New Findings of Pseudocapacitive Behaviors in Cupric Tungstate Dihydrate

doi:10.1021/acs.jpcc.1c10312

	New Findings of Pseudocapacitive Behaviors in Cupric Tungstate Dihydrate
	Gao, Jian-Fei 1,2; Hou, Jing-Feng 1,2; Kong, Ling-Bin 1,2
刊名	Journal of Physical Chemistry C
	2022-03-03
卷号	126 期号:8 页码:3853-3863
关键词	Copper compounds Cyclic voltammetry Electric discharges Manganese oxide Niobium oxide Redox reactions Tungsten compounds Copper tungstate Cyclic voltammetry curves Dihydrates Electrochemicals Hot research topics Pseudo-capacitive materials Pseudocapacitance Pseudocapacitive Pseudocapacitive behavior Pseudocapacitors
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.1c10312
英文摘要	The pseudocapacitive behavior is a hot research topic in the electrochemical field. There are two most widely studied types of pseudocapacitors: (i) based on the redox reaction pseudocapacitance represented by RuO2·xH2O, MnO2, and so on and (ii) the intercalation pseudocapacitive materials such as Nb2O5. It is important to study the pseudocapacitive mechanism and discover new materials with pseudocapacitive behavior for a clearer understanding of pseudocapacitive characteristics. Here, we discover and report the pseudocapacitive behavior of copper tungstate hydrate for the first time. Its cyclic voltammetry curve shape is similar to that of MXene (Ti3C2Tx), its potential window (−0.4 to 0.2 V) is also close to that of MXene, and its charge-discharge curve is almost an ideal isosceles triangle. These electrochemical analysis results indicate that the electrochemical behavior of CuWO4 is a new type of intercalation pseudocapacitive behavior. In addition, because of the higher density of CuWO4 (7.5 g cm-3), it exhibits an excellent volumetric specific capacitance of 743 F cm-3 at 0.5 A g-1 (similar to that of MXenes). The novel pseudocapacitive behavior of CuWO4 reported in this work facilitates the development of a new material system for pseudocapacitive research. The follow-up studies are more concerned with how the pseudocapacitive behavior of this material occurs. © 2022 American Chemical Society
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	American Chemical Society
WOS记录号	WOS:000773651500006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158053]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Gao, Jian-Fei,Hou, Jing-Feng,Kong, Ling-Bin. New Findings of Pseudocapacitive Behaviors in Cupric Tungstate Dihydrate[J]. Journal of Physical Chemistry C,2022,126(8):3853-3863.
APA	Gao, Jian-Fei,Hou, Jing-Feng,&Kong, Ling-Bin.(2022).New Findings of Pseudocapacitive Behaviors in Cupric Tungstate Dihydrate.Journal of Physical Chemistry C,126(8),3853-3863.
MLA	Gao, Jian-Fei,et al."New Findings of Pseudocapacitive Behaviors in Cupric Tungstate Dihydrate".Journal of Physical Chemistry C 126.8(2022):3853-3863.