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

Albert L. Lipson | Zendy; Jessica L. Durham | Zendy; Michael LeResche | Zendy; Ismael Abu-Baker | Zendy; Michael J. Murphy | Zendy; Timothy T. Fister | Zendy; Lixin Wang | Zendy; Fu Zhou | Zendy; Lei Liu | Zendy; Kitae Kim | Zendy; Derek C. Johnson | Zendy

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

Author(s) -

Albert L. Lipson,

Jessica L. Durham,

Michael LeResche,

Ismael Abu-Baker,

Michael J. Murphy,

Timothy T. Fister,

Lixin Wang,

Fu Zhou,

Lei Liu,

Kitae Kim,

Derek C. Johnson

Publication year - 2020

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.0c01448

Subject(s) - coprecipitation , materials science , dopant , calcination , thermal stability , cathode , doping , chemical engineering , ion , battery (electricity) , chemistry , optoelectronics , thermodynamics , catalysis , organic chemistry , engineering , power (physics) , physics

Increasing the Ni content of LiNi x Mn y Co 1- x - y O 2 (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.

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