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Materials 2017, 10(4), 414; doi:10.3390/ma10040414

A High Performance Lithium-Ion Capacitor with Both Electrodes Prepared from Sri Lanka Graphite Ore

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Academic Editors: Bingqing Wei and Jian-Gan Wang
Received: 26 February 2017 / Revised: 28 March 2017 / Accepted: 6 April 2017 / Published: 14 April 2017
(This article belongs to the Special Issue Materials for Electrochemical Capacitors and Batteries)
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Abstract

The natural Sri Lanka graphite (vein graphite) is widely-used as anode material for lithium-ion batteries (LIBs), due to its high crystallinity and low cost. In this work, graphitic porous carbon (GPC) and high-purity vein graphite (PVG) were prepared from Sri Lanka graphite ore by KOH activation, and high temperature purification, respectively. Furthermore, a lithium-ion capacitor (LIC) is fabricated with GPC as cathode, and PVG as anode. The assembled GPC//PVG LIC shows a notable electrochemical performance with a maximum energy density of 86 W·h·kg−1 at 150 W·kg−1, and 48 W·h·kg−1 at a high-power density of 7.4 kW·kg−1. This high-performance LIC based on PVG and GPC is believed to be promising for practical applications, due to its low-cost raw materials and industrially feasible production. View Full-Text
Keywords: lithium-ion capacitor; Sri Lanka graphite; graphitic porous carbon; KOH activation lithium-ion capacitor; Sri Lanka graphite; graphitic porous carbon; KOH activation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gao, X.; Zhan, C.; Yu, X.; Liang, Q.; Lv, R.; Gai, G.; Shen, W.; Kang, F.; Huang, Z.-H. A High Performance Lithium-Ion Capacitor with Both Electrodes Prepared from Sri Lanka Graphite Ore. Materials 2017, 10, 414.

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