anodic deposition of layered manganese oxide into a colloidal crystal template for electrochemical supercapacitor. Electrochem. Commun. 9, 1154–1158 (2007).10.1016/j.elecom.2007.01.021 ↗
26. Bruce, P. G., Scrosati, B. & Tarascon, J. M. Nanomaterials for rechargeable lithium batteries. Angew. Chem. Int. Ed. 47, 2930–2946 (2008).10.1002/anie.200702505 ↗
27. Fujita, T. et al. Unusually small electrical resistance of three-dimensional nanoporous gold in external magnetic fields. Phys. Rev. Lett. 101, 166601 (2008).10.1103/PhysRevLett.101.166601 ↗
28. Erlebacher, J., Aziz, M. J., Karma, A., Dimitrov, N. & Sieradzki, K. Evolution of nanoporosity in dealloying. Nature 410, 450–453 (2001).10.1038/35068529 ↗
29. Potapov, P. L., Jorissen, K. & Schryvers D. Effect of charge transfer on EELS integrated cross sections in Mn and Ti oxides. Phys. Rev. B 70, 045106 (2004).10.1103/PhysRevB.70.045106 ↗
30. Zhou, Y. K., He, B. L., Zhang, F. B. & Li, H. L. Hydrous manganese oxide/carbon nanotube composite electrodes for electrochemical capacitors. J. Solid State Electrochem. 8, 482–487 (2004).10.1007/s10008-003-0468-7 ↗
31. Hou, Y., Cheng, Y. W., Hobson, T. & Liu J. Design and synthesis of hierarchical MnO2 nanospheres/carbon nanotubes/conducting polymer ternary composite for high performance electrochemical electrodes. Nano Lett. 10, 2727–2733 (2010).10.1021/nl101723g ↗
32. Lee, S. W., Kim, J., Chen, S., Hammond, P. T. & Shao-Horn, Y. Carbon nanotube/manganese oxide ultrathin film electrodes for electrochemical capacitors. ACS Nano 4, 3889–3896 (2010).10.1021/nn100681d ↗
33. Fischer, A. E., Saunders, M. P., Pettigrew, K. A., Rolison, D. R. & Long, J. W. Electroless deposition of nanoscale MnO2 on ultraporous carbon nanoarchitectures: correlation of evolving pore–solid structure and electrochemical performance. J. Electrochem. Soc. 155, A246–A252 (2008).10.1149/1.2830548 ↗
34. Lee, S. W., Kim, B. S., Chen, S., Shao-Horn, Y. & Hammond, P. T. Layer-by-layer assembly of all carbon nanotube ultrathin films for electrochemical applications. J. Am. Chem. Soc. 131, 671–679 (2009).10.1021/ja807059k ↗
35. Pang, S. C., Anderson, M. A. & Chapman, T. W. Novel electrode materials for thin-film ultracapacitors: comparison of electrochemical properties of sol–gel-derived and electrodeposited manganese dioxide. J. Electrochem. Soc. 147, 444–450 (2000).10.1149/1.1393216 ↗