Effect of Discharge Rate on Positive Active Material of Lead Carbon Battery for Energy Storage

3rd Annual International Workshop on Materials Science and Engineering

Chen, Kailun^1,2 ; Liu, Hao^2 ; Hu, Chen^2 ; Gao, Fei^2 ; Yang, Kai^2 ; Wang, Hao^1

Beijing University of Technology, No.100 Pingleyuan, Beijing, China^1

China Electric Power Research Institute, No.15 Xiaoying Rd(E), Qinghe Beijing, China^2

关键词: Active substance;    Capacity retention;    Charge and discharge;    Cycle performance;    Cycling performance;    Discharge rates;    Positive active materials;    State of charge;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/250/1/012057/pdf
DOI  :  10.1088/1757-899X/250/1/012057

来源: IOP

【 摘 要 】

Lead carbon battery has been widespread concern with its excellent performance of charge and discharge under High Rate Part State of Charge (HRPSoC) as well as its cycle performance. In this paper, the cycling performance of lead carbon battery for energy storage was tested by different discharge rate. The effects of different discharge rate on the composition and morphology of positive active materials in the cycle was studied by XRD and SEM. The effect of different discharge rate on the ohmic impedance of lead carbon battery was studied by testing Electrochemical Impedance Spectroscopy with different capacity retention rates. The results show that with the increase of the discharge rate, the content of PbO2in the positive active material increases, the active substance utilization and the particle size of PbO2crystal declines, and the ohmic impedance of the battery decreases.