材料科学
电解质
聚合物
电池(电)
锂硫电池
锂(药物)
阴极
背景(考古学)
纳米技术
化学工程
离子电导率
电极
复合材料
化学
物理化学
古生物学
功率(物理)
内分泌学
工程类
物理
生物
医学
量子力学
作者
Ming Liu,Dong Zhou,Yan‐Bing He,Yongzhu Fu,Xianying Qin,Miao Cui,Hongda Du,Baohua Li,Quan‐Hong Yang,Zhiqun Lin,Tianshou Zhao,Feiyu Kang
出处
期刊:Nano Energy
[Elsevier]
日期:2016-04-01
卷期号:22: 278-289
被引量:370
标识
DOI:10.1016/j.nanoen.2016.02.008
摘要
The ability to suppress the dissolution of lithium polysulfides in liquid electrolyte (LE) is emerging and scientifically challenging, representing an important endeavor toward successful commercialization of lithium–sulfur (Li–S) batteries. In this context, a common and effective strategy to address this challenge is to replace the LE with a gel polymer electrolyte (GPE). However, the limited ionic conductivity of state-of-the-art GPEs and poor electrode/GPE interfaces greatly restrict their implementation. Herein, we report, for the first time, a facile in-situ synthesis of pentaerythritol tetraacrylate (PETEA)-based GPE with an extremely high ionic conductivity (1.13×10−2 S cm−1). Quite intriguingly, even interfaced with a bare sulfur cathode, this GPE rendered the resulting polymer Li–S battery with a low electrode/GPE interfacial resistance, high rate capacity (601.2 mA h g−1 at 1 C) and improved capacity retention (81.9% after 400 cycles at 0.5 C). These remarkable performances can be ascribed to the immobilization of soluble polysulfides imparted by PETEA-based GPE and the construction of a robust integrated GPE/electrode interface. Notably, due to the tight adhesion between the PETEA-based GPE and electrodes, a high-performance flexible polymer Li–S battery was successfully crafted. This work therefore opens up a convenient, low-cost and effective way to substantially enhance the capability of Li–S batteries, a key step toward capitalizing on GPE for high-performance Li–S batteries.
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