Journal
JOURNAL OF POWER SOURCES
Volume 241, Issue -, Pages 572-577Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.05.003
Keywords
Electrochemical capacitor; Hybrid capacitor; Manganese oxide; Protected lithium anode
Funding
- Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST)
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An aqueous hybrid electrochemical capacitor consisting of a capacitive manganese oxide (MnO2) positive electrode and a water-stable, protected Li negative electrode in near-neutral aqueous electrolyte (1.0 M Li2SO4, pH = 5.5) is demonstrated. Galvanostatic charge/discharge cycling tests were conducted with pouched cells, offering a cell voltage of 4.2 V with maximum specific energy of 753 W h kg(-1) based on the positive electrode. The combination of a pseudocapacitive MnO2 positive and a Li negative electrode offers high specific charge and cell voltage, resulting in an aqueous hybrid electrochemical capacitor having exceptionally high specific energy. (C) 2013 Elsevier B.V. All rights reserved.
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