Optimizing transition metal ion ratio of LiNi0.5+xCo0.2+yMn0.3+zO2 (x+y+z=0) by simplex and normalization combined method

被引:11
作者
Cui, Xiaoling [1 ,2 ]
Wang, Shengxian [1 ]
Mao, Liping [1 ]
Wang, Peng [1 ]
Li, Zhaojuan [1 ]
Wang, Shimin [1 ]
Li, Shiyou [1 ,2 ]
机构
[1] Lanzhou Univ Technol, Coll Petrochem Technol, 36 Pengjiaping Rd, Lanzhou 730050, Gansu, Peoples R China
[2] Qinghai Green Grass New Energy Technol Co Ltd, Qinghai Res Ctr Low Temp Lithium Ion Battery Tech, Xining 810000, Peoples R China
关键词
LiNi0.5Co0.2Mn0.3O2; Cathode; Simplex method; Transition metal ions; Evaluation index normalization; LINI0.5CO0.2MN0.3O2 CATHODE MATERIAL; ELECTROCHEMICAL PERFORMANCE; CO-SUBSTITUTION; LITHIUM; EVOLUTION; NI; MICROSPHERES; BATTERY; MN;
D O I
10.1016/j.electacta.2020.135709
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Optimizing the ratio of transition metal (TM) ions is an effective modification strategy to improve the electrochemical properties of LiNi0.5+xCo0.2+yMn0.3+zO2 (x + y + z = 0, and the absolute values of x, y and z are not more than 0.03). In this work, we develope a new method which combines the simplex method with the normalization method of evaluation index (SNEI) to optimize the TM ion ratio of LiNi0.5+xCo0.2+yMn0.3+zO2. This method can significantly improve the optimization efficiency. Only after three times of simplex operation, the optimum component of LiNi0.493Co0.214Mn0.293O2 is obtained. The results show that the electrochemical properties of material have improved significantly through adjustment of the ratio of TM ions slightly, and LiNi0.493Co0.214Mn0.293O2-based cells exhibit long cycle life and good rate capability due to the low degree of Li/Ni mixing and the slow increase of impedance during cycling. Simultaneously, the impact of the intensity of the TM ion ratio on electrochemical performances are studied, and the following trend is observed in decreasing the sensitivity of the evaluation indexes: cycle performance > rate capacity > specific capacity. This newly-developed SNEI method has a wide applicability and great prospects in electrolyte and electrode formulations. (C) 2020 Elsevier Ltd. All rights reserved.
引用
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页数:11
相关论文
共 35 条
[1]   High-performance lithium ion batteries using SiO2-coated LiNi0.5Co0.2Mn0.3O2 microspheres as cathodes [J].
Chen, Chao ;
Tao, Tao ;
Qi, Wen ;
Zeng, Hong ;
Wu, Ying ;
Liang, Bo ;
Yao, Yingbang ;
Lu, Shengguo ;
Chen, Ying .
JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 709 :708-716
[2]   High-voltage electrochemical performance of LiNi0.5Co0.2Mn0.3O2 cathode material via the synergetic modification of the Zr/Ti elements [J].
Chen, Yongxiang ;
Li, Yunjiao ;
Li, Wei ;
Cao, Guolin ;
Tang, Shuyun ;
Su, Qianye ;
Deng, Shiyi ;
Guo, Jia .
ELECTROCHIMICA ACTA, 2018, 281 :48-59
[3]   Enhanced electrochemical properties of the Cd-modified LiNi0.6Co0.2Mn0.2O2 cathode materials at high cut-off voltage [J].
Chen, Yongxiang ;
Li, Yunjiao ;
Tang, Shuyun ;
Lei, Tongxing ;
Deng, Shiyi ;
Xue, Longlong ;
Cao, Guolin ;
Zhu, Jie .
JOURNAL OF POWER SOURCES, 2018, 395 :403-413
[4]   Electrochemical Degradation Mechanism and Thermal Behaviors of the Stored LiNi0.5Co0.2Mn0.3O2 Cathode Materials [J].
Chen, Zhiqiang ;
Liu, Chaoyue ;
Sun, Guiyan ;
Kong, Xiangbang ;
Lai, Shaobo ;
Li, Jiyang ;
Zhou, Rong ;
Wang, Jing ;
Zhao, Jinbao .
ACS APPLIED MATERIALS & INTERFACES, 2018, 10 (30) :25454-25464
[5]   Enhanced electrochemical properties of LiNi0.6Co0.2Mn0.2O2 cathode material by the diffusional Al2O3 coating layer [J].
Cui, Xiaoling ;
Ai, Ling ;
Mao, Liping ;
Xie, Yingchun ;
Liang, Youwei ;
Zhang, Ningshuan ;
Feng, Yaohua ;
Wang, Shengxian ;
Li, Shiyou .
IONICS, 2019, 25 (02) :411-419
[6]   Nickel-Rich Layered Microspheres Cathodes: Lithium/Nickel Disordering and Electrochemical Performance [J].
Fu, Chaochao ;
Li, Guangshe ;
Luo, Dong ;
Li, Qi ;
Fan, Jianming ;
Li, Liping .
ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (18) :15822-15831
[7]   Surface/Interfacial Structure and Chemistry of High-Energy Nickel-Rich Layered Oxide Cathodes: Advances and Perspectives [J].
Hou, Peiyu ;
Yin, Jiangmei ;
Ding, Meng ;
Huang, Jinzhao ;
Xu, Xijin .
SMALL, 2017, 13 (45)
[8]   Mg-Al-B co-substitution LiNi0.5Co0.2Mn0.3O2 cathode materials with improved cycling performance for lithium-ion battery under high cutoff voltage [J].
Hu, Guorong ;
Zhang, Manfang ;
Liang, Longwei ;
Peng, Zhongdong ;
Du, Ke ;
Cao, Yanbing .
ELECTROCHIMICA ACTA, 2016, 190 :264-275
[9]   Structural and electrochemical properties of Mg-doped nickel based cathode materials LiNi0.6Co0.2Mn0.2-xMgxO2 for lithium ion batteries [J].
Huang, Zhenjun ;
Wang, Zhixing ;
Zheng, Xiaobo ;
Guo, Huajun ;
Li, Xinhai ;
Jing, Qun ;
Yang, Zhihua .
RSC ADVANCES, 2015, 5 (108) :88773-88779
[10]   Influence of Co substitution for Ni and Mn on the structural and electrochemical characteristics of LiNi0.5Mn1.5O4 [J].
Ito, Atsushi ;
Li, Decheng ;
Lee, Yunsung ;
Kobayakawa, Koichi ;
Sato, Yuichi .
JOURNAL OF POWER SOURCES, 2008, 185 (02) :1429-1433