As the demand for lithium-ion batteries increases, a better understanding of the complex phenomena involved in their operation becomes crucial. In this work, we propose a coupled thermo-chemo-mechanical model for electrode particles of Li–ion batteries. To this end, we start with a general finite strain continuum framework for the coupled thermo-chemo-mechanical problem and then narrow it down to cathode active particles of Li–ion batteries, particularly to lithium manganese oxide particles. Electrochemical kinetics at the surface of the particle and also heat generation due to current exchange are taken into account. Next, the numerical treatment of the problem using the finite element method is presented. Specific line elements are needed to evaluate the flux of ions at the surface of the particle. Finally, the performance of the proposed model is evaluated using a few representative boundary value problems.

随着对锂离子电池的需求的增加，更好地理解其操作中涉及的复杂现象变得至关重要。在这项工作中，我们提出了锂离子电池电极颗粒的热化学-机械耦合模型。为此，我们从解决热化学机械耦合问题的通用有限应变连续框架开始，然后将其范围缩小到锂离子电池的阴极活性颗粒，特别是锂锰氧化物颗粒。考虑了颗粒表面的电化学动力学以及由于电流交换而产生的热量。接下来，提出了使用有限元方法对该问题进行数值处理的方法。需要特定的线元素来评估粒子表面的离子通量。最后，