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Air-Stable Lithium Spheres Produced by Electrochemical Plating
Tingting Yang1, Peng Jia1, Qiunan Liu1
1Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
Angewandte Chemie (International Ed. in English)
|August 1, 2018
Summary
Researchers developed air-stable lithium spheres (ASLSs) for advanced lithium batteries. These spheres have a protective lithium carbonate shell, enabling safe handling and use as high-capacity anodes.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium metal anodes offer high energy density for next-generation batteries.
- The high reactivity of lithium metal with air limits its practical application and transport.
Purpose of the Study:
- To develop a method for creating air-stable lithium metal spheres.
- To investigate the structure, stability, and electrochemical performance of these novel lithium spheres.
Main Methods:
- Electrochemical plating of lithium metal under a CO2 atmosphere.
- Characterization using aberration-corrected environmental transmission electron microscopy.
- Electrochemical testing in lithium-ion battery configurations.
Main Results:
- Successfully produced air-stable lithium spheres (ASLSs) with a core-shell structure (Li core, Li2CO3 shell).
- ASLSs demonstrated stability in ambient air, resisting reaction with moisture.
- Electrochemical performance of ASLSs was comparable to metallic lithium, indicating good Li+ conductivity of the shell.
Conclusions:
- The Li2CO3 shell effectively passivates the lithium core, providing air stability.
- ASLSs are a promising alternative for handling and utilizing lithium metal anodes in batteries.
- The protective shell is stable in air and water, facilitating practical battery applications.
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