Porous hydroxide nanosheets on preformed nanowires by electrodeposition: Branched nanoarrays for electrochemical energy storage

Xinhui Xia, Jiangping Tu, Yongqi Zhang, Jiao Chen, Xiuli Wang, Changdong Gu, Cao Guan, Jingshan Luo, Hong Jin Fan

科研成果: 期刊稿件文章同行评审

209 引用 (Scopus)

摘要

Fast, high-yield, and controllable synthesis of functional hydroxide and oxide nanomaterials on conductive substrates is highly desirable for the energy generation and storage applications. For the same purpose, three-dimensional hierarchical porous nanostructures are being regarded advantageous. In this work, we report the fabrication of porous metal hydroxide nanosheets on a preformed nanowires scaffold using the fast and well-controllable electrodeposition method. Co(OH) 2 and Mn(OH) 2 nanosheets are electrochemically deposited on the Co 3O 4 core nanowires to form core/shell arrays. Such oxide/hydroxide core/shell nanoarrays can be realized on various conductive substrates. The Co 3O 4/Co(OH) 2 core/shell nanowire arrays are evaluated as a supercapacitor cathode material that exhibits high specific capacitances of 1095 F/g at 1 A/g and 812 F/g at 40 A/g, respectively. The mesoporous homogeneous Co 3O 4 core/shell nanowire arrays, obtained by annealing the Co 3O 4/Co(OH) 2 sample, are applied as the anode material for lithium ion batteries. A high capacity of 1323 mAh/g at 0.5 C and excellent cycling stability are demonstrated. Our results show that electrodeposition is a versatile technique for fabrication of nanometal oxides on 3-D templates for electrochemical energy applications.

源语言英语
页(从-至)3793-3799
页数7
期刊Chemistry of Materials
24
19
DOI
出版状态已出版 - 9 10月 2012
已对外发布

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