期刊
JOURNAL OF POWER SOURCES
卷 326, 期 -, 页码 313-321出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.07.009
关键词
Cathode materials; Electrical conductivity; Graphene; Lithium ion batteries; Nitrogen doping
资金
- National Natural Science Foundation of China [21403195, 51472127]
- Promotive Research Fund for Excellent Young Scientists of Shandong Province [BS2013NJ006]
- Science & Technology Youth-Star Program of Jinan Science & Technology Bureau [2013036]
In this work, N-doped graphene and carbon co-modified Li3V2(PO4)(3) composites (LVP/NGC) are successfully fabricated through a xerogel method for the first time. The obtained architecture combines two types of electronic contact with Li3V2(PO4)(3) particles: the point-to-face contact of N-doped graphene and the face-to-face contact of N-doped carbon coating layers. Profiting from the favorable complex structure, graphene and carbon coating layers offer an extraordinary network for electron transfer and hence an excellent long-term and high-rate performance. Even tested at the rate of 40 C, the reversible capacity still maintains 86.9 mAh g(-1) after 800 cycles without any fading. This work provides a promising route to improve the long-term and high-rate performance of cathodes for LIBs and enlightens us on exploring preferable strategies to develop advanced electrode materials for other energy storage devices. (C) 2016 Elsevier B.V. All rights reserved.
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