Composite of a nonwoven fabric with poly(vinylidene fluoride) as a gel membrane of high safety for lithium ion battery
Composite of a nonwoven fabric with poly(vinylidene fluoride) as a gel membrane of high safety for lithium ion battery
复制标题
DOI：
10.1039/c2ee23564a
复制
发表时间：
2013-07
影响因子：
32.5
通讯作者：
Yusong Zhu;Faxing Wang;Lili Liu;S. Xiao;Z. Chang;Yuping Wu
中科院分区：
文献类型：
--
作者：
Yusong Zhu;Faxing Wang;Lili Liu;S. Xiao;Z. Chang;Yuping Wu
据报道，一种无纺布与聚偏二氟乙烯的复合膜具有高安全性（自熄性）、良好的机械性能和低成本。在环境温度下，所制备的用1 mol l−1 LiPF6 电解质饱和的凝胶膜的离子电导率可达0.30 mS cm−1，高于相应的常用商业隔膜（Celgard 2730）的0.21 mS cm−1。此外，室温下凝胶膜中的锂离子迁移几乎是商用隔膜的两倍。此外，吸收的溶剂在高温下难以蒸发。通过使用LiFePO4阴极评估其电化学性能。所得结果表明，这种凝胶型复合膜对于需要高安全性和低成本的大容量电池系统非常有吸引力。
A composite membrane of a nonwoven fabric with poly(vinylidene fluoride) exhibiting high safety (self-extinguishing), good mechanical property and low cost is reported. The ionic conductivity of the as-prepared gel membrane saturated with 1 mol l−1 LiPF6 electrolyte at ambient temperature can be up to 0.30 mS cm−1, higher than that of the corresponding well-used commercial separator (Celgard 2730), 0.21 mS cm−1. Moreover, the lithium ion transference in the gel membrane at room temperature is almost twice that in the commercial separator. Furthermore, the absorbed solvent is difficult to evaporate at elevated temperature. Its electrochemical performance is evaluated by using a LiFePO4 cathode. The obtained results suggest that this gel-type composite membrane is very attractive for large-capacity battery systems requiring high safety and low cost.