Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

The synergistic regulation of the built-in electric field and interface effect is applied in this work to solve problems of poor rate performance and short cycle life caused by low reaction kinetics and lattice expansion. Constructing heterostructures is considered an effective way to change the ele...

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Bibliographic Details
Published in:ACS sustainable chemistry & engineering 2024-06, Vol.12 (24), p.9078-9090
Main Authors: Chen, Tianrui, Wu, Yao, Zhang, Haibang, He, Xuannan, Zhu, Zhiwen, Wei, Ying, Li, Cuiyun, Zhu, Hua, Yu, Shijin, Dong, Wen
Format: Article
Language:English
Subjects:
anodes
density functional theory
diffusivity
electric field
electron transfer
energy
green chemistry
heat treatment
lithium batteries
reaction kinetics
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Summary:The synergistic regulation of the built-in electric field and interface effect is applied in this work to solve problems of poor rate performance and short cycle life caused by low reaction kinetics and lattice expansion. Constructing heterostructures is considered an effective way to change the electric field distribution and generate rich interfaces. Fe2O3/MoO2/Fe2(MoO4)3 anode materials with heterostructures have been successfully synthesized by electrospinning combined with subsequent heat treatment. The sample obtained at 600 °C (FMO-600) exhibits excellent cyclic stability and rate performance. The capacity retention rate of the FMO-600 electrode is as high as 79.75% (986.6 mAh·g–1 after 450 cycles at 1 A·g–1), and the average specific capacity barely drops by 0.045% per cycle. It is important to note that even at a high current density of 5 A·g–1, the FMO-600 electrode still exhibits an impressive specific capacity (615.6 mAh·g–1). Density functional theory (DFT) computations theoretically prove the formation of built-in electric fields. The higher Li+ diffusion coefficient and lower electron transfer resistance of the FMO-600 electrode enhance the reaction kinetics during discharge/charge processes, while the interface effect contributes to outstanding cycling stability. This work sheds light on the rational design of high energy/power density lithium-ion battery anode materials.
ISSN:2168-0485
2168-0485
DOI:10.1021/acssuschemeng.4c01146