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Nucleation and Growth Mechanism of Anion‐Derived Solid Electrolyte Interphase in Rechargeable Batteries
Author(s) -
Yan Chong,
Jiang LiLi,
Yao YuXing,
Lu Yang,
Huang JiaQi,
Zhang Qiang
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202100494
Subject(s) - nucleation , electrolyte , crystallization , electrochemistry , chemical engineering , anode , interphase , ion , phase (matter) , isothermal process , materials science , chemical physics , chemistry , thermodynamics , electrode , organic chemistry , physics , biology , engineering , genetics
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.