气候变化领域集成服务门户(CCPortal): Initiating a mild aqueous electrolyte Co3O4/Zn battery with 2.2 V-high voltage and 5000-cycle lifespan by a Co(iii) rich-electrode

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DOI	10.1039/c8ee01415a
	Initiating a mild aqueous electrolyte Co3O4/Zn battery with 2.2 V-high voltage and 5000-cycle lifespan by a Co(iii) rich-electrode
	Ma L.; Chen S.; Li H.; Ruan Z.; Tang Z.; Liu Z.; Wang Z.; Huang Y.; Pei Z.; Zapien J.A.; Zhi C.
发表日期	2018
ISSN	17545692
起始页码	2521
结束页码	2530
卷号	11 期号:9
英文摘要	The Zn/Co3O4 battery is one of the few aqueous electrolyte batteries with a potential >2 V voltage. Unfortunately, so far, all reported Zn/Co3O4 batteries are using an alkaline electrolyte, resulting in poor cycling stability and environmental problems. Here, we report a Co(iii) rich-Co3O4 nanorod material with vastly improved electrochemical kinetics. Zn/Co(iii) rich-Co3O4 batteries can work well in ZnSO4 with a CoSO4 additive aqueous solution as a mild electrolyte, delivering a high voltage of 2.2 V, a capacity of 205 mA h g-1 (Co3O4) and an extreme cycling stability of 92% capacity retention even after 5000 cycles. Further mechanistic study reveals a conversion reaction between in situ formed CoO and Co3O4, which has never been observed in an alkaline Zn/Co3O4 battery. Subsequently, a flexible solid-state battery is constructed and reveals high flexibility and a high energy density of 360.8 W h kg-1 at a current density of 0.5 A g-1. Our research initiates the first Zn/Co3O4 battery working in a mild electrolyte, resulting in excellent electrochemical performance. It also indicates that the electrochemical kinetics can be effectively enhanced by fine tuning the atomic structure of electrode materials, opening a new door to improve the performance of aqueous electrolyte batteries. © 2018 The Royal Society of Chemistry.
英文关键词	Cobalt compounds; Electrochemical electrodes; Nanorods; Secondary batteries; Solid electrolytes; Solid state devices; Solutions; Zinc compounds; Alkaline electrolytes; Aqueous electrolyte; Conversion reactions; Electrochemical kinetics; Electrochemical performance; Environmental problems; High energy densities; Mechanistic studies; Sulfur compounds; aqueous solution; cobalt; electric field; electrochemistry; electrode; electrolyte; reaction kinetics; zinc
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/190127
作者单位	Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Hong Kong, 999077, Hong Kong; School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China; Shenzhen Research Institute, City University of Hong Kong, Nanshan District Shenzhen518057, Hong Kong
推荐引用方式 GB/T 7714	Ma L.,Chen S.,Li H.,et al. Initiating a mild aqueous electrolyte Co3O4/Zn battery with 2.2 V-high voltage and 5000-cycle lifespan by a Co(iii) rich-electrode[J],2018,11(9).
APA	Ma L..,Chen S..,Li H..,Ruan Z..,Tang Z..,...&Zhi C..(2018).Initiating a mild aqueous electrolyte Co3O4/Zn battery with 2.2 V-high voltage and 5000-cycle lifespan by a Co(iii) rich-electrode.Energy & Environmental Science,11(9).
MLA	Ma L.,et al."Initiating a mild aqueous electrolyte Co3O4/Zn battery with 2.2 V-high voltage and 5000-cycle lifespan by a Co(iii) rich-electrode".Energy & Environmental Science 11.9(2018).