Improving the Thermal Stability of NMC 622 Li-Ion Battery Cathodes through Doping During Coprecipitation

被引：55
作者：
Lipson, Albert L. [1 ]
Durham, Jessica L. [1 ]
LeResche, Michael [1 ]
Abu-Baker, Ismael [1 ]
Murphy, Michael J. [1 ]
Fister, Timothy T. [2 ]
Wang, Lixin [3 ]
Zhou, Fu [3 ]
Liu, Lei [3 ]
Kim, Kitae [3 ]
Johnson, Derek [3 ]
机构：
[1] Argonne Natl Lab, Appl Mat Div, Lemont, IL 60439 USA
[2] Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA
[3] A123 Syst LLC, Waltham, MA 02451 USA
来源：
ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 16期
基金：
美国国家科学基金会;
关键词：
Li-ion Battery; cathode; safety; synchrotron XRD; thermal stability; doping; coprecipitation; HIGH TAP-DENSITY; ELECTROCHEMICAL PERFORMANCE; LINI0.6CO0.2MN0.2O2; CATHODE; NI; SUBSTITUTION;
D O I：
10.1021/acsami.0c01448
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Increasing the Ni content of LiNixMnyCo1-x-yO2 (NMC) cathodes can increase the capacity, but additional stability is needed to improve safety and longevity characteristics. In order to achieve this improved stability, Mg and Zr were added during the coprecipitation to uniformly dope the final cathode material. These dopants reduced the capacity of the material to some extent, depending on the concentration and calcination temperature. However, these dopants can impart substantial stabilization. It was found that the degree of stabilization is strongly dependent on the calcination temperature of the material. In addition, we used synchrotron X-ray diffraction during thermal breakdown to better understand why the different dopants impact the thermal stability and confirm the stabilization effects of the dopants.
引用
收藏
页码：18512 / 18518
页数：7
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