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Citation: DUAN Hao, LIU Kai-Yu, ZHANG Ying, WANG Jue, LIAO Jian-Ping. Effects of Hydrothermal Modification on the Electrochemical Properties of Nano-scale Nickel Hydroxide[J]. Chinese Journal of Applied Chemistry, ;2009, 26(6): 711-715. shu

Effects of Hydrothermal Modification on the Electrochemical Properties of Nano-scale Nickel Hydroxide

1.
College Chemistry & Chemical engineering, Central South University, Changsha 410083

Corresponding author: LIU Kai-Yu,
Received Date: 11 June 2008
Available Online: 5 September 2008
Fund Project: 国家自然科学基金(20376086)资助项目 (20376086)

Nano-scale nickel hydroxide was synthesized by micro-emulsion and its structure,surface morpho-logy and electrochemical performance were tested and analyzed by means of X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),galvanostatic charge/discharge,cyclic voltammetry and electrochemical impedance spectroscopy.The results show that nano-scale nickel hydroxide turned to different morphologies after hydrothermal and micro-emulsion/hydrothermal modification.Though the results of the activation performance of unsettled and treated nano-scale nickel hydroxide were uniform,the discharging specific capacity of nano-scale nickel hydroxide was different.The discharging specific capacity of nano-scale nickel hydroxide,which underwent hydrothermal treatment at 140 ℃,was increased by 24.6 mA·h/g,while the nano-scale nickel hydroxide,which underwent micro-emulsion/hydrothermal treatment,was increased by 74.8 mA·h/g.The peak current of cyclic voltammetry also increased and the charge-transfer resistances decreased from 2.633 Ω to 2.464 Ω and 1.679 Ω respectively.
- nano-scale nickel hydroxide,
- micro-emulsion,
- hydrothermal
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