期刊
JOURNAL OF POWER SOURCES
卷 326, 期 -, 页码 389-396出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.07.016
关键词
Lithium ion battery; N-doped graphene; Anode; Porous property; Prolonged cycle life
资金
- 111 Project of China [B14040]
- National Natural Science Foundation of China [21343011, 21503158, 21203145]
- Natural Science Foundation of Shaanxi Province [2014JQ2-2007]
- Fundamental Research Funds for Central Universities of China [xjj2014044]
Fe2O3 anode suffers from drastic volume change during cycling and poor electronic conductivity, resulting in inferior electrochemical performance. To address these problems, the Fe2O3/nitrogen-doped graphene sheets hybridization strategy is proposed by a hydrothermal/annealing process. In this composite, Fe2O3 nanoparticles are tightly confined in graphene sheets matrix and the porous structure is obtained due to the crumpled and cross-like graphene framework, which can alleviate the volume expansion, maintain integrity of the electrode, and improve electrical conductivity and Li+ diffusion. As a result, benefiting from the synergistic effect of N-doped graphene sheets matrix and Fe2O3 nanoparticles, the composite exhibits a reversible capacity up to 952 mAh g(-1) at a current density of 100 mA g(-1) and excellent rate capability (348 mAh g(-1) at a current density 5000 mA g(-1)). (C) 2016 Elsevier B.V. All rights reserved.
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