Chen Yong, Huo Weiwei, Lin Muyi, Zhao Li
Beijing Information Science and Technology University, Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, China.
State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China.
PLoS One. 2018 Jan 2;13(1):e0189757. doi: 10.1371/journal.pone.0189757. eCollection 2018.
An electrochemical Lithium ion battery model was built taking into account the electrochemical reactions. The polarization was divided into parts which were related to the solid phase and the electrolyte mass transport of species, and the electrochemical reactions. The influence factors on battery polarization were studied, including the active material particle radius and the electrolyte salt concentration. The results showed that diffusion polarization exist in the positive and negative electrodes, and diffusion polarization increase with the conducting of the discharge process. The physicochemical parameters of the Lithium ion battery had the huge effect on cell voltage via polarization. The simulation data show that the polarization voltage has close relationship with active material particle size, discharging rate and ambient temperature.
建立了一个考虑电化学反应的电化学锂离子电池模型。极化被分为与物种的固相和电解质质量传输以及电化学反应相关的部分。研究了电池极化的影响因素，包括活性材料颗粒半径和电解质盐浓度。结果表明，正负极均存在扩散极化，且扩散极化随放电过程的进行而增加。锂离子电池的物理化学参数通过极化对电池电压有巨大影响。模拟数据表明，极化电压与活性材料粒径、放电率和环境温度密切相关。
