期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 15, 页码 8521-8525出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202100494
关键词
interfacial chemistry; isothermal electrochemical crystallization; nucleation and growth mechanism; solid electrolyte interphase; two-dimension (2D) growth
资金
- National Natural Science Foundation of China [21825501, U1932220, 51702117]
- National Key Research and Development Program [2016YFA0202500]
- Department of Science and Technology of Jilin Province [20180520014JH]
- Tsinghua University Initiative Scientific Research Program
- National Postdoctoral Program for Innovative Talents [BX20200176]
Research on solid electrolyte interphase (SEI) formation should focus on its nucleation and growth mechanism, especially the establishment of isothermal electrochemical crystallization theory to explain the process.
Solid electrolyte interphase (SEI) has been widely employed to describe the new phase formed between anode and electrolyte in working batteries. Significant advances have been achieved on the structure and composition of SEI as well as on the possible ion transport mechanism. However, the nucleation and growth mechanism of SEI catches little attention, which requires the establishment of isothermal electrochemical crystallization theory. Herein we explore the virgin territory of electrochemically crystallized SEI. By using potentiostatic method to regulate the decomposition of anions, an anion-derived SEI forms on graphite surface at atomic scale. After fitting the cur-rent-time transients with Laviron theory and Avrami formula, we conclude that the formation of anion-derived interface is surface reaction controlled and obeys the two-dimensional (2D) progressive nucleation and growth model. Atomic force microscope (AFM) images emphasize the conclusion, which reveals the mystery of isothermal electrochemical crystallization of SEI.
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