Nucleation and Growth Mechanism of Anion‐Derived Solid Electrolyte Interphase in Rechargeable Batteries
- 25 January 2021
- journal article
- research article
- Published by Wiley in Angewandte Chemie
- Vol. 60 (15), 8521-8525
- https://doi.org/10.1002/anie.202100494
Abstract
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.Keywords
Funding Information
- National Natural Science Foundation of China (21825501 and 51702117)
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