Work

Research on the temperature radius stratification model based on electrochemical-thermal-force coupling in Lithium-ion batteries

Year: 2025

Type: article

Abstract: Lithium-ion battery (LIB) aging is crucial for performance and safety. This study uses an electrochemical-thermal-mechanical (ETM) coupling model with the temperature-radius stratification method to investigate aging behavior and capacity attenuation under high-rate charging/discharging. It focuses on SEI formation/distribution, thermal dynamics, diffusion-induced stress (DIS), and cut-off voltage impacts. As C-rate rises, heat generation increases, reducing heat dissipation efficiency and thermal stability, with the positive electrode degrading more severely. Uneven SEI distribution and concentration accelerate capacity attenuation. Positive electrode has higher von Mises stress and lower lithium ion concentration. Adjusting cut-off voltages can mitigate capacity loss. This study offers a framework for optimizing battery design and strategies, with future research suggested on complex aging factors.

Source: Electrochemistry Communications

DOI: 10.1016/j.elecom.2025.108052

Authors: Tengfei Long, Yun Guo

Institution: Shanghai University of Engineering Science

Language: English

Topic: Advanced Battery Technologies Research

Subfield: Automotive Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,630