钕离子掺杂锰酸锂纳米颗粒的自蔓延燃烧制备与性能研究  

Self-propagation combustion preparation and properties of neodymium ion-doped lithium manganate nanoparticles

作　　者：张庆堂[1] 朱永芳 胡晓俊 ZHANG Qing-tang;ZHU Yong-fang;HU Xiao-jun(College of Petrochemical Technology,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2023年第1期69-73,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(21968016,21466020)。

摘　　要：采用自蔓延燃烧法制备钕离子掺杂锰酸锂(LiMn_(1.99)Nd_(0.01)O_(4))纳米颗粒,通过XRD、SEM、CV等表征分析了材料的晶体结构、微观形貌和电化学性能.结果表明:钕离子掺杂不影响晶体结构,但可减小LiMn2O4颗粒粒径,进而提高其电化学性能.在0.2C倍率下的放电比容量高达125.6 mAh·g^(-1).在1C倍率下的首次放电容量为118.4 mAh·g^(-1),循环100次后的放电比容量为110.4 mAh·g^(-1),容量保持率为93.2%.A neodymium ion-doped lithium manganate(LiMn_(1.99)Nd_(0.01)O_(4))nanoparticle was prepared using the self-propagation combustion method.The crystal structure,microscopic morphology,and electrochemical performance of the material were characterized by XRD,SEM,and CV.The results show that neodymium ion doping does not affect the crystal structure,but can reduce the particle size of LiMn2O4particles,thereby improving its electrochemical performance.The discharge specific capacity at 0.2C is as high as 125.6 mAh·g^(-1).The initial discharge capacity at 1C is 118.4 mAh·g^(-1),and the discharge-specific capacity after 100 cycles is 110.4 mAh·g^(-1).The capacity retention rate is 93.2%.

关 键 词：自蔓延燃烧 锰酸锂 正极材料 锂离子电池 

分 类 号：O646[理学—物理化学]