复合数
聚丙烯腈
材料科学
锂(药物)
电解质
电化学
快离子导体
聚合物
丁二腈
乙烯醇
陶瓷
锂电池
化学工程
电化学窗口
复合材料
离子键合
离子电导率
电极
离子
化学
有机化学
工程类
物理化学
内分泌学
医学
作者
Hoai Khang Tran,Yi–Shiuan Wu,Wen-Chen Chien,She‐Huang Wu,Rajan Jose,Shingjiang Jessie Lue,Chun‐Chen Yang
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2020-11-03
卷期号:3 (11): 11024-11035
被引量:43
标识
DOI:10.1021/acsaem.0c02018
摘要
In this study, we used a solution-casting technique to prepare all-solid-state composite polymer electrolytes (CPEs) based on poly(vinyl alcohol)/polyacrylonitrile blends, the ceramic filler Li1.4Al0.4Ti1.6(PO4)3 (LATP, NASICON-type structure), lithium bis(trifluoromethanesulfonyl)imide, and the solid plasticizer succinonitrile (SN) and then investigated their electrochemical stability, ionic transport properties, and interfacial behavior against lithium electrodes. The CPEs prepared with optimal concentrations of LATP (20 wt %) and SN (10 wt %) exhibited a maximum ionic conductivity of 1.13 × 10–4 S cm–1 at 25 °C, a Li+-ion transference number of 0.507, and an electrochemical stability window of 5.1 V (vs Li/Li+). This CPE was a free-standing membrane and highly flexible. An all-solid-state Li//LiFePO4 battery assembled with this CPE displayed excellent cycling stability and rate performance at room temperature. A maximum discharge capacity of 159.6 mA h g–1 was achieved at 0.1C. The full cell achieved a discharge capacity of 119.4 mA h g–1 at 0.5C and a capacity retention of 90.5% after 100 cycles at ambient temperature. Therefore, this as-prepared CPE shows great promise for use in all-solid-state lithium-metal batteries.
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