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氧化鈷/鎳核殼結(jié)構(gòu)納米線的合成及其在超級(jí)電容器的運(yùn)用
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西安理工大學(xué)材料科學(xué)與工程學(xué)院,上海復(fù)旦大學(xué)化學(xué)系,西安交通大學(xué)理學(xué)院,西安交通大學(xué)理學(xué)院,西安交通大學(xué)理學(xué)院

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國(guó)家自然科學(xué)基金 （No. 51271135）


Synthesis of Cobaltous Nickel Oxide Core/Shell Nanowires for Supercapacitors
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School of Material Science and Engineering, Xi'an University of Technology, Xi'an, China,Department of Chemistry, Fudan University, Shanghai , People's Republic of China,School of Science, MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, People's Republic of China.,School of Science, MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, People's Republic of China.,School of Science, MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China.

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    摘要:

    在本文中，我們通過(guò)兩步法合成了具有核殼結(jié)構(gòu)的CoO/NiO納米線。透射電子顯微鏡的結(jié)果顯示，CoO納米線被NiO的納米片層結(jié)構(gòu)緊密包覆，同時(shí)該樣品具有獨(dú)特的多孔結(jié)構(gòu)。由于其特殊結(jié)構(gòu)，該樣品用于超級(jí)電容器電極材料顯示了優(yōu)異的電容性能（當(dāng)電流密度為1 A g-1時(shí)，其比電容能夠達(dá)到708 F g-1），同時(shí)該樣品顯示了良好的倍率特性以及循環(huán)穩(wěn)定性（當(dāng)循環(huán)1000個(gè)周期后，其電容保持力為80 %），其電容性能明顯優(yōu)于單組份樣品。這主要是由于CoO納米線和NiO納米片相比于單一組分能夠?yàn)檠趸€原反應(yīng)提供更多的活性位點(diǎn)，這種協(xié)同作用有助于提高材料整體的比電容以及電化學(xué)穩(wěn)定性。

    Abstract:

    CoO/NiO core/shell nanowires (NWs) were synthesized using an efficient two-step approach. The detailed structural analysis through the transmission electron microscopy indicated that the CoO NW core was well enclosed by the NiO nanoflake shell with an unique nanoporous structure. Benefits from these structural advantages, when the obtained CoO/NiO core/shell NW material was used as a supercapacitor electrode, it presented a much enhanced capacitance ( 708 F g-1 at 1 A g-1), better rate capability and excellent cycling performance (>80 % capacitance retention for 1000 cycles) compared with the single component samples. Besides, the synergetic interaction between the CoO NWs and NiO nanoflakes could produces more active sites for redox progresses than single material during the electrochemical reaction, which can provide synergistic effect to the capacitance and electrochemical stability.

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邢方凱,任昊琦,季辰辰,張遠(yuǎn)平,楊生春.氧化鈷/鎳核殼結(jié)構(gòu)納米線的合成及其在超級(jí)電容器的運(yùn)用[J].稀有金屬材料與工程,2017,46(11):3253~3259.[XingFangKai, RenHaoQi, JiChenChen, ZhangYuanPing, YangShengChun. Synthesis of Cobaltous Nickel Oxide Core/Shell Nanowires for Supercapacitors[J]. Rare Metal Materials and Engineering,2017,46(11):3253~3259.]
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  • 收稿日期:2016-09-18
  • 最后修改日期:2016-12-03
  • 錄用日期:2016-12-09
  • 在線發(fā)布日期: 2017-12-13
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