Journal
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
Volume 50, Issue 6, Pages 594-598Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1023193514020074
Keywords
activated carbon; hard carbon; graphite; lithium ion capacitors; asymmetrical capacitors
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Funding
- Special Fund Program for the Development of Strategic Emerging Industries in Shenzhen, China [JCYJ20120619140727666, ZDSY20120619141659791]
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The electrochemical properties of various commercial carbon materials (activated carbon (AC), graphite (GP) and hard carbon (HC)) have been investigated for use as negative electrode for lithium ion capacitors. The rate capabilities and cycle durabilities are tested up to 20 C and 1000 cycles using full cell configurations. It is found that the lithium ion could not efficiently intercalate into the activated carbon materials. The symmetrical AC/AC capacitor shows good cycle durabilities at 10 C with capacity of 17 mA h g(-1). The asymmetrical capacitors AC/GP and AC/HC with intercalated negative electrodes show higher capacities than that of AC/AC capacitor. Moreover, the AC/HC has better rate capabilities than AC/GP.
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