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Room-temperature sodium thermal reaction towards electrochemically active metals for lithium storage
Dan Shang1, Weiming Wu2, Yu Guo3
1Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education, School of Materials Science & Engineering, Beihang University, Beijing 100191, China; School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China.
Abstract:
Due to the superior capacity for lithium storage, metallic tin and germanium are considered as one of the candidate anodes for the next generation of lithium ion batteries. Herein, metallic tin and germanium particles are successfully prepared by using a mild replacement reaction between metallic sodium and the corresponding tetrachloride under room temperature. The as-obtained metals exhibit nanocrystals of several nanometers. Used as anode of lithium-ion batteries, the as-obtained metallic nanocrystals display improved cycling stability, superior rate performance and high reversible capacity as well. Furthermore, it provides a facile approach to fabricate other electrochemically active metallic nanocrystals by using this mild and environmental benignity replacement reaction.
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