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

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (1): 69-73.

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

张庆堂^*, 朱永芳, 胡晓俊

兰州理工大学石油化工学院, 甘肃兰州 730050

收稿日期:2021-10-20 出版日期:2023-02-28 发布日期:2023-03-21
通讯作者: 张庆堂(1976-),男,河南新野人,博士,教授. Email:zhqt137@lut.edu.cn
基金资助:
国家自然科学基金(21968016,21466020)

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

ZHANG Qing-tang, ZHU Yong-fang, HU Xiao-jun

College of Petrochemical Technology, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2021-10-20 Online:2023-02-28 Published:2023-03-21

摘要/Abstract

摘要： 采用自蔓延燃烧法制备钕离子掺杂锰酸锂(LiMn_1.99Nd_0.01O₄)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%.

关键词: 自蔓延燃烧, 锰酸锂, 正极材料, 锂离子电池

Abstract: A neodymium ion-doped lithium manganate(LiMn_1.99Nd_0.01O₄) 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 LiMn₂O₄ particles, 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%.

Key words: self-propagating combustion, lithium manganate, cathode material, lithium ion battery

中图分类号:

O646

张庆堂, 朱永芳, 胡晓俊. 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[J]. 兰州理工大学学报, 2023, 49(1): 69-73.

ZHANG Qing-tang, ZHU Yong-fang, HU Xiao-jun. Self-propagation combustion preparation and properties of neodymium ion-doped lithium manganate nanoparticles[J]. Journal of Lanzhou University of Technology, 2023, 49(1): 69-73.

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