Battery-like supercapacitors from diamond networks and water-soluble redox electrolytes

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	Battery-like supercapacitors from diamond networks and water-soluble redox electrolytes
	Yu, Siyu; Yang, Nianjun; Zhuang, Hao; Mandal, Soumen; Williams, Oliver A.; Yang, Bing; Huang, Nan; Jiang, Xin; Yang, NJ; Jiang, X (reprint author), Univ Siegen, Inst Mat Engn, D-57076 Siegen, Germany.
刊名	ROYAL SOC CHEMISTRY
	2017-01-28
卷号	5 期号:4 页码:1778-1785
ISSN号	2050-7488
英文摘要	Enhanced performance of electrochemical capacitors can be achieved by larger capacitances as well as higher power and energy densities. In this work, such battery-like supercapacitors were fabricated using a three-dimensional and conductive diamond network as the capacitor electrode and water-soluble redox couples as the electrolyte. In 0.05 M Fe(CN)(6)(3-/4-) + 1.0 M Na2SO4 aqueous solution, a capacitance of 73.42 mF cm(-2) was obtained at a current density of 1 mA cm(-2). This value is 10 000 times higher than the capacitance of diamond electric double layer capacitors (EDLCs). The energy and power densities of a fabricated diamond network symmetric pseudocapacitor were up to 56.50 W h kg(-1) and 13.7 kW kg(-1), respectively. Compared with those of diamond EDLCs obtained with the same cell voltage, they are enhanced about 3500 and 1440 fold, respectively. Therefore the combination of diamond networks and water-soluble redox electrolytes is a novel approach to construct electrochemical capacitors and thus bridges the gap between normal dielectric capacitors and rechargeable batteries.; Enhanced performance of electrochemical capacitors can be achieved by larger capacitances as well as higher power and energy densities. In this work, such battery-like supercapacitors were fabricated using a three-dimensional and conductive diamond network as the capacitor electrode and water-soluble redox couples as the electrolyte. In 0.05 M Fe(CN)(6)(3-/4-) + 1.0 M Na2SO4 aqueous solution, a capacitance of 73.42 mF cm(-2) was obtained at a current density of 1 mA cm(-2). This value is 10 000 times higher than the capacitance of diamond electric double layer capacitors (EDLCs). The energy and power densities of a fabricated diamond network symmetric pseudocapacitor were up to 56.50 W h kg(-1) and 13.7 kW kg(-1), respectively. Compared with those of diamond EDLCs obtained with the same cell voltage, they are enhanced about 3500 and 1440 fold, respectively. Therefore the combination of diamond networks and water-soluble redox electrolytes is a novel approach to construct electrochemical capacitors and thus bridges the gap between normal dielectric capacitors and rechargeable batteries.
学科主题	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
语种	英语
资助机构	China Scholarship Council [201408080015]; German Research Foundation (DFG) [YA344/1-1]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79190]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang, NJ; Jiang, X (reprint author), Univ Siegen, Inst Mat Engn, D-57076 Siegen, Germany.
推荐引用方式 GB/T 7714	Yu, Siyu,Yang, Nianjun,Zhuang, Hao,et al. Battery-like supercapacitors from diamond networks and water-soluble redox electrolytes[J]. ROYAL SOC CHEMISTRY,2017,5(4):1778-1785.
APA	Yu, Siyu.,Yang, Nianjun.,Zhuang, Hao.,Mandal, Soumen.,Williams, Oliver A..,...&Jiang, X .(2017).Battery-like supercapacitors from diamond networks and water-soluble redox electrolytes.ROYAL SOC CHEMISTRY,5(4),1778-1785.
MLA	Yu, Siyu,et al."Battery-like supercapacitors from diamond networks and water-soluble redox electrolytes".ROYAL SOC CHEMISTRY 5.4(2017):1778-1785.