A Prussian Blue/Zinc Secondary Battery with a Bio-Ionic Liquid–Water Mixture as Electrolyte
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- 作者：Zhen Liu ; Giridhar Pulletikurthi ; Frank Endres
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2016
- 出版时间：May 18, 2016
- 年：2016
- 卷：8
- 期：19
- 页码：12158-12164
- 全文大小：486K
- 年卷期：0
- ISSN：1944-8252
文摘
The development of rechargeable zinc ion batteries with high capacity and high cycling stability is a great challenge in aqueous solution due to hydrogen evolution and dendritic growth of zinc. In this study, we present a zinc ion secondary battery, comprising a metallic zinc anode, a bio-ionic liquid–water electrolyte, and a nanostructured prussian blue analogue (PBA) cathode. Both the Zn anode and the PBA cathode exhibit good compatibility with the bio-ionic liquid-water electrolyte, which enables the electrochemical deposition/dissolution of zinc at the zinc anode, and reversible insertion/extraction of Zn2+ ions at the PBA cathode. The cell exhibits a well-defined discharge voltage plateau of ∼1.1 V with a specific capacity of about 120 mAh g–1 at a current of 10 mA g–1 (∼0.1 C). The Zn anode shows great reversibility, and dendrite-free Zn deposits were obtained after 100 deposition/dissolution cycles. The integration of an environmentally friendly PBA cathode, a nontoxic and low-cost Zn anode, and a biodegradable ionic liquid–water electrolyte provides new perspective to develop rechargeable zinc ion batteries for various applications in electric energy storage.