电解质
材料科学
双功能
离子电导率
复合数
锂(药物)
化学工程
电池(电)
电化学窗口
电导率
无机化学
电极
有机化学
化学
复合材料
物理化学
催化作用
医学
功率(物理)
物理
量子力学
工程类
内分泌学
作者
Guolong Lu,Hongjin Wei,Chuanqi Shen,Feng Zhou,Min Zhang,Yihuang Chen,Huile Jin,Jun Li,Guang Chen,Jichang Wang,Shun Wang
标识
DOI:10.1021/acsami.2c13613
摘要
A highly stable composite electrolyte was developed in this research to address the performance decline over time in a solid lithium ion battery (SLIB). It involved the synthesis of bifunctional MOF material (MOF-2) from two different functionalized UiO-66 materials containing carboxyl groups and amine groups, respectively, and the subsequent blending of PEO (polyethylene oxide) with the MOF-2 to form the novel composite solid electrolyte (PEO-MOF-2). The composite electrolytes showed higher ionic conductivity (5.20 × 10-4 S/cm) than that of pristine PEO. The LiFePO4||Li cells constructed with PEO-MOF-2 exhibited 98.45% capacity retention with 149.92 mA h/g after 100 cycles operation at 1.0 C, which was higher than those cells prepared with pristine PEO electrolyte or with PEO-based electrolytes that were only doped by aminated MOF or carboxylated MOF. Furthermore, our experiments showed that there was about a 40% increase in the potential window (from 3.5 to 5.0 V) and 80% increase in the lithium ion transfer number (from 0.20 to 0.36 at 60 °C) as a result of replacing pristine PEO electrolyte with PEO-MOF-2.
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