Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

Fangfang Wang, Ruoyu Hong, Xuesong Lu, Huiyong Liu, Yuan Zhu, Ying Zheng, David Hui

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Abstract

The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g-1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.
Original languageEnglish
Pages (from-to)210-220
Number of pages11
JournalNanotechnology Reviews
Volume10
Issue number1
DOIs
Publication statusPublished - 20 Apr 2021

Keywords

  • cathode material
  • LiNiCoAlO
  • lithium-ion battery
  • ZnO coating

ASJC Scopus subject areas

  • Biotechnology
  • Medicine (miscellaneous)
  • Materials Science (miscellaneous)
  • Energy Engineering and Power Technology
  • Engineering (miscellaneous)
  • Process Chemistry and Technology

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