An enhanced poly(vinylidene fluoride) matrix separator with TEOS for good performance lithium-ion batteries

被引：13
|
作者：
Liu, Jiuqing [1 ]
Wang, Cheng [1 ]
Wu, Xiufeng [1 ]
Zhu, Fangfang [1 ]
Liu, Meng [1 ]
Xi, Yang [1 ]
机构：
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2019年 / 23卷 / 01期
基金：
国家重点研发计划;
关键词：
Separator; Phase inversion; PVDF; TEOS; Lithium-ion battery; INDUCED PHASE-SEPARATION; GEL POLYMER ELECTROLYTE; MEMBRANE FORMATION; POLYETHYLENE; CONDUCTIVITY; CHALLENGES; LIQUID; BLEND;
D O I：
10.1007/s10008-018-4126-5
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The low crystallinity poly(vinylidene fluoride)/tetraethyl orthosilicate silane (PVDF/TEOS) composite separator with a finger-like pore structure for lithium-ion battery has been successfully prepared by non-solvent-induced phase separation (NIPS) technique. The PVDF/TEOS composite separator shows the excellent wettability and electrolyte retention properties compared with Celgard 2320 separator. AC impedance spectroscopy results indicate that the novel PVDF/TEOS composite separator has ion conductivity of 1.22mScm(-1) at 25 degrees C, higher than that of Celgard 2320 separator (0.88mScm(-1)). The lithium-ion transference number of PVDF composite separator added 0.7% TEOS was 0.481, better than that of Celgard 2400 (0.332). What is more, the lithium-ion batteries assembled with PVDF/TEOS composite separator show good cycling performance and rate capability.
引用
收藏
页码：277 / 284
页数：8
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