Carbon-coated WS2 nanosheets supported on carbon nanofibers for high-rate potassium-ion capacitors

doi:10.1039/d1ee00193k

CORC > 金属研究所 > 中国科学院金属研究所

	Carbon-coated WS2 nanosheets supported on carbon nanofibers for high-rate potassium-ion capacitors
	Geng, Shitao 1; Zhou, Tong 1; Jia, Minyu 1; Shen, Xiangyan 2; Gao, Peibo 1; Tian, Shuang 1; Zhou, Pengfei 2; Liu, Bo 1; Zhou, Jin 2; Zhuo, Shuping 2
刊名	ENERGY & ENVIRONMENTAL SCIENCE
	2021-04-10
页码	10
ISSN号	1754-5692
DOI	10.1039/d1ee00193k
通讯作者	Zhou, Tong(zhoutong@sdut.edu.cn) ; Zhou, Jin(zhoujin@sdut.edu.cn) ; Li, Feng(fli@imr.ac.cn)
英文摘要	Potassium-ion capacitors (PICs) have received increasing attention because of their high energy/power densities and the abundance of potassium. However, achieving high-rate battery-type anodes to match the capacitor-type cathodes is still a great challenge. Herein, we design a freestanding anode by supporting carbon-coated WS2 nanosheets on carbon nanofibers (C-WS2@CNFs) for PICs. Benefiting from its unique nanostructure and the high purity of WS2, the C-WS2@CNFs anode exhibits a high reversible capacity of 319 mA h g(-1) at 50 mA g(-1) and a high rate performance of 168 mA h g(-1) at 10 A g(-1). An intercalation-conversion reaction mechanism with an intermediate phase of K2S5 is verified by in situ Raman, in situ XRD, and ex situ XRD and TEM. First-principles calculations confirm that the C-WS2@CNFs anode possesses fast K+ diffusion kinetics and a high K-adsorption ability. The potassium ion capacitor, assembled from the anode of C-WS2@CNFs and the cathode of activated carbon nanofibers, delivers a superior energy density up to 180.4 W h kg(-1), a good rate capability, and a long cycle life.
资助项目	National Natural Science Foundation of China[51525206] ; National Natural Science Foundation of China[22078179] ; National Natural Science Foundation of China[21978159] ; Natural Science Foundation of Shandong Province[ZR2017JL014] ; Taishan Scholar Foundation[tsqn201812063]
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000645250600001
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province ; Taishan Scholar Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/162080]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhou, Tong; Zhou, Jin; Li, Feng
作者单位	1.Shandong Univ Technol, Sch Phys & Optoelect Engn, Zibo 255049, Peoples R China 2.Shandong Univ Technol, Sch Chem & Chem Engn, Zibo 255049, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Geng, Shitao,Zhou, Tong,Jia, Minyu,et al. Carbon-coated WS2 nanosheets supported on carbon nanofibers for high-rate potassium-ion capacitors[J]. ENERGY & ENVIRONMENTAL SCIENCE,2021:10.
APA	Geng, Shitao.,Zhou, Tong.,Jia, Minyu.,Shen, Xiangyan.,Gao, Peibo.,...&Li, Feng.(2021).Carbon-coated WS2 nanosheets supported on carbon nanofibers for high-rate potassium-ion capacitors.ENERGY & ENVIRONMENTAL SCIENCE,10.
MLA	Geng, Shitao,et al."Carbon-coated WS2 nanosheets supported on carbon nanofibers for high-rate potassium-ion capacitors".ENERGY & ENVIRONMENTAL SCIENCE (2021):10.