Ultrathin LiV2O4 Layers Modified LiNi0.5Co0.2Mn0.3O2 Single-Crystal Cathodes with Enhanced Activity and Stability

被引：54

作者：

Lu, Yao ^{[1
]}

Zeng, Xifeng ^{[1
]}

Wang, Jun ^{[2
]}

Yang, Lishan ^{[1
,3
]}

Hu, Shuai ^{[1
]}

Jia, Chuankun ^{[4
]}

Zhao, Haihong ^{[1
]}

Yin, Dulin ^{[1
]}

Ge, Xingbo ^{[5
]}

Xi, Xiaoming ^{[6
]}

机构：

[1] Hunan Normal Univ, Natl & Local Joint Engn Lab New Petrochem Mat & F, Key Lab Chem Biol & Tradit Chinese Med Res, Minist Educ China, Changsha 410081, Hunan, Peoples R China

[2] Shenzhen Univ, Coll Optoelect Engn, Lab 2D Mat Optoelect Sci & Technol, SZU NUS Collaborat Ctr & Int Collaborat, Shenzhen 518060, Guangdong, Peoples R China

[3] Hunan Normal Univ, Key Lab Assembly & Applicat Organ Funct Mol Hunan, Changsha 410081, Hunan, Peoples R China

[4] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China

[5] Southwest Petr Univ, Sch Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China

[6] Changsha Res Inst Min & Met Co Ltd, Changsha 410012, Hunan, Peoples R China

来源：

ADVANCED MATERIALS INTERFACES | 2019年 / 6卷 / 22期

基金：

中国国家自然科学基金;

关键词：

cycling stability; LiNi0; 5Co(0); 2Mn(0); 3O(2); LiV2O4; coating; polarization; single crystal; ELECTROCHEMICAL PERFORMANCE; THERMAL-STABILITY; CYCLING PERFORMANCE; VANADIUM RECOVERY; ION BATTERY; LICOO2; CATALYSTS; AL2O3; MICROSPHERES; MOLYBDENUM;

D O I：

10.1002/admi.201901368

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nickel-cobalt-manganese ternary cathode materials for lithium-ion batteries are prone to detrimental side reactions and deterioration performance at deep charge. Coating is one of the effective methods to boost electrochemical performance of materials. This work conducts an ultrathin LiV2O4 layer on the single-crystal LiNi0.5Co0.2Mn0.3O2 (NCM523) particles and scrutinizes the optimal coating amount. It turns out that 0.3 wt% LiV2O4-modified NCM523 cathode achieves a reversible discharging capacity of 131.2 mAh g(-1) after 100 cycles (3.0-4.5 V vs Li/Li+), with a capacity retention of 80% (which is 50% higher than that of the pristine sample). The experimental data suggest that this lithium vanadate coating technique provides an innovative strategy to boost the performance of NCM cathodes.

引用

页数：8

共 56 条

[1] Voltage Fade of Layered Oxides: Its Measurement and Impact on Energy Density [J].