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题名: A graphene/PVDF/PP multilayer composite separator for long-life and high power lithium-ion batteries
作者: Bu, Ai-Xiu;  Tan, Yong;  Fang, Ruo-Pian;  Li, Feng;  Pei, Song-Feng;  Ren, Wen-Cai
发表日期: 2017-2-1
摘要: The separator is an important part of lithium-ion batteries and its optimization from both material and structural considerations can improve the performance of the battery. We prepared multilayer separators by coating a slurry containing graphene and PVDF in N-methylpyrrolidone on one side of a commercial polypropylene (PP) separator, followed by water treatment at 60 degrees C for 6 h and vacuum drying at 60 degrees C for 12 h to manipulate the pore structure of the composite layer. Results indicate that the discharge capacities of batteries using PP and the composite separator were nearly the same at a low rate of 0.5 C. However, the capacity of the former at a high rate of 5 C fades quickly while that of the latter remains almost unchanged after 600 cycles. The composite separators have a high absorption and wettability of the electrolyte, resulting in an improved conductivity.
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Recommended Citation:
Bu, Ai-Xiu,Tan, Yong,Fang, Ruo-Pian,et al. A Graphene/pvdf/pp Multilayer Composite Separator For Long-life And High Power Lithium-ion Batteries[J]. New Carbon Materials,2017,32(1):63-70.

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