A bifunctional LaF3 doping strategy achieving coupled bulk and interfacial reconstruction for Ni-rich cathodes

Sihan Li; Yunhai Zhang; Le Zhao; Huimin Ji; Zhouhao Fu; Jie Tan; Jun Bao; Yixin Li; Qi Zhang; Yougen Tang; Haiyan Wang

doi:10.1039/D5CC02013A

A bifunctional LaF₃ doping strategy achieving coupled bulk and interfacial reconstruction for Ni-rich cathodes†

Sihan Li,‡^a Yunhai Zhang,‡^a Le Zhao,^a Huimin Ji,^a Zhouhao Fu,^a Jie Tan,^a Jun Bao,

^b Yixin Li,^c Qi Zhang,

*^a Yougen Tang

^a and Haiyan Wang

^a

Author affiliations

* Corresponding authors

^a Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, P. R. China
E-mail: qzhang1027@csu.edu.cn

^b National Synchrotron Radiation Laboratory, IRFEL Innovation Center for Energy Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China

^c Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China

Abstract

A one-step LaF₃ doping strategy achieves La-rich bulk and F-rich surface modification in Ni-rich cathodes. La incorporation enhances lattice rigidity and suppresses irreversible phase transition. Surface-enriched F forms a stable LiF layer, reducing side reactions. This bifunctional approach endows lithium-ion batteries with excellent cycling stability and high-rate performance.

Chemical Communications

A bifunctional LaF₃ doping strategy achieving coupled bulk and interfacial reconstruction for Ni-rich cathodes†

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A bifunctional LaF₃ doping strategy achieving coupled bulk and interfacial reconstruction for Ni-rich cathodes

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Chemical Communications