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

Journal Article · · Advanced Energy Materials
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  1. Soochow Univ., Suzhou (China). Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Lab. for Carbon‐Based Functional Materials and Devices
  2. Argonne National Lab. (ANL), Lemont, IL (United States)

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 high-power 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 mu m 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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-06CH11357; 51972219; DE‐AC02‐06CH11357
OSTI ID:
1605902
Alternate ID(s):
OSTI ID: 1595871
Journal Information:
Advanced Energy Materials, Vol. 10, Issue 8; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

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