Fabrication of highly ordered porous nickel oxide anode materials and their electrochemical characteristics in lithium storage

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[1] [1,Miao, Fengjuan
[2] Li, Qianqian
[3] 2,Tao, Bairui
[4] Chu, Paul K.
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Tao, B. (tbr_sir@163.com) | 1600年 / Elsevier Ltd卷 / 594期
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The structure and electrochemical properties of silicon microchannel plates (MCP)-supported NiO nanocomposites (NiO/Si-MCP) synthesized by silicon micromachining; electroless plating; and thermal annealing are investigated as anodes in lithium ion batteries. Galvanostatic charge and discharge results indicate that the NiO/Si-MCP is capable of delivering a higher capacity than the bare nickel-oxide film. At a 1 C current; the NiO/Si-MCP nanocomposite film shows an enormous first discharge capacity of about 3190 mA g-1 and charge capacity of 1977 mA g-1. After 15 cycles; the NiO/Si-MCP nanocomposite retains a reversible capacity of 1531 mA g-1 with 63.7% of the capacity maintained in the 2nd cycle. The lithium storage capacity is maintained at ∼880 mA h g-1 after 50 discharge/charge cycles and it is much larger than that of NiO and its composites. The enhanced electrochemical performance of the highly ordered three-dimensional materials is attributed to the synergistic effects offered by the silicon microchannel plates in the nickel oxide film subsequently facilitating electrolyte penetration; diffusion; and migration. The structure is promising anode materials in lithium-ion batteries. © 2014 Elsevier B.V. All rights reserved;
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