LiVOPO4-Modified Lithium-Rich Layered Composite Cathodes for High-Performance Lithium-Ion Batteries

Tongxin Li*, Donglin Li, Wei Zhang, Xiangze Kong, Peiqi Zhang, Xuqiang Ren, Qingbo Zhang, Jianhang Gao, Xiaoyong Fan, Lei Gou

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Li-rich layered oxide Li1.2Ni0.13Co0.13Mn0.54O2 (LNCMO) is a promising cathode material for high-energy-density lithium-ion batteries (LIBs). However, it suffers from severe capacity fading and voltage decay, especially at high voltage (>4.5 V). In this study, we successfully design an active LiVOPO4 (LVOP) coating on the LNCMO surface. The LNCMO/LVOP composites exhibit enhanced rate capability and largely improved cycling stability during long-term cycling. Such superior performances can be attributed to the active LVOP coating layer, which can suppress the parasitic reactions between the LNCMO surface and the electrolyte. This work shows the potential for designing Li-rich layered composite cathode materials by coating the active phase for high energy/power LIBs.

Original languageEnglish
Pages (from-to)532-538
Number of pages7
JournalCHEMELECTROCHEM
Volume8
Issue number3
Early online date4 Jan 2021
DOIs
Publication statusPublished - 1 Feb 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • lithium-rich cathodes
  • LiVOPO4
  • rate capability
  • cycling stability
  • batteries
  • ENHANCED ELECTROCHEMICAL PERFORMANCE
  • HIGH-CAPACITY
  • SURFACE MODIFICATION
  • STRUCTURAL-CHANGES
  • OXYGEN LOSS
  • LI
  • OXIDE
  • PHOSPHATE
  • LI1.2NI0.13CO0.13MN0.54O2
  • LI1.2NI0.2MN0.6O2

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