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1Scalable,thin asymmetric composite solid electrolyte for high-performance all-solid-state lithium metal batteries显示文摘All-solid-state Li metal batteries(ASSLMBs)have been considered the most promising candidates for next-generation energy storage devices owing to their high-energy density and safety.However,some obstacles such as thick solid electrolyte(SSEs)and unstable interface between the solid-state electrolytes(SSEs)and the electrodes have restricted the practical application of ASSLBs.Here,the scalable polyimide(PI)film reinforced asymmetric ultrathin(~20μm)composite solid electrolyte(AU-CSE)with a ceramic-rich layer and polymer-rich layer is fabricated by a both-side casting method and rolling process.The ceramic-rich layer not only acts as a“securer”to inhibit the lithium dendrite growth but also redistributes Li-ions uniform deposition,while the polymer-rich layer improves the compatibility with cathode materials.As a result,the obtained AU-CSE demonstrates an ionic conductivity of 1.44×10^(−4)S cm^(−1)at 35°C.The PI-reinforced AU-CSE enables Li/Li symmetric cell stable cycling over 1200 h at_(0.2)mA cm^(−2)and_(0.2)mAh cm^(−2).Li/LiNi_(0.6)Co_(0.2)Mn_(0.2)O2 and Li/LiFePO4 ASSLMBs achieve superior performances at 35°C.This study provides a new way of solving the interface problems between SSEs and electrodes and developing high-energy-density ASSLMBs for practical applications.Guoxu Wang Yuhao Liang Hong Liu Chao Wang Dabing Li Li-Zhen Fan 2022Interdisciplinary Materials2022,1,3:0
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