离子电导率
电解质
碳酸丙烯酯
锂(药物)
过电位
电导率
快离子导体
化学工程
膜
材料科学
化学
无机化学
电化学
电极
工程类
物理化学
医学
内分泌学
生物化学
作者
Shijie Lu,Xiaorong Chu,Chunli Li,Zhikun Zhao,Jianxiong Xiao,Borong Wu,Daobin Mu
标识
DOI:10.1016/j.jpowsour.2022.232472
摘要
High ionic conductivity and good interface compatibility have always been two major bottlenecks for solid-state electrolytes. Herein, a composite electrolyte membrane comprising poly (propylene carbonate), PVDF-HFP and Li6·3La3Zr1·4Ta0·6O12 is successfully prepared via electrospinning. With the assistance of succinonitrile, the synthesized solid-state electrolyte exhibits high ionic conductivity (1.32 × 10−3 S cm−1 at room temperature), oxidation potential up to 4.5 V vs Li/Li+ and high Li+ transference number (0.81). This desirable performance is attributed to the combination of PPC with good Li+ conduction ability and PVDF-HFP with excellent mechanical properties, forming a continuous transport framework within the electrolyte. The introduced active fillers and small molecular additive not only benefit to fast Li+ mobility, but also reinforce the stability towards Li metal. Li symmetric cell using the solid-state electrolyte can last for 800 h at a current density of 1.0 mA cm−2 with a low overpotential. The NCM811 cell using the electrolyte membrane shows high initial discharge specific capacity (184.3 mAh g−1 at 1 C) and good capacity retention (80.1% after 300 cycles at 30 °C).
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