摘要
随着锂电池发展进入成熟阶段,储能元件市场需求量不断激增,因此市面主流的锂电池性能的电化学性能成为了人们关注的重点,在锂离子电池当中正极材料对于锂电池性能的电化学性能尤为关键,其中三元材料(NCM)、磷酸铁锂(LFP)和锰酸锂(LMO)材料作为目前电动汽车、智能手机等移动设备的储能器件的主流正极材料,这三种材料在实际运用中会表现出不同的电化学特性,所显现出来的特殊性能也各有不同.通过对制作以三元材料、磷酸铁锂和锰酸锂作为正极材料的锂离子电池的电化学性能的分析,对比这三种材料的交流阻抗图谱(EIS)、充放电性能及长时间循环特性.实验结果表明:NCM材料在三组正极材料中的综合性能最好,首次放电比容量最大,达到了224.7 mAh/g,但是,LFP的循环性能和稳定性能比NCM和LMO更具优越性.
With the development of lithium batteries entering the mature stage,the market demand for energy storage components is increasing rapidly.The advantages of the mainstream lithium batteries on the market have drawn wide attention.For lithium batteries,cathode materials are of critical importance to the battery performance.Among them,ternary materials(NCM),lithium iron phosphate(LFP)and lithium manganese oxide(LMO)materials are the mainstream cathode materials for energy storage devices of electric vehicles,smartphones and other mobile devices.These three types of materials show different electrochemical characteristics and different special performance in practical application.Through analysis of the electrochemical performance of lithium-ion batteries with NCM,LFP and LMO cathode materials respectively,comparison is made among these three types of materials in terms of the AC electrochemical impedance spectroscopy(EIS),charge-discharge performance and long-term cycle characteristics.The experimental results show that the NCM material has the best comprehensive performance among the three groups of cathode materials.It has the largest first discharge specific capacity of 224.7 mAh/g.However,compared with NCM and LMO,LFP is more superior in terms of cycle performance and stability.
作者
曾帅波
陈烨
唐俊雄
潘惜园
彭静
郑浩荣
李涌仪
伍强
徐伟
ZENG Shuai-bo;CHEN-Ye;TANG Jun-xiong;PAN Xi-yuan;PENG Jing;ZHENG Hao-rong;LI Yong-yi;WU Qiang;XU Wei(School of Automobile and Transportation Engineering,Guangdong Polytechnic Normal University,Guangzhou Guangdong 510630)
出处
《广东技术师范大学学报》
2023年第3期53-58,共6页
Journal of Guangdong Polytechnic Normal University
基金
广东省基础与应用基础研究基金项目(2022A1515110102)
广州市科技计划项目(202201011098)
广东省教指委本科在线开放课程课题(2022ZXKC271)
广东省科技创新战略专项资金(大学生科技创新培育)项目(pdjh2023b0310)
教育部高等教育司产学研协同育人项目(202102211092)
广东技术师范大学校级科研项目人才专项(2021SDKYA105)
广东技术师范大学研究生教育创新计划项目资助.
