期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 15, 页码 7035-7042出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta01239j
关键词
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资金
- National Natural Science Foundation of China [51071107, 51002188, 51272173]
- Foundation for the Author of National Excellent Doctoral Dissertation of China [201145]
- Program for New Century Excellent Talents in University [NCET-12-0408]
- Natural Science Foundation of Tianjin City [12JCYBJC11700]
- Elite Scholar Program of Tianjin University
- Innovation Foundation of Tianjin University
- Tianjin Science and Technology Major Project [16ZXCLGX00110]
- National Basic Research Program of China [2010CB934700]
A convenient and scalable in situ chemical vapor deposition (CVD) method is developed for one-step fabrication of sandwiched graphene sheets which were filled with yolk-shell gamma-Fe2O3 nanoparticles encapsulated with graphene shells (YS-gamma-Fe2O3@G-GS). Such a unique architecture can be applied to produce an excellent lithium ion battery (LIB) anode. As a result, long-term cycling stability at high rates (a high capacity of 663.7 mA h g(-1) is achieved at 2 A g(-1) and maintained at approximately 96.6% even after 1500 cycles) and superior rate capability (1173 mA h g(-1) at 0.1C, 989 mA h g(-1) at 0.2C, 827 mA h g(-1) at 0.5C, 737 mA h g(-1) at 1C, 574 mA h g(-1) at 2C, 443 mA h g(-1) at 5C, and 350 mA h g(-1) at 10C; 1C = 1 A g(-1)) can be obtained when YS-gamma-Fe2O3@G-GS is used as an LIB anode. As far as we know, this is the best rate capacity and longest cycle life ever reported for an Fe2O3-based LIB anode.
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