Journal
RSC ADVANCES
Volume 4, Issue 44, Pages 23338-23343Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra03037k
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Funding
- National Natural Science Foundation of China [50872016, 20973033, 51125009]
- National Natural Science Foundation for Creative Research [21221061]
- Hundred Talents Program of the Chinese Academy of Sciences
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We designed a new type of ionic pseudocapacitor system with excellent contributions from ionic-state redox mediators, including a redox couple [Fe(CN)(6)](3-) /[Fe(CN)(6)](4-) in the electrolyte and redox cations in highly electroactive colloid electrodes. The highest pseudocapacitance value of 12 658 mF cm(-2) was obtained, which is a 7-fold increase in the specific capacitance of the CoCl2 electrode for K3Fe(CN)(6) in a KOH alkaline electrolyte at a current density of 20 mA cm 2 and at a potential interval of 0.55 V. The currently designed supercapacitor systems show a versatile strategy to design highperformance supercapacitors with CoCl2, CuCl2, NiCl2, and FeCl3 electrodes.
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