Achieving High-Voltage and High-Capacity Aqueous Rechargeable Zinc Ion Battery by Incorporating Two-Species Redox Reaction

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Detail(s)

Original languageEnglish
Article number1902446
Journal / PublicationAdvanced Energy Materials
Volume9
Issue number45
Online published25 Oct 2019
Publication statusPublished - 6 Dec 2019

Abstract

Herein, a two-species redox reaction of Co(II)/Co(III) and Fe(II)/Fe(III) incorporated in cobalt hexacyanoferrate (CoFe(CN)6) is proposed as a breakthrough to achieve jointly high-capacity and high-voltage aqueous Zn-ion battery. The Zn/CoFe(CN)6 battery provides a highly operational voltage plateau of 1.75 V (vs metallic Zn) and a high capacity of 173.4 mAh g-1 at current density of 0.3 A g-1, taking advantage of the two-species redox reaction of Co(II)/Co(III) and Fe(II)/Fe(III) couples. Even under extremely fast charge/discharge rate of 6 A g-1, the battery delivers a sufficiently high discharge capacity of 109.5 mAh g-1 with its 3D opened structure framework. This is the highest capacity delivered among all the batteries using Prussian blue analogs (PBAs) cathode up to now. Furthermore, Zn/CoFe(CN)6 battery achieves an excellent cycling performance of 2200 cycles without any capacity decay at coulombic efficiency of nearly 100%. One further step, a sol-gel transition strategy for hydrogel electrolyte is developed to construct high-performance flexible cable-type battery. With the strategy, the active materials can adequately contact with electrolyte, resulting in improved electrochemical performance (≈ 18.73% capacity increase) and mechanical robustness of the solid-state device. It is believed that this study optimizes electrodes by incorporating multi redox reaction species for high-voltage and high-capacity batteries.

Research Area(s)

  • cobalt hexacyanoferrate, flexible, wearable, high capacity, high voltage, two-species redox reaction, DEFINED OPEN FRAMEWORK, PRUSSIAN BLUE ANALOG, COPPER HEXACYANOFERRATE, SODIUM, ELECTRODE, STORAGE, INTERCALATION, STATE

Citation Format(s)

Achieving High-Voltage and High-Capacity Aqueous Rechargeable Zinc Ion Battery by Incorporating Two-Species Redox Reaction. / Ma, Longtao; Chen, Shengmei; Long, Changbai; Li, Xinliang; Zhao, Yuwei; Liu, Zhuoxin; Huang, Zhaodong; Dong, Binbin; Zapien, Juan Antonio; Zhi, Chunyi.

In: Advanced Energy Materials, Vol. 9, No. 45, 1902446, 06.12.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal