材料科学
环氧乙烷
电解质
离子液体
化学工程
锂(药物)
准固态
离子电导率
离子
氧化物
快离子导体
离子键合
聚合物
电化学
电导率
复合材料
化学
电极
有机化学
物理化学
冶金
共聚物
色素敏化染料
催化作用
医学
工程类
内分泌学
作者
Zhitao Wang,Hu Zhou,Chunfeng Meng,Weiwei Xiong,Yueji Cai,Pinfei Hu,Huan Pang,Aihua Yuan
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2020-04-24
卷期号:3 (5): 4265-4274
被引量:62
标识
DOI:10.1021/acsaem.9b02543
摘要
Poly(ethylene oxide) (PEO)-based polymer electrolytes have shown extraordinary promise for all-solid-state lithium batteries; however, the practical application was severely restricted by their low ionic conductivity. In this work, the robust pores of HKUST-1(Cu) were first filled by a lithium-containing ionic liquid (Li-IL) to form ion-conductive Li-IL@HKUST-1. Subsequently, flexible composite polymer electrolytes (CPEs) were constructed via a solution-casting approach upon the incorporation of Li-IL@HKUST-1 with PEO. The as-synthesized CPE membrane showed a high ionic conductivity of 1.20 × 10–4 S cm–1 at 30 °C compared to 9.76 × 10–6 S cm–1 for the PEO-only electrolyte. Furthermore, the assembled LiFePO4/Li solid-state batteries delivered a stable reversible capacity of 136.2 mAh g–1 with a capacity retention of 92% after 100 cycles at a high current density of 1 C (60 °C). The excellent electrochemical performance was mainly attributed to the combination of Li-IL@HKUST-1 and the PEO matrix, which effectively reinforced the polymer matrix and facilitated the fast transport of lithium ions. The present research provides an effective strategy for building high-performance all-solid-state lithium batteries.
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