期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 27, 页码 7933-7941出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta10736a
关键词
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资金
- National 973 Program of China [2009CB939903, 2011AA050505]
- National 863 Program of China [2009CB939903, 2011AA050505]
- NSF of China [91122034, 51125006, 51102263, 21101164]
- US Department of Energy (BES) [DE-FG02-11ER46814]
A carbon coated LiFePO4 (LFP) composite based on electrochemically cleaved graphite oxides (ECGO) for a lithium-ion battery cathode material with excellent electrochemical properties and high tap density has been prepared by an in situ solvothermal approach combined with a cold-press calcination process, in which the ECGO with high hydrophilicity and good conductivity is used as a carbon-based material. The co-modification of LFP with a carbon coating and ECGO can produce an effective three-dimensional (3D) conducting network, which significantly improves the electronic conductivity of the C/LFP/ECGO composite. This composite exhibits a high reversible discharge capacity of 166 mA h g(-1) at 0.1 C and 115 mA h g(-1) at 10 C, as well as an excellent cycling stability with capacity retention ratios of 99.35% and 97.66% after 100 cycles at 1 C and 10 C, respectively.
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