Journal
ELECTROCHEMISTRY
Volume 81, Issue 10, Pages 795-797Publisher
ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.81.795
Keywords
Hybrid Capacitor; Ruthenium Oxide; Nanosheets; Buffer Solution
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Funding
- Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST)
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The electrochemical property of RuO2 nanosheets in acetic acid-lithium acetate buffered electrolytes was studied in an attempt to understand the charge storage mechanism in neutral solutions and to improve the charge storage capability of aqueous hybrid capacitors. High specific capacitance and good rate capability were obtained for RuO2 nanosheets in acetic acid buffered solution containing Li+ (pH similar to 5.3). Maximum capacitance of 1038 F g(-1) was achieved, which is higher than the values in acidic electrolyte. Using RuO2 nanosheet electrodes as positive electrode in acetic acid-lithium acetate buffered electrolyte with a multi-layered Li negative electrode, high specific energy of 724 Wh kg(-1) based on the positive electrode mass was attained. (c) The Electrochemical Society of Japan, All rights reserved.
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