Potassium titanium hexacyanoferrate as a cathode material for potassium-ion batteries

In this study, potassium titanium hexacyanoferrate (K0.3Ti0.75Fe0.25[Fe(CN)6]0.95·2.8H2O) was obtained by a simple co-precipitation and used as a cathode material in potassium-ion batteries (KIBs) for the first time. The reversible redox couples of Fe and Ti could provide 136.7 mA h g−1 at 50 mA g−1...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 2018-11, Vol.122, p.31-35
Main Authors: Luo, Yushan, Shen, Bolei, Guo, Bingshu, Hu, Linyu, Xu, Qiuju, Zhan, Renming, Zhang, Youquan, Bao, Shujuan, Xu, Maowen
Format: Article
Language:English
Subjects:
Cathode
Nanoparticle
Potassium-ion battery
Prussian blue analogue
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Summary:In this study, potassium titanium hexacyanoferrate (K0.3Ti0.75Fe0.25[Fe(CN)6]0.95·2.8H2O) was obtained by a simple co-precipitation and used as a cathode material in potassium-ion batteries (KIBs) for the first time. The reversible redox couples of Fe and Ti could provide 136.7 mA h g−1 at 50 mA g−1 and 113 mA h g−1 at 100 mA g−1 in the first discharge. Considering that this material is easy to synthesize, with low cost and good electrochemical performance, our results suggest the possible development of KIBs as cathodes and future research into rechargeable KIBs. •PBA analogues K0.3Ti0.75Fe0.25[Fe(CN)6]0.95·2.8H2O synthesized via a facile method.•First use of K0.3Ti0.75Fe0.25[Fe(CN)6]0.95·2.8H2O as a cathode in potassium-ion batteries.•Good reversible capacity and rate performance.•Unique performance attributable to nanostructure and Ti-ion.
ISSN:0022-3697
1879-2553
DOI:10.1016/j.jpcs.2018.06.014