Access to high-performance Li-rich layered oxide cathodes via ammonium phosphate surface treatment

Xiaobao Huang; Ding Zhang; Shoudong Xu; Liang Chen; Xiaochuan Duan

doi:10.1039/d3cc01214j

Access to high-performance Li-rich layered oxide cathodes via ammonium phosphate surface treatment

Chem Commun (Camb). 2023 May 2;59(36):5379-5382. doi: 10.1039/d3cc01214j.

Authors

Xiaobao Huang¹, Ding Zhang^{1

2}, Shoudong Xu¹, Liang Chen¹, Xiaochuan Duan^{1

3}

Affiliations

¹ College of Chemical Engineering and Technology, Taiyuan University of Technology, No. 79 Yingze West Street, Taiyuan, 030024, P. R. China. [email protected].
² School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, 430205, P. R. China. [email protected].
³ College of Chemistry, Taiyuan University of Technology, No. 79 Yingze West Street, Taiyuan, 030024, P. R. China.

PMID: 37060128
DOI: 10.1039/d3cc01214j

Abstract

Ammonium phosphate ((NH₄)₃PO₄) has been first used as a surface treatment reagent for Li-rich cathode materials. Compared to the conventional surface treatment, the samples treated with (NH₄)₃PO₄ exhibit an ultra-high initial Coulomb efficiency of 98.0% and excellent cycling stability. This is mainly attributed to the simultaneous construction of surface integrated structures, including oxygen vacancies, spinel phases, and Li₃PO₄ coating. This study demonstrates the effectiveness of ammonium phosphate surface treatment and provides a new idea for designing other cathode materials.