Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 77, Issue -, Pages 54-57Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2017.02.012
Keywords
Potassium-ion battery; Cathode; Prussian blue; Prussian white
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Funding
- National Science Foundation [1551693]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1551693] Funding Source: National Science Foundation
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We prepared Prussian white analogues-KxMFe(CN)(6)center dot mH(2)O (M = Fe, Co, Ni, or Cu). These compounds are investigated as cathode materials for potassium-ion batteries with a non-aqueous electrolyte. Each of these materials exhibits different K-ion storage properties with reversible capacity values ranging from 35 to 110 mAh g(-1), at high potentials above 3.2 V vs. K+/K. Among them, FeFe-Prussian white, K1.68Fe1.09Fe(CN)(6)center dot 2.1H(2)O, exhibits the highest reversible capacity of 110 mAh g(-1) and stable cycling performance in contrast to rapid capacity fading of other analogues. Our results demonstrate a remarkable potential of this family of cathode materials for the emerging potassium-ion batteries. (C) 2017 Elsevier B.V. All rights reserved.
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