Perspective—Potential Benefit of Li-Rich Cathode Materials: Reduction of Co and Ni Content Rather than Achievement of Ultra-High Capacities | Zendy

Roy Benedek | Zendy

Open Access

Perspective—Potential Benefit of Li-Rich Cathode Materials: Reduction of Co and Ni Content Rather than Achievement of Ultra-High Capacities

Author(s) -

Roy Benedek

Publication year - 2022

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1945-7111/ac69c3

Subject(s) - cathode , manganese , fade , materials science , coating , cycling , voltage , lithium (medication) , chemical engineering , capacity loss , electrochemistry , chemistry , nanotechnology , electrode , metallurgy , computer science , electrical engineering , medicine , archaeology , engineering , endocrinology , history , operating system

In the conventional cycling protocol for lithium and manganese rich NMC layered oxides (LMRNMC), the upper cutoff voltage Vcut is extended to ~ 4.8, to achieve capacities of ~ 250 mAh/g. With this mode of operation, structural rearrangements result in voltage fade upon cycling. A strategy is proposed to avoid these structural rearrangements based on (a) restricting Vcut to values < ~4.6 to shut down the bulk instabilities, and (b) application of a (preferably) semi-coherent coating that protects the surface oxygen. The potential benefit of this strategy would be to minimize Co and Ni content, compared to Ni-rich NMC.

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