Dipole-Dipole Interaction Induced Electrolyte Interfacial Model to Stabilize Antimony Anode for High-Safety Lithium-Ion Batteries
- Authors
- Sun, Qujiang; Cao, Zhen; Ma, Zheng; Zhang, Junli; Cheng, Haoran; Guo, Xianrong; Park, Geon-Tae; Li, Qian; Xie, Erqing; Cavallo, Luigi; Sun, Yang Kook; Ming, Jun
- Issue Date
- Oct-2022
- Publisher
- American Chemical Society
- Citation
- ACS Energy Letters, v.7, no.10, pp.3545 - 3556
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS Energy Letters
- Volume
- 7
- Number
- 10
- Start Page
- 3545
- End Page
- 3556
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185236
- DOI
- 10.1021/acsenergylett.2c01408
- ISSN
- 2380-8195
- Abstract
- Electrolyte plays a vital role in determining battery performances, while the effect of solvent molecular interaction on electrode performances is not fully understood yet. Herein, we present an unrevealed dipole-dipole interaction to show the mechanism of solvent interaction effect on stabilizing the electrolyte for high electrode performances. As a paradigm, a new nonflammable triethyl phosphate (TEP)-based electrolyte is designed to stabilize the bulk alloying anode (e.g., Sb), where an interfacial model is constructed according to the solvation structure induced by the dipole-dipole interaction between TEP and the essential 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (HFE). We demonstrate that the Li+-solvent-anion complexes derived from different solvation structures exhibit different kinetic and electrochemical properties, contributing to varied Sb anode performances in different electrolytes. As a result, a high lithium storage capacity of 656 mAh g-1, robust rate capacities over 4 A g-1, and a long lifespan of more than 100 cycles are achieved, which are better than those reported before. This work presents a different insight into understanding electrolyte effects on electrode performances and provides a guideline for electrolyte design to stabilize alloying anodes and beyond in metal-ion batteries.
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