摘要
锂离子电池在我国电动汽车等领域中被广泛应用,因此,加强其性能的研究具有重要意义。本文通过高浓度水热法合成LiMn_(1/3)Fe_(2/3)PO_(4)/C复合正极材料;利用SEM、X-ray对其进行表征分析;采用首次充放电、循环伏安等方法测试该材料的电化学性能。制备所得的LiMn_(1/3)Fe_(2/3)PO_(4)/C复合材料在0.1 C时,第1圈的充、放电比容量分别为160.3 mAh g^(-1)、153.3 mAh g^(-1),库伦效率为95.66%;循环47圈后,放电比容量为137.6 mAh g^(-1),容量保持率为89.75%。实验结果表明,该方法制备得到的材料循环稳定性较为优异,使用寿命较长,是较理想的锂离子电池正极材料。
Lithium-ion battery was widely used in electric vehicles and other fields in China;the research on improving its performance is of great significance.In this reaserch,LiMn_(1/3)Fe_(2/3)PO_(4)/C composite was synthesized by high concentration hydrothermal method and characterized by scanning electron microscopy and x-ray diffraction.The electrochemical properties of LiMn_(1/3)Fe_(2/3)PO_(4)/C were tested by galvanostatic charge/discharge and cyclic voltammetry.The first charge/discharge capacities were 160.3 mAh g^(-1)and 153.3 mAh g^(-1)at 0.1 C,the couloumbic efficiency was 95.66%.After 47 cycles,the discharge capacity was still 137.6 mAh g^(-1),and the capacity retention rate was 89.75%.The experimental results showed that the material prepared by this method has excellent cycle stability and long service life,and is an ideal anode material for lithium ion battery.
作者
穆志娇
易宗慧
杨学
王子婕
马莉
柳芸
金洋洋
Mu Zhi-jiao;Yi Zong-hui;Yang Xue;Wang Zi-jie;Ma Li;Liu Yun;Jin Yang-yang(College of Chemistry and Chemical Engineering,Ningxia Normal University,Guyuan Ningxia 756099,China)
出处
《江西化工》
CAS
2023年第5期80-83,共4页
Jiangxi Chemical Industry
基金
宁夏师范学院2022年度大学生科技创新基金项目(Z202213)
宁夏师范学院2022年度大学生科技创新基金项目(Z202218)
自治区级大学生创新创业训练计划项目(S202210753009)。
关键词
锂离子电池
正极材料
高浓度水热法
电化学性能
lithium-ionbattery
cathode materials
high concentration hydrothermal method
electrochemical properties
