：Protection of Li metal anode by surface-coating of PVDF thin film to enhance the cycling performance of Li batteries论文

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作者（2019）在《Protection of Li metal anode by surface-coating of PVDF thin film to enhance the cycling performance of Li batteries》一文中研究指出：Lithium metal, the ideal anode material for next-generation high-energy batteries, suffers from the severe safety problem of Li dendrites. Herein, we report a simple approach to effectively maintain the morphology of Li-metal anode and enhance the cycling performance of Li batteries by surface coating of a porous polyvinylidene fluoride （PVDF） thin film. In symmetrical cells testing, the cells with the Li@PVDF electrode display stable cycling performance more than 1300 h （650 cycles） at the current density of 0.5 mA/cm2 with a stripping/plating capacity of 0.5 mAh/cm2. The results with full cells employing Li@PVDF anode and LiFePO4 cathode show a good cycling ability with a capacity retention of 80.0% after 500 cycles at 4 C and an excellent rate capability with a high capacity of 78.4 mAh/g even at a high rate of 10 C.

Abstract

Lithium metal, the ideal anode material for next-generation high-energy batteries, suffers from the severe safety problem of Li dendrites. Herein, we report a simple approach to effectively maintain the morphology of Li-metal anode and enhance the cycling performance of Li batteries by surface coating of a porous polyvinylidene fluoride （PVDF） thin film. In symmetrical cells testing, the cells with the Li@PVDF electrode display stable cycling performance more than 1300 h （650 cycles） at the current density of 0.5 mA/cm2 with a stripping/plating capacity of 0.5 mAh/cm2. The results with full cells employing Li@PVDF anode and LiFePO4 cathode show a good cycling ability with a capacity retention of 80.0% after 500 cycles at 4 C and an excellent rate capability with a high capacity of 78.4 mAh/g even at a high rate of 10 C.

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