材料科学
集电器
阴极
石墨
腐蚀
原电池
锂(药物)
箔法
电偶腐蚀
电偶阳极
电化学
冶金
电池(电)
金属锂
复合材料
化学工程
阴极保护
电气工程
电极
阳极
工程类
电解质
医学
化学
物理化学
内分泌学
功率(物理)
物理
量子力学
作者
Yimei Li,Qiang Guo,Yong Wu,Danfeng Ying,Yanan Yu,Tengsheng Chi,Shengjie Xia,Xufeng Zhou,Zhaoping Liu
标识
DOI:10.1002/adfm.202214523
摘要
Abstract The employment of ultra‐thin lithium metal anode with high loading cathode is the key to realizing high‐energy‐density rechargeable lithium batteries. Ultra‐thin lithium foils are routinely loaded on a copper substrate in batteries, however, the close contact of these two metals causes galvanic corrosion in the presence of electrolyte, which results in irreversible consumption of lithium and decomposition of electrolyte. Herein, a lightweight and highly conductive flexible graphite paper (GP) is applied to replace Cu foil as the current collector for lithium metal anode. It is demonstrated that the application of GP prevents galvanic corrosion and maintains intimate and steady contact between Li foil and GP current collector during cycling, thereby improving the electrochemical performance of the battery. A 1.08 Ah pouch cell assembled with Li@GP anode and LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode exhibits a long lifetime of 240 cycles with a capacity retention of 91.6% under limited Li, high cathode loading and lean electrolyte conditions.
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