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李彦光教授课题组及其合作者在Advanced Energy Materials上发表论文

发布时间:2021-07-04访问量:18设置

题目:

Fast-Charging and Ultrahigh-Capacity Lithium Metal Anode Enabled by Surface Alloying

作者:

Tianhui Xu,1 Peng Gao,1 Peirong Li,1 Kai Xia,1 Na Han,1 Jun Deng,1 Yanguang Li,*,1 and Jun Lu*,2

单位:

1Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional  Materials and Devices Soochow University Suzhou 215123, China

2 Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA.

摘要:

Li metal anodes are going through a great revival but they still encounter grand challenges. One often neglected issue is that most reported Li metal anodes are only cyclable under relatively low current density (<5 mA cm-2) and small areal capacity (<5 mAh cm-2), which essentially limits their highpower applications and results in ineffective Li utilization (<1%). Herein, it is reported that surface alloyed Li metal anodes can enable reversible cycling with ultrafast rate and ultralarge areal capacity. Low-cost Si wafers are used and are chemically etched down to 20-30 µm membranes. Simply laminating a Si membrane onto Li foil results in the formation of LixSi alloy film fused onto Li metal with mechanical robustness and high Li-ion conductivity. Symmetric cell measurements show that the surface alloyed Li anode has excellent cycling stability, even under high current density up to 25 mA cm-2 and unprecedented areal capacity up to 100 mAh cm-2. Furthermore, the surface alloyed Li anode is paired with amorphous MoS3 cathode and achieves remarkable full-cell performance.

影响因子:

24.884

分区情况:

一区

链接:



责任编辑:向丹婷

 


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