期刊
ELECTROCHIMICA ACTA
卷 86, 期 -, 页码 282-286出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.05.111
关键词
Hybrid LiC capacitor; Activated carbon; Graphite; Lithium intercalation; High energy density; LiTFSI electrolyte
资金
- French National Agency for Research (ANR)
- Foundation for Polish Science
A hybrid LiC capacitor combining a lithium-ion battery type (graphite) electrode and an electrical double-layer (activated carbon) one has been developed by preloading graphite from 2 mol L-1 lithium bis(trifluoromethane)sulfonimide (LiTFSI) organic electrolyte. The graphite intercalation compound was formed by applying ca. 10 successive charge/self-discharge pulses. The optimized hybrid device operates in the voltage range from 1.5 to 4.2V and displays 60% higher gravimetric capacitance than an electric double-layer (EDL) capacitor using the same activated carbon for both electrodes. As a result, the energy density reaches 80 Wh kg(-1), which is four times higher than the value for the EDL capacitor with the same total mass of carbon. (C) 2012 Elsevier Ltd. All rights reserved.
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