Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (8): 40-46.doi: 10.19964/j.issn.1006-4990.2021-0533

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress on doping modification of high nickel ternary nickel-cobalt-aluminum cathode material

HOU Shunli(),ZHAO Duan,ZHOU Geng,WEI Shishi,LI Jian,WANG Jiatai()   

  1. College of Physics and Electronic Information Engineering,Qinghai Normal University,Xining 810000,China
  • Received:2021-10-21 Online:2022-08-10 Published:2022-08-26
  • Contact: WANG Jiatai E-mail:exsun1997@foxmail.com;manvict@foxmail.com

Abstract:

Due to the high energy density,high working voltage,low cost and environmental friendliness,high nickel ternary nickel-cobalt-aluminum(NCA) cathode material is likely to become one of the next generation widely used cathode materials for lithium ion batteries.However,increasing of nickel content,resulting in more unstable material structure,reduced cycle performance,and rate capability,limits its further development.The modification mechanism of ion doping at different positions from four aspects: lithium site,transition metal site,oxygen site doping and composite co-doping were summarized.A large number of research results showed that modification by composite co-doping could effectively improve the electrochemical performance of nickel-cobalt-aluminum cathode materials by combining the advantages of single ion doping.

Key words: NCA cathode material, ion doping modification, capacity decay mechanism, electrochemical performance

CLC Number: