Inorganic Chemicals Industry ›› 2025, Vol. 57 ›› Issue (7): 14-23.doi: 10.19964/j.issn.1006-4990.2024-0360

• Reviews and Special Topics • Previous Articles     Next Articles

Research on improving electrochemical performance of Ni-rich cathode materials under fast-charging operation

DANG Jianmeng1(), ZHANG Zhichao1, CAO Zhongkai2, LI Zixuan2, SHEN Jixue2()   

  1. 1. Zhengzhou Railway Vocational Technical College,Zhengzhou 450018,China
    2. College of Chemistry and Materials Science,Hebei University,Baoding 071000,China
  • Received:2024-06-27 Online:2025-07-10 Published:2024-08-05
  • Contact: SHEN Jixue E-mail:380526237@qq.com;jixueshen@163.com

Abstract:

Electric vehicles(EVs) are emerging as a significant trend in modern transportation,primarily due to their low pollution levels and reduced energy consumption.This shift towards electrification is driven by the need to mitigate environmental impacts and enhance energy efficiency.However,one of the major challenges facing EVs is the prolonged charging time,which significantly diminishes their convenience compared to traditional internal combustion engine vehicles.To address this,lithium-ion batteries(LIBs) utilizing high-nickel ternary materials as cathodes have gained attention for their high energy density and superior rate performance.These characteristics enable EVs to achieve longer driving ranges and accommodate fast-charging capabilities,which are critical for widespread adoption.As the rapid development of EVs continues,a thorough understanding of the degradation mechanisms of high-nickel cathode materials under fast-charging conditions is crucial.Among the factors that lead to performance degradation,irreversible phase transitions,microcrack formation,and particle morphology changes are particularly detrimental to capacity retention.To mitigate these issues and improve the performance of high-nickel cathode batteries,several strategies have been employed,including optimizing particle structure,elemental doping,and surface coating.These approaches have shown promise in enhancing the durability and efficiency of high-nickel materials.The current knowledge on degradation mechanisms and effective modification strategies for high-nickel cathode materials were reviewed,and the future research directions were prospected to further improve their performance under fast-charging conditions.

Key words: lithium-ion battery, Ni-rich cathode, fast-charging operation, degradation mechanism, modification approach

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