Supercapacitive Characteristics of Potentiodynamically-Deposited Nano-Structured Cobalt-Nickel Oxide
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- GUPTA Vinay
- Art, Science and Technology Center for Cooperative Research, Kyushu University Japan Science and Technology Agency
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- MIURA Norio
- Art, Science and Technology Center for Cooperative Research, Kyushu University
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The amorphous cobalt-nickel oxide nano-rods (diameter: 20∼30 nm, length: 100∼150 nm) were potentiodynamically deposited onto a stainless-steel electrode. Their structure and surface morphology were investigated by means of X-ray diffraction analysis and scanning electron microscopy. Their capacitive characteristics were evaluated in 1 M KOH electrolyte by using cyclic voltammetry and constant current charge-discharge methods. It was found that the capacitive characteristics of deposited cobalt-nickel oxide were strongly influenced by the deposition condition. A high specific capacitance value of ∼370 F/g and a specific power of 29 kW/kg were obtained when cobalt-nickel oxide was deposited in the aqueous solution of 0.15 M NiCl2·6H2O+0.05 M CoCl2·6H2O in potentiodynamic conditions. In comparison, the specific capacitance values for the deposited cobalt oxide and nickel oxide were 184 F/g and 118 F/g, respectively. The cycle-life test showed that the specific capacitance of cobalt-nickel oxide was highly stable even after 100,000 cycles, indicating its high potential for supercapacitor applications.
収録刊行物
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- Electrochemistry
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Electrochemistry 75 (8), 582-585, 2007
公益社団法人 電気化学会
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詳細情報 詳細情報について
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- CRID
- 1390001206496352128
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- NII論文ID
- 10019016914
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- NII書誌ID
- AN00151637
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- COI
- 1:CAS:528:DC%2BD1MXht1anur3O
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- ISSN
- 21862451
- 13443542
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- NDL書誌ID
- 8917025
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用可