Prussian Blue Analogue with Fast Kinetics Through Electronic Coupling for Sodium Ion Batteries

Ping Nie, Jiaren Yuan, Jie Wang, Zaiyuan Le, Guiyin Xu, Liang Hao, Gang Pang, Yuting Wu, Hui Dou, Xiaohong Yan, Xiaogang Zhang

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

Alternative battery systems based on the chemistry of sodium are being considered to offer sustainability and cost-effectiveness. Herein, a simple and new method is demonstrated to enable nickel hexacyanoferrate (NiHCF) Prussian blue analogues (PBA) nanocrystals to be an excellent host for sodium ion storage by functionalization with redox guest molecule. The method is achieved by using NiHCF PBA powders infiltrated with the 7,7,8,8-tetracyanoquinododimethane (TCNQ) solution. Experimental and ab initio calculations results suggest that TCNQ molecule bridging with Fe atoms in NiHCF Prussian blue analogue leads to electronic coupling between TCNQ molecules and NiHCF open-framework, which functions as an electrical highway for electron motion and conductivity enhancement. Combining the merits including high electronic conductivity, open framework structure, nanocrystal, and interconnected mesopores, the NiHCF/TCNQ shows high specific capacity, fast kinetics and good cycling stability, delivering a high specific capacity of 35 mAh g-1 after 2000 cycles, corresponding a capacity loss of 0.035% decay per cycle.

Original languageEnglish
Pages (from-to)20306-20312
Number of pages7
JournalACS Applied Materials and Interfaces
Volume9
Issue number24
DOIs
Publication statusPublished - 2017 Jun 21
Externally publishedYes

Keywords

  • Prussian blue analogue
  • TCNQ
  • electronic coupling
  • fast kinetics
  • sodium ion batteries

ASJC Scopus subject areas

  • Materials Science(all)

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