title: Highly dispersed ultrasmall Ni(OH)2aggregated particles on a conductive support as a supercapacitor electrode with superior performance.
abstract: To reduce the size of Ni(OH)2aggregates is an effective way to improve their capacitive performance for the electrodes of supercapacitors. The ultrasmall Ni(OH)2aggregates (1-2nm) on active carbon (AC) can be obtained by depositing the soluble precursor of Ni(OH)2on AC at low temperature. The Ni(OH)2/AC samples were characterized by SEM, TEM, XRD and XPS. The specific capacitance of ultrasmall Ni(OH)2aggregates in the Ni(OH)2/AC composite can reach 2949Fg-1at a scan rate of 20mVs-1, which is higher than its theoretical specific capacitance (2382Fg-1). Ni(OH)2aggregates supported on carbon cloth can also exhibit superior specific capacitance as a bind-free flexible electrode. The capacitive, rate and cycling performance of ultrasmall Ni(OH)2aggregates on AC are excellent, revealing the great potential of ultrasmall sized materials in energy storage.
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China.
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Zhang
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Li
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China.
authors.forename: Hang
authors.initials: H
authors.lastname: Wei
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China.
authors.forename: Yongguang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: pjiang@nanoctr.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China. Electronic address: liangmh@nanoctr.cn.
authors.forename: Minghui
authors.initials: M
authors.lastname: Liang
keywords: Electrochemical energy; Ni(OH)(2); Pseudocapacitors; Specific capacitance; Supercapacitors; Ultrasmall size