材料科学
离子电导率
电解质
复合数
离子键合
聚合物
环氧树脂
复合材料
韧性
锂(药物)
化学工程
纳米技术
电极
离子
化学
有机化学
物理化学
内分泌学
工程类
医学
作者
Ziqi Zeng,Xin Chen,Mengjun Sun,Zhipeng Jiang,Wei Hu,Chuang Yu,Shijie Cheng,Jia Xie
出处
期刊:Nano Letters
[American Chemical Society]
日期:2021-03-23
卷期号:21 (8): 3611-3618
被引量:47
标识
DOI:10.1021/acs.nanolett.1c00583
摘要
The design of solid polymer electrolytes (SPE) with high ionic conductivity and excellent mechanical properties is challenging because these two properties are often conflicting. To achieve both, a reaction-controlled strategy is proposed based on the nanophase separation of an ionic transport pathway and a supporting matrix to balance ionic mobility and mechanical properties. Specifically, an elastic epoxy polymer electrolyte (eEPE), synthesized via two-step polymerization, combines outstanding mechanical strength (toughness of 3.4 MJ m–3) and high ionic conductivity (3.5 × 10–4 S cm–1 at 25 °C). The nanostructured eEPE is both tough and flexible, therefore promotes uniform deposition of Li even under a high current density (2 mA cm–2 and 2 mAh cm–2). Importantly, eEPE composite films greatly improve the safety performance of the LiFePO4/Li pouch cells: safe operations are achieved under several abusive conditions. This work highlights an alternative route for high-safety solid-state lithium metal batteries of the next generation.
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