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Corresponding Author

Yong YANG(yyang@xmu.edu.cn)

Abstract

Nickel-rich ternary materials with large reversible capacity as well as high operating voltage are considered as the most promising candidate for next generation lithium-ion batteries (LIBs). However, the inferior cycle stability and thermal stability have limited their widely commercial applications. Concentration gradient design of Ni-Co-Mn/Al ternary concentration gradient materials have been extensively studied in the past decade, which can ensure high cycle capacity while maintaining excellent cycle stability. In this paper, the latest research progresses in Ni-Co-Mn/Al ternary concentration gradient materials for LIBs are reviewed. Firstly, we summarize the different synthesis methods of ternary concentration-gradient materials, especially focusing on the research directions towards core-shell concentration gradient (CSCG) materials and full concentration gradient (FCG) ternary materials. In addition, this review also introduces the structural characterizations for concentration gradient ternary materials and reveals the reasons for their performance improvements. Finally, we discuss the current challenges of CSCG and FCG materials in the industrialization and display possible solutions to address them.

Graphical Abstract

Keywords

lithium-ion batteries, ternary concentration gradient material, core-shell concentration gradient, full concentration gradient

Publication Date

2020-02-28

Online Available Date

2019-01-15

Revised Date

2019-01-04

Received Date

2018-10-11

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