Electrochemical performance of NaFeFe(CN)6 prepared by solid reaction for 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)

  • Wan Tang
  • Yingying Xie
  • Fangwei Peng
  • Yang Yang
  • Fan Feng
  • Xiao-Zhen Liao
  • Yu-Shi He
  • Zi-Feng Ma
  • Zonghai Chen

Detail(s)

Original languageEnglish
Pages (from-to)A3910-A3917
Journal / PublicationJournal of the Electrochemical Society
Volume165
Issue number16
Publication statusPublished - 2018
Externally publishedYes

Link(s)

Abstract

Commercially available Na4Fe(CN)6 and Fe4[Fe(CN)6]3 are two cheap compounds that have ever been investigated as positive electrode materials for sodium-ion batteries. However, poor electronic conductivity of Na4Fe(CN)6 and sodium deficiency of Fe4[Fe(CN)6]3 prevent these two materials from being used in practical rechargeable sodium-ion batteries. In this paper, a NaFeFe(CN)6 cathode material was synthesized by ball milling the Fe4[Fe(CN)6]3/ Na4Fe(CN)6 mixture. The obtained NaFeFe(CN)6 demonstrated a single cubic phase indexed to Fm3m space group similar to Fe4[Fe(CN)6]3 but with larger lattice parameter due to the existence of Na+ in the lattice framework. The NaFeFe(CN)6 electrode delivered first desodiation capacity of 119.4 mAh g−1 and first sodiation capacity of 153.6 mAh g−1 at 0.05C rate. The NaFeFe(CN)6 showed excellent cycling stability with reversible capacities of 118.2 mAh g−1 and 96.8 mAh g−1 at 0.1C and 1C rate, respectively. In-situ XRD analyses demonstrated a single cubic phase process during charge-discharge of NaFeFe(CN)6 electrode. Low water content benefited from the solid reaction method and the homogenous single phase process during charge/discharge assured the stable long term cycling performance of the NaFeFe(CN)6 product.

Research Area(s)

Bibliographic Note

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Citation Format(s)

Electrochemical performance of NaFeFe(CN)6 prepared by solid reaction for sodium ion batteries. / Tang, Wan; Xie, Yingying; Peng, Fangwei; Yang, Yang; Feng, Fan; Liao, Xiao-Zhen; He, Yu-Shi; Ma, Zi-Feng; Chen, Zonghai; Ren, Yang.

In: Journal of the Electrochemical Society, Vol. 165, No. 16, 2018, p. A3910-A3917.

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