期刊
ELECTROCHIMICA ACTA
卷 76, 期 -, 页码 130-136出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.04.152
关键词
Hybrid capacitors; LFP; AC; CMC
资金
- Westfalische Wilhelms Universitat Munster
- Ministerium far Innovation, Wissenschaft, Forschung und Technologie des Landes Nordrhein-Westfalen (MIWFT)
In this work we report the properties and electrochemical performance of composite electrodes containing lithium iron phosphate (LFP) and activated carbon (AC) as the active materials. These composite electrodes display high capacity during cycles carried out at specific current as high as 17.2 A g(-1). Moreover, even after 500 cycles carried out at 8.6A g(-1), the electrodes display capacity retention higher than 98%. The high performance of these composite electrodes can be explained by a positive influence of AC on the LFP performance. The presence of AC increases the conductivity, reduces the density and modifies the porosity of the electrodes. The dilution of the LFP particles (with respect to the electrodes containing only LFP) results in exceptional high rare performance. During cycles carried out at specific current higher than 12 A g(-1), LFP-AC electrodes display two times higher specific capacities compared to electrodes containing only LFP as active material. (C) 2012 Elsevier Ltd. All rights reserved.
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