Heteroatom-Substituted P2-Na2/3Ni1/4Mg1/12Mn2/3OCathode with {010} Exposing Facets Boost Anionic Activity and High-Rate Performance for Na-Ion Batteries

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

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Author(s)

  • Liuyun Zhang
  • Chaohong Guan
  • Yangyang Xie
  • Aonan Wang
  • Shilei Chang
  • Jingqiang Zheng
  • Yanqing Lai
  • Zhian Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)18313-18323
Journal / PublicationACS Applied Materials and Interfaces
Volume14
Issue number16
Online published14 Apr 2022
Publication statusPublished - 27 Apr 2022

Abstract

As an attractive cathode candidate for sodium-ion batteries, P2-type Na2/3Ni1/3Mn2/3Ois famous for its high stability in humid air, attractive capacity, and high operating voltage. However, the low Natransport kinetics, oxygen-redox reactions, and irreversible structural evolution at high-voltage areas hinder its practical application. Herein, a comprehensive study of a microbar P2-type Ni2/3Ni1/4Mg1/12Mn2/3Omaterial with {010} facets is presented, which exhibits high reversibility of structural evolution and anionic redox activity, leading to outstanding rate capability and cyclability. The notable rate performance (53 mA h g-1at 20 C, 2.0-4.3 V) contributed to the high exposure of {010} facets via controlling the growth orientation of the precursor, which is certified by density functional theory calculation and lattice structural analysis. Mg substitution strengthens the reversibility of anionic oxygen redox and structural evolution in high-voltage areas that was confirmed by the in situ X-ray diffraction and ex situ X-ray photoelectron spectroscopy tests, leading to outstanding cyclic reversibility (68.9% after 1000 cycles at 5 C) and slowing down the voltage fading. This work provides new insights into constructing electrochemically active planes combined with heteroatom substitution to improve the Natransport kinetics and structural stability of layered oxide cathodes for sodium storage.

Research Area(s)

  • anionic activity, energy storage, layered oxides, Na2/3Ni1/3Mn2/3O2, sodium-ion batteries, {010} planes

Citation Format(s)

Heteroatom-Substituted P2-Na2/3Ni1/4Mg1/12Mn2/3OCathode with {010} Exposing Facets Boost Anionic Activity and High-Rate Performance for Na-Ion Batteries. / Zhang, Liuyun; Guan, Chaohong; Xie, Yangyang; Li, Huangxu; Wang, Aonan; Chang, Shilei; Zheng, Jingqiang; Lai, Yanqing; Zhang, Zhian.

In: ACS Applied Materials and Interfaces, Vol. 14, No. 16, 27.04.2022, p. 18313-18323.

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