期刊
JOURNAL OF POWER SOURCES
卷 299, 期 -, 页码 417-424出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.09.037
关键词
Separator; Li-ion battery; Polyaniline nanowires; Polyimide nanofibers; Electrospinning
资金
- National Natural Science Foundation of China [21174058, 21374044]
- Jiangxi Provincial Department of Science and Technology [20114ABF05100]
- Technology Plan Landing Project of Jiangxi Provincial Department of Education [KJLD1104]
Polyaniline/polyimide (PANI/PI) composites with hierarchical 3D micro/nano-architecture have been prepared via electrospinning and in-situ polymerization. The PANI/PI composite prepared from 0.2 M aniline (PANI/PI-2) exhibited a small average pore size (1.730 mu m) and a narrow pore size distribution (1.552-1.882 mu m). Compared to the commercial polyolefin separators, the PANI/PI composite separator possesses a much better thermal stability up to 180 degrees C, a higher porosity (84%), a larger liquid electrolyte uptake (619%) and a higher ionic conductivity (2.33 mS cm(-1)). The cell with PANI/PI-2 composite separator showed a low interfacial resistance, an enhanced capacity (133 mAh g(-1) at 0.2C), a better rate capability (41.4% at 10C) and cyclability (89.3% retention after 500 charge/discharge cycles at 0.2C). The PANI/PI composite with a superior thermal stability and high electrochemical performances is a promising candidate for uses in high perform LIBs. (C) 2015 Elsevier B.V. All rights reserved.
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