材料科学
电解质
纳米孔
金属锂
化学工程
吸附
多孔性
锂(药物)
扩散
金属
固态
电极
无机化学
纳米技术
复合材料
物理化学
化学
热力学
内分泌学
工程类
冶金
物理
医学
作者
Wenwen Li,Sanpei Zhang,Bangrun Wang,Sui Gu,Dong Xu,Jianing Wang,Chunhua Chen,Zhaoyin Wen
标识
DOI:10.1021/acsami.8b06574
摘要
Solid polymer electrolytes (SPEs) have shown extraordinary promise for all-solid-state lithium metal batteries with high energy density and flexibility but are mainly limited by low ionic conductivity and their poor stability with lithium metal anodes. In this work, we propose a highly ordered porous electrolyte additive derived from SSZ-13 for high-rate all-solid-state lithium metal batteries. The nanoporous adsorption effect provided by the highly ordered porous nanoparticles in the poly(ethylene oxide) (PEO) electrolyte is found to significantly improve the Li+ conductivity (1.91 × 10-3 S cm-1 at 60 °C, 4.43 × 10-5 S cm-1 at 20 °C) and widen the electrochemical stability window to 4.7 V vs Li+/Li. Meanwhile, the designed PEO-based electrolyte demonstrates enhanced stability with the lithium metal anode. Through systematically increasing Li+ diffusion, widening the electrochemical stability window, and enhancing the interfacial stability of the SSZ-composite electrolyte (CPE) electrolyte, the LiFePO4/SSZ-CPE/Li cell is optimized to deliver high rate capability and stable cycling performance, which demonstrates great potential for all-solid-state energy storage application.
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