Co-Doping of Al3+ and Ti4+ and Electrochemical Properties of LiNiO2 Cathode Materials for Lithium-Ion Batteries

被引：4

作者：

Wu, Jinmei ^{[1
]}

Yang, Jianwen ^{[1
]}

Zheng, Jiawei ^{[1
]}

Wang, Mengwen ^{[1
]}

Li, Shengxian ^{[1
]}

Huang, Bin ^{[1
]}

Li, Yanwei ^{[1
]}

Zhu, Qing ^{[1
]}

Chen, Quanqi ^{[1
]}

Xiao, Shunhua ^{[1
]}

Liu, Botian ^{[1
]}

机构：

[1] Guilin Univ Technol, Coll Chem & Bioengn, Guangxi Key Lab Electrochem & Magneto Chem Funct M, Guilin 541004, Peoples R China

来源：

CHEMSUSCHEM | 2023年 / 16卷 / 19期

基金：

中国国家自然科学基金;

关键词：

LiNiO2 cathode materials; co-doping with Al3+ and Ti4+; electrochemical properties; lithium-ion batteries; phase transition; NI; PERFORMANCE; TRANSITION; STABILITY; STORAGE; SURFACE;

D O I：

10.1002/cssc.202300607

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

LiNiO2 cathode material for lithium-ion batteries has the advantages of high specific capacity, abundant resources, and low cost, but it suffers from difficulties in preparation, structural instability, and serious capacity decay. In this work, highly pure and layered structural LiNi0.95AlaTi0.05-aO2 (a=0, 0.025, 0.05) cathode materials were synthesized by a simply sol-gel method. The cation mixing of Ni2+ and Li+, structural deterioration, irreversible conversion between H2 and H3 phases and unstable surface and CEI (Cathode-electrolyte interface) film can be effectively suppressed by co-doping with Al3+ and Ti4+. A preferred LiNi0.95Al0.025Ti0.025O2 sample provides a discharge specific capacity of 223 mAh g(-1) at 0.1 C and 148.32 mAh g(-1) at 5 C, a capacity retention of 72.7 % after 300 cycles at 1 C and a Li+ diffusion coefficient of about 2.0x10(-9) cm(2) s(-1).

引用

页数：7

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