不同正极材料的锂离子电池容量特性分析

Analysis of different cathode materials of lithium-ion battery capacity characteristics

容量作为表征锂离子电池剩余寿命的重要参数,是目前国内外学者研究的重要内容之一。为了更全面地分析锂离子电池容量特性,选取了两种不同正极材料的锂离子电池作为研究对象并进行容量特性的相关实验,探究了正极材料、放电倍率、电池温升、环境温度和循环次数等五个参数对电池放电容量的影响,进一步分析了引起锂离子电池容量衰减的内部机理。实验结果表明,相比于磷酸铁锂电池,镍钴锰三元锂离子电池对温度和放电倍率更敏感。

The capacity is an important parameter to characterize of the remaining life of the lithium-ion battery,which is one of the important study parts for scholars at home and abroad.Two kinds of anode materials of lithium-ion batteries were chosen to conduct related experiments of capacity characteristics.The effect of five parameters which are anode material,discharge rate,battery temperature rise,environmental temperature and cycle times on the batteries discharge capacity was explored.The internal mechanism of lithium-ion battery capacity fading was analyzed.The experimental results show that compared with the LiFePO4battery,the nickel-cobalt-manganese three elements lithium-ion battery is more sensitive to temperature and discharge rate.