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Carbon-coated WS2 nanosheets supported on carbon nanofibers for high-rate potassium-ion capacitors
Geng, Shitao1; Zhou, Tong1; Jia, Minyu1; Shen, Xiangyan2; Gao, Peibo1; Tian, Shuang1; Zhou, Pengfei2; Liu, Bo1; Zhou, Jin2; Zhuo, Shuping2; Li, Feng3
Corresponding AuthorZhou, Tong(zhoutong@sdut.edu.cn) ; Zhou, Jin(zhoujin@sdut.edu.cn) ; Li, Feng(fli@imr.ac.cn)
2021-04-10
Source PublicationENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
Pages10
AbstractPotassium-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.
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Shandong Province ; Taishan Scholar Foundation
DOI10.1039/d1ee00193k
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
WOS SubjectChemistry, Multidisciplinary ; Energy & Fuels ; Engineering, Chemical ; Environmental Sciences
WOS IDWOS:000645250600001
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162081
Collection中国科学院金属研究所
Corresponding AuthorZhou, Tong; Zhou, Jin; Li, Feng
Affiliation1.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
Recommended Citation
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.
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