A highly-stable layered Fe/Mn-based cathode with ultralow strain for advanced sodium-ion batteries

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

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Author(s)

  • Rui Qi
  • Mihai Chu
  • Wenguang Zhao
  • Ziwei Chen
  • Lei Liao
  • Shisheng Zheng
  • Xiping Chen
  • Lei Xie
  • Tongchao Liu
  • Lei Jin
  • Khalil Amine
  • Feng Pan
  • Yinguo Xiao

Detail(s)

Original languageEnglish
Article number106206
Journal / PublicationNano Energy
Volume88
Online published31 May 2021
Publication statusPublished - Oct 2021
Externally publishedYes

Abstract

Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems, on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na0.65Li0.08Cu0.08Fe0.24Mn0.6O2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g−1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.

Research Area(s)

  • Co-substitution strategy, Fe- and Mn-based layered oxide cathodes, Lattice strain, Sodium-ion battery, Solid-solution reaction

Citation Format(s)

A highly-stable layered Fe/Mn-based cathode with ultralow strain for advanced sodium-ion batteries. / Qi, Rui; Chu, Mihai; Zhao, Wenguang; Chen, Ziwei; Liao, Lei; Zheng, Shisheng; Chen, Xiping; Xie, Lei; Liu, Tongchao; Ren, Yang; Jin, Lei; Amine, Khalil; Pan, Feng; Xiao, Yinguo.

In: Nano Energy, Vol. 88, 106206, 10.2021.

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