Simultaneously Dual Modification of Ni-Rich Layered Oxide Cathode for High-Energy Lithium-Ion Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Huiping Yang
  • Hong-Hui Wu
  • Mingyuan Ge
  • Lingjun Li
  • Yifei Yuan
  • Qi Yao
  • Jie Chen
  • Lingfeng Xia
  • Jiangming Zheng
  • Zhaoyong Chen
  • Junfei Duan
  • Kim Kisslinger
  • Wah-Keat Lee
  • Qiaobao Zhang
  • Jun Lu

Detail(s)

Original languageEnglish
Article number1808825
Journal / PublicationAdvanced Functional Materials
Volume29
Issue number13
Publication statusPublished - 28 Mar 2019
Externally publishedYes

Abstract

A critical challenge in the commercialization of layer-structured Ni-rich materials is the fast capacity drop and voltage fading due to the interfacial instability and bulk structural degradation of the cathodes during battery operation. Herein, with the guidance of theoretical calculations of migration energy difference between La and Ti from the surface to the inside of LiNi 0.8 Co 0.1 Mn 0.1 O 2 , for the first time, Ti-doped and La 4 NiLiO 8 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes are rationally designed and prepared, via a simple and convenient dual-modification strategy of synchronous synthesis and in situ modification. Impressively, the dual modified materials show remarkably improved electrochemical performance and largely suppressed voltage fading, even under exertive operational conditions at elevated temperature and under extended cutoff voltage. Further studies reveal that the nanoscale structural degradation on material surfaces and the appearance of intergranular cracks associated with the inconsistent evolution of structural degradation at the particle level can be effectively suppressed by the synergetic effect of the conductive La 4 NiLiO 8 coating layer and the strong TiO bond. The present work demonstrates that our strategy can simultaneously address the two issues with respect to interfacial instability and bulk structural degradation, and it represents a significant progress in the development of advanced cathode materials for high-performance lithium-ion batteries.

Research Area(s)

  • DFT calculation, dual-modification strategy, lithium-ion batteries, Ni-rich materials, synchronous synthesis

Bibliographic Note

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Citation Format(s)

Simultaneously Dual Modification of Ni-Rich Layered Oxide Cathode for High-Energy Lithium-Ion Batteries. / Yang, Huiping; Wu, Hong-Hui; Ge, Mingyuan et al.

In: Advanced Functional Materials, Vol. 29, No. 13, 1808825, 28.03.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review