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Ultrathin Ni(OH)(2) layer coupling with graphene for fast electron/ion transport in supercapacitor
Zhang, XY; Wang, HS; Shui, LL; Zhou, GF; Wang, X; Ma, RG; Wang, JC
2020-09-15
Source PublicationSCIENCE CHINA-MATERIALS
ISSN2095-8226
SubtypeArticle; Early Access
AbstractIntegration of fast electrochemical double-layer capacitance and large pseudocapacitance is a practical way to improve the overall capability of supercapacitor, yet remains challenging. Herein, an effective cyanogel synthetic strategy was demonstrated to prepare ultrathin Ni(OH)(2)nanosheets coupling with conductive reduced graphene oxide (rGO) (rGO-Ni(OH)(2)) at ambient condition. Ultrathin Ni(OH)(2)nanosheet with 3-4 layers of edge-sharing octahedral MO(6)maximally exposes the active surface of Faradic reaction and promotes the ion diffusion, while the conductive rGO sheet boosts the electron transport during the reaction. Even at 30 A g(-1), the optimal sample can deliver a specific capacitance of 1119.52 F g(-1), and maintain 82.3% after 2000 cycles, demonstrating much higher electrochemical capability than bare Ni(OH)(2)nanosheets. A maximum specific energy of 44.3 W h kg(-1)(148.5 W kg(-1)) is obtained, when assembled in a two-electrode system rGO-Ni(OH)(2)//rGO. This study provides an insight into efficient construction of two dimensional hybrid electrodes with high performance for the new-generation energy storage system.
DOI10.1007/s40843-020-1427-0
WOS KeywordDOUBLE HYDROXIDE NANOSHEETS ; ELECTROCHEMICAL PERFORMANCE ; CARBON MATERIALS ; ENERGY-STORAGE ; ELECTRODES ; HYBRID ; NI ; NANOCOMPOSITES ; COMPOSITE
Language英语
WOS Research AreaMaterials Science
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27757
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Zhang, XY,Wang, HS,Shui, LL,et al. Ultrathin Ni(OH)(2) layer coupling with graphene for fast electron/ion transport in supercapacitor[J]. SCIENCE CHINA-MATERIALS,2020.
APA Zhang, XY.,Wang, HS.,Shui, LL.,Zhou, GF.,Wang, X.,...&Wang, JC.(2020).Ultrathin Ni(OH)(2) layer coupling with graphene for fast electron/ion transport in supercapacitor.SCIENCE CHINA-MATERIALS.
MLA Zhang, XY,et al."Ultrathin Ni(OH)(2) layer coupling with graphene for fast electron/ion transport in supercapacitor".SCIENCE CHINA-MATERIALS (2020).
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