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Organic electrolyte-based rechargeable zinc-ion batteries using potassium nickel hexacyanoferrate as a cathode material

Organic electrolyte-based rechargeable zinc-ion batteries using potassium nickel hexacyanoferrate as a cathode material
Chae, MS[Chae, Munseok S.]Heo, JW[Heo, Jongwook W.]Kwak, HH[Kwak, Hunho H.]Lee, H[Lee, Hochun]Hong, ST[Hong, Seung-Tae]
DGIST Authors
Chae, MS[Chae, Munseok S.]; Heo, JW[Heo, Jongwook W.]; Kwak, HH[Kwak, Hunho H.]; Lee, H[Lee, Hochun]Hong, ST[Hong, Seung-Tae]
Issue Date
Journal of Power Sources, 337, 204-211
Article Type
CathodesCrystal StructureElectric BatteriesElectric DischargesElectrodesElectrolytesIon BatteriesIonsMultivalent-Ion BatteryNickelNickel HexacyanoferrateNon-AqueousNon-Aqueous Zinc BatteryPrussian BlueSecondary BatteriesZincZinc-Ion BatteryZinc Ions
This study demonstrates an organic electrolyte-based rechargeable zinc-ion battery (ZIB) using Prussian blue (PB) analogue potassium nickel hexacyanoferrate K0.86Ni[Fe(CN)6]0.954(H2O)0.766 (KNF-086) as the cathode material. KNF-086 is prepared via electrochemical extraction of potassium ions from K1.51Ni[Fe(CN)6]0.954(H2O)0.766 (KNF-151). The cell is composed of a KNF-086 cathode, a zinc metal anode, and a 0.5 M Zn(ClO4)2 acetonitrile electrolyte. This cell shows a reversible discharge capacity of 55.6 mAh g−1 at 0.2 C rate with the discharge voltage at 1.19 V (vs. Zn2+/Zn). As evidenced by Fourier electron density analysis with powder XRD data, the zinc-inserted phase is confirmed as Zn0.32K0.86Ni[Fe(CN)6]0.954(H2O)0.766 (ZKNF-086), and the position of the zinc ion in ZKNF-086 is revealed as the center of the large interstitial cavities of the cubic PB. Compared to KNF-086, ZKNF-086 exhibits a decreased unit cell parameter (0.9%) and volume (2.8%) while the interatomic distance of d(Fe-C) increased (from 1.84 to 1.98 Å), and the oxidation state of iron decreases from 3 to 2.23. The organic electrolyte system provides higher zinc cycling efficiency (>99.9%) than the aqueous system (ca. 80%). This result demonstrates an organic electrolyte-based ZIB, and offers a crucial basis for understanding the electrochemical intercalation chemistry of zinc ions in organic electrolytes. © 2016 Elsevier B.V.
Elsevier B.V.
Related Researcher
  • Author Lee, Ho Chun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
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Energy Science and EngineeringDiscovery Lab(Batteries & Materials Discovery Laboratory)1. Journal Articles
Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles

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