CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Unifying miscellaneous performance criteria for a prototype supercapacitor via Co(OH)(2) active material and current collector interactions
Wang, HX; Zhang, W; Drewett, NE; Zhang, HB; Huang, KK; Feng, SH; Li, XL; Kim, J; Yoo, S; Deng, T; Liu, SJ; Wang, D; Zheng, WT
2017
Source PublicationJOURNAL OF MICROSCOPY
ISSN0022-2720
Volume267Issue:1Pages:34-48
Subtype期刊论文
AbstractThe use of transition metal oxides and hydroxides in supercapacitors can yield high specific capacity electrodes. However, the effect of interaction between active material and current collector has remained unexplored. Here the behaviour of electrodeposited hexagonal cobalt hydroxide nanosheets on a variety of substrates was investigated, and the resulting valence bonding, morphological evolutions and phase transformations examined. It is shown that the electrochemical activity of the face centred cubic (FCC) Ni substrate dramatically decreases cyclability, the FCC Cu substrate also demonstrates decreased performance, and hexagonal carbon nanofibre (CNF) and Ti substrates exhibit far more stability. The miscellaneous roles of valence bonding, redox reactions and crystal structure mismatch between active material and current collector are examined, and their consequences discussed. Using the resulting insights into performance criteria, it was possible to select a suitable substrate for the fabrication of an asymmetric supercapacitor. The high performance and stability of the device demonstrates the usefulness of this approach, and the utility of applying these insights to energy storage devices. Lay description Active electrode includes both active material and current collectors, which can work with an electrolyte to store charge. Active materials, such as transition metal hydroxides, can store the charge by revisable redox reaction. The stored charge should be transported to the open circuit through current collectors. Hence, the choice of the current collectors, as well as the interaction between the active material and current collectors, is of vital importance. Here we demonstrated with this survey, that miscellaneous interactions between the active material and different porous current collectors affect the fast charge transfer and electron transport processes in the electrode. Ascribed to a pool of valence bonding, structure and morphology, the flower-like Co(OH)(2)/CoOOH nanosheets on different current collectors, show a variety of specific capacities and stabilities. The influence of the different current collector can be summarised: Capacity of electrode: Ni > Ti approximate to CNF > Cu; Stability of electrode: Ti approximate to CNF > Cu > Ni. Thus, for a high-performance electrochemical active material, choice of current collector support is a key factor for the final performance of a supercapacitor.
KeywordElectrochemical Energy-storage X-ray-diffraction Cobalt Hydroxide In-situ Pseudocapacitive Properties Asymmetric Supercapacitor Electrode Materials Graphene Foam Alpha-cobalt Nanosheets
DOI10.1111/jmi.12545
Indexed BySCI
WOS KeywordELECTROCHEMICAL ENERGY-STORAGE ; X-RAY-DIFFRACTION ; COBALT HYDROXIDE ; IN-SITU ; PSEUDOCAPACITIVE PROPERTIES ; ASYMMETRIC SUPERCAPACITOR ; ELECTRODE MATERIALS ; GRAPHENE FOAM ; ALPHA-COBALT ; NANOSHEETS
Language英语
WOS IDWOS:000403462600003
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28891
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Wang, HX,Zhang, W,Drewett, NE,et al. Unifying miscellaneous performance criteria for a prototype supercapacitor via Co(OH)(2) active material and current collector interactions[J]. JOURNAL OF MICROSCOPY,2017,267(1):34-48.
APA Wang, HX.,Zhang, W.,Drewett, NE.,Zhang, HB.,Huang, KK.,...&Zheng, WT.(2017).Unifying miscellaneous performance criteria for a prototype supercapacitor via Co(OH)(2) active material and current collector interactions.JOURNAL OF MICROSCOPY,267(1),34-48.
MLA Wang, HX,et al."Unifying miscellaneous performance criteria for a prototype supercapacitor via Co(OH)(2) active material and current collector interactions".JOURNAL OF MICROSCOPY 267.1(2017):34-48.
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