Sodium-rich iron hexacyanoferrate with nickel doping as a high performance cathode for aqueous sodium ion batteries

Jie Wang, Changhuan Mi, Ping Nie, Shengyang Dong, Shengyang Tang, Xiaogang Zhang

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Na-rich NaxFeFe(CN)6 (NFF) in terms of low cost and high theoretical capacity has been considered to be a potential cathode material for aqueous sodium ion batteries (SIBs). However, low sodium content, poor Columbic efficiency (CE) and rapid capacity degradation impede their practical application. Herein, the effect of low-level Ni doping in NFF as cathode materials in 1 M NaNO3 electrolyte has been investigated, which were synthesized via a citrate-assisted co-precipitation route. NFF substituted with 23% Ni2+ exhibited the best electrochemical behaviors, which delivers a discharge capacity of 105.9 mAh g−1 at 200 mA g−1 and 73.1% capacity retention over 1000 cycles with an average CE of 99.8% at 1000 mA g−1. A reversible capacity of 55.5 mAh g−1 can be obtained even at a high current density of 2000 mA g−1. The Ni substitution strategy was evidenced to be a scalable method to prepare promising cathode materials with excellent cycling stability for high-performance aqueous SIBs.

本文言語English
ページ(範囲)10-18
ページ数9
ジャーナルJournal of Electroanalytical Chemistry
818
DOI
出版ステータスPublished - 2018 6 1
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 化学工学(全般)
  • 電気化学

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