期刊
ELECTROCHIMICA ACTA
卷 56, 期 5, 页码 2068-2073出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.11.089
关键词
Electrophoretic deposition; Nickel-oxide anode; Anodic electrodeposition; Lithium-ion batteries; Polystyrene-sphere monolayer
资金
- National Science Council, Taiwan, Republic of China [NSC 99-2221-E-151-061]
A nickel-oxide film with monodispersed open macropores was prepared on a stainless-steel substrate by electrophoretic deposition of a polystyrene-sphere monolayer followed by anodic electrodeposition of nickel oxy-hydroxide. The deposited films convert to cubic nickel oxide after annealing at 400 degrees C for 1 h. Galvanostatic charge and discharge results indicate that the nickel-oxide film with monodispersed open macropores is capable of delivering a higher capacity than the bare nickel-oxide film, especially in high-rate charge and discharge processes. The lithiation capacity of macroporous nickel oxide reaches 1620 mA h g(-1) at 1 degrees C current discharge and decreases to 990 mA h g(-1) at 15C current discharge. The presence of monodispersed open macropores in the nickel-oxide film might facilitate the electrolyte penetration, diffusion, and migration. Electrochemical reactions between nickel oxide and lithium ions are therefore markedly improved by this tailored film architecture. (C) 2010 Elsevier Ltd. All rights reserved.
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