Anisotropic semi-aligned PAN@PVdF-HFP separator for Li-ion batteries

Anisotropic semi-aligned PAN@PVdF-HFP separator for Li-ion batteries
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用于锂离子电池的各向异性半排列PAN@​​PVdF-HFP隔膜

DOI:
10.1088/1361-6528/aba303
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发表时间:
2020-07
期刊:
影响因子:
3.5
通讯作者:
Yanhuai Ding
Yanhuai Ding
中科院分区:
材料科学3区
文献类型:
--
作者:
Qiuhong Liu;Wenwu Jiang;Weizheng Lu;Yufan Mei;Fakang He;Minhui Zhang;Yin Liu;Yunqing Chen;Jinfeng Peng;Yanhuai Ding

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与普通静电纺纳米纤维相比,这种纳米纤维的取向表现出有趣的各向异性力学性能和结构稳定性。本文采用改进的静电纺丝法制备了半取向PAN@PVdF-HFP纳米纤维膜。与静电纺丝PAN膜相比,复合隔膜具有各向异性的力学性能和增强的电化学性能。PAN@PVdF-HFP隔膜可提供1.2 mS/cm −1的离子电导率,电化学稳定性高达5.0 V。具有半对齐PAN@PVdF-HFP隔膜的LiFePO 4/Li电池显示出优异的循环性能、良好的倍率性能以及高放电容量。
Compared with the common electrospun nanofibers, the alignment of the nanofibers exhibits interesting anisotropic mechanical properties and structural stability. In this paper, semi-aligned PAN@PVdF-HFP nanofiber separators were prepared by a modified electrospinning method. The composite separators exhibit anisotropic mechanical properties and enhanced electrochemical performance compared with electrospun PAN films. The PAN@PVdF-HFP nanofiber separator can deliver an ionic conductivity of 1.2 mSċcm−1 with electrochemical stability up to 5.0 V. The LiFePO4/Li cell with semi-aligned PAN@PVdF-HFP separator shows excellent cycling performance, good rate capability, as well as high discharge capacity.
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