分离器(采油)
法拉第效率
材料科学
电解质
阳极
化学工程
离子电导率
电导率
快离子导体
纳米技术
电极
化学
热力学
物理
工程类
物理化学
作者
Yuncong Pang,Min Guan,Yilan Pan,Mao Tian,Kai Huang,Chunzhi Jiang,Andrew Xiang,Xinquan Wang,Yongji Gong,Yong Xiang,Xiaokun Zhang
出处
期刊:Small
[Wiley]
日期:2022-06-02
卷期号:18 (26)
被引量:3
标识
DOI:10.1002/smll.202104832
摘要
The practical application of the Li metal anode (LMA) is hindered by its low coulombic efficiency and dendrite formation. Although solid-state electrolytes hold promise as ideal partners for LMA, their effectiveness is limited by the poor workability and ionic conductivity. Herein, a modified separator combining the rapid Li+ transport of a liquid electrolyte and the interfacial stability of a solid-state electrolyte is explored to realize stable cycling of the LMA. A conformal nanolayer of LiPON is coated on a polypropylene separator by a scalable magnetron sputtering method, which is compatible with current Li-ion battery production lines and promising for the practical applications. The resulting LMA-electrolyte/separator interface is Li+ -conductive, electron-insulating, mechanically and chemically stable. Consequently, Li|Li cells maintain stable dendrite-free cycling with overpotentials of 10 and 40 mV over 2000 h at 1 and 5 mA cm-2 , respectively. Additionally, the Li|LiFePO4 full cells achieve a capacity retention of 92% after 550 cycles, confirming its application potential.
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