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DOI	10.1039/c8ee00378e
	Aqueous: Vs. nonaqueous Zn-ion batteries: Consequences of the desolvation penalty at the interface
	Kundu D.; Hosseini Vajargah S.; Wan L.; Adams B.; Prendergast D.; Nazar L.F.
发表日期	2018
ISSN	17545692
起始页码	881
结束页码	892
卷号	11 期号:4
英文摘要	Zinc ion batteries using metallic zinc as the negative electrode have gained considerable interest for electrochemical energy storage, whose development is crucial for the adoption of renewable energy technologies, as zinc has a very high volumetric capacity (5845 mA h cm-3), is inexpensive and compatible with aqueous electrolytes. However, the divalent charge of zinc ions, which restricts the choice of host material due to hindered solid-state diffusion, can also pose a problem for interfacial charge transfer. Here, we report our findings on reversible intercalation of up to two Zn2+ ions in layered V3O7·H2O. This material exhibits very high capacity and power (375 mA h g-1 at a 1C rate, and 275 mA h g-1 at an 8C rate) in an aqueous electrolyte compared to a very low capacity and slow rate capabilities in a nonaqueous medium. Operando XRD studies, together with impedance analysis, reveal solid solution behavior associated with Zn2+-ion diffusion within a water monolayer in the interlayer gap in both systems, but very sluggish interfacial charge transfer in the nonaqueous electrolyte. This points to desolvation at the interface as a major factor in dictating the kinetics. Temperature dependent impedance studies show high activation energies associated with the nonaqueous charge transfer process, identifying the origin of poor electrochemical performance. © 2018 The Royal Society of Chemistry.
英文关键词	Activation energy; Charge transfer; Diffusion in solids; Electric batteries; Electrolytes; Renewable energy resources; Zinc; Charge transfer process; Electrochemical energy storage; Electrochemical performance; High activation energy; Interfacial charge transfer; Non-aqueous electrolytes; Renewable energy technologies; Solid-state diffusion; Ions; alternative energy; aqueous solution; diffusion; electrochemical method; electrode; electrolyte; fuel cell; performance assessment
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190281
作者单位	Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada; Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Joint Center for Energy Storage Research (JCESR), United States
推荐引用方式 GB/T 7714	Kundu D.,Hosseini Vajargah S.,Wan L.,et al. Aqueous: Vs. nonaqueous Zn-ion batteries: Consequences of the desolvation penalty at the interface[J],2018,11(4).
APA	Kundu D.,Hosseini Vajargah S.,Wan L.,Adams B.,Prendergast D.,&Nazar L.F..(2018).Aqueous: Vs. nonaqueous Zn-ion batteries: Consequences of the desolvation penalty at the interface.Energy & Environmental Science,11(4).
MLA	Kundu D.,et al."Aqueous: Vs. nonaqueous Zn-ion batteries: Consequences of the desolvation penalty at the interface".Energy & Environmental Science 11.4(2018).