# Decoupled measurement and modeling of interface reaction kinetics of ion-intercalation battery electrodes

Source: [Decoupled measurement and modeling of interface reaction kinetics of ion-intercalation battery electrodes](<https://www.sota2.com/research/paper/68fa421e1e209131ce8ffd52>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T03:38:09.340Z

Authors: Ruoyu Xiong, Mengyuan Zhou, Longhui Li, Jia Xu, Maoyuan Li, Bo Yan, Dequn Li, Yun Zhang, Huamin Zhou

Published: 2022-07-08T09:06:13.000Z

## Abstract

Ultrahigh rate performance of active particles used in lithium-ion battery electrodes has been revealed by single-particle measurements, which indicates a huge potential for developing high-power batteries. However, the charging/discharging behaviors of single particles at ultrahigh C-rates can no longer be described by the traditional electrochemical kinetics in such ion-intercalation active materials. In the meantime, regular kinetic measuring methods meet a challenge due to the coupling of interface reaction and solid-state diffusion processes of active particles. Here, we decouple the reaction and diffusion kinetics via time-resolved potential measurements with an interval of 1 ms, revealing that the classical Butler-Volmer equation deviates from the actual relation between current density, overpotential, and Li+ concentration. An interface ion-intercalation model is developed which considers the excess driving force of Li+ (de)intercalation in the charge transfer reaction for ion-intercalation materials. Simulations demonstrate that the proposed model enables accurate prediction of charging/discharging at both single-particle and electrode scales for various active materials. The kinetic limitation processes from single particles to composite electrodes are systematically revealed, promoting rational designs of high-power batteries.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2207.03762>)

[PDF](<https://arxiv.org/pdf/2207.03762.pdf>)