Study on annealing treatment of spinel LiNi0.5Mn1.5O4 as cathode materials for high-voltage lithium-ion batteries

被引：15
作者：
Yang, Wei [1 ,2 ]
Chang, Longjiao [1 ,2 ]
Luo, Shaohua [3 ]
Bi, Xiaolong [1 ,2 ]
Cao, Shiyuan [1 ,2 ]
Wei, Anlu [1 ,2 ]
Liu, Jianan [1 ,2 ]
Zhang, Fusheng [1 ]
机构：
[1] Bohai Univ, Sch Chem & Mat Engn, Jinzhou 121013, Liaoning, Peoples R China
[2] Technol Res Ctr Silicon Mat, Liaoning Key Lab Engn, Jinzhou, Peoples R China
[3] Northeastern Univ Qinghuangdao, Sch Resources & Mat, Qinhuangdao 066004, Hebei, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ENERGY RESEARCH | 2022年 / 46卷 / 13期
基金：
中国国家自然科学基金;
关键词：
4 1 V voltage platform; annealing treatment; high-temperature solid-phase method; LiNi0; 5Mn1; 5O4; Lithium-ion batteries; POSITIVE-ELECTRODE MATERIALS; LI-ION; ELECTROCHEMICAL PERFORMANCE; PHOSPHO-OLIVINES; MN3+ CONTENT; LIMN2O4; COMPOSITES; STABILITY; CARBONATE; NANORODS;
D O I：
10.1002/er.8461
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The cathode material LiNi0.5Mn1.5O4 has drawn considerable attention for the high-voltage discharge platform, high power density, and environmental friendliness. However, Mn3+ inside the material leads to the generation of Ni-O impurities, which contributes to a 4.1 V voltage platform in the charge-discharge process. To overcome this phenomenon, spinel LiNi0.5Mn1.5O4 was prepared by a high-temperature solid-phase method in this article, and samples were annealed after that. Impacts of annealing treatment on properties of LiNi0.5Mn1.5O4 were studied and an effective annealing treatment method was proposed. The charge and discharge test shows that the sample treated by annealing at 600 degrees C for 8 h has the highest capacity (121 mAh/g) and the best cycle capacity retention rate (93.4%). XPS tests showed that the treatment by the annealing process significantly reduced the Mn3+ in the material and eliminated the 4.1 V voltage plateau, which indicates the best annealing process is treating at 600 degrees C for 8 h.
引用
收藏
页码：18495 / 18510
页数：16
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