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Porous Ni-3(NO3)(2)(OH)(4) nano-sheets for supercapacitors: Facile synthesis and excellent rate performance at high mass loadings

机译：用于超级电容器的多孔Ni-3（NO3）（2）（OH）（4）纳米片：易于合成且在高质量负载下具有出色的速率性能

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摘要

For supercapacitors, pores in electrode materials can accelerate chemical reaction kinetics by shortening ion diffusion distances and by enlarging electrolyte/electrode interfaces. This article describes a simple one-step route for the preparation of pure-phase porous Ni-3(NO3)(2)(OH)(4) nano-sheets by directly heating a mild Ni(NO3)(2) and urea solution. During heating, urea decomposed into NH3 center dot H2O, which provided a suitable alkaline environment for the formation of Ni-3(NO3)(2)(OH)(4) nano-sheets. Meanwhile, the side product, NH4NO3, created numerous pores as a pore-forming agent. After NH4NO3 removal, the specific surface areas and pore volumes of products were boosted by similar to 180-times (from 0.61 to 113.12 m(2)/g) and similar to 90-times (from 3.40 x 10(-3) to 3.17 x 10(-1)m(2)/g), respectively. As a cathode material of supercapacitor, the porous Ni-3(NO3)(2)(OH)(4) nano-sheets exhibited a high specific capacitance of 1094 F/g at an ultrahigh mass loading of 17.55 mg/cm(2), leading to an impressive areal capacitance of 19.2 F/cm(2). Furthermore, a Ni-3(NO3)(2)(OH)(4) nano-sheet//commercial active carbon asymmetric supercapacitor was constructed and delivered an energy density of 33.2 Wh/Kg at a power density of 190.5 W/Kg, based on the mass of active materials on both electrodes. (C) 2017 Published by Elsevier B.V.
机译：对于超级电容器，电极材料中的孔可通过缩短离子扩散距离并扩大电解质/电极界面来加速化学反应动力学。本文介绍了一种通过直接加热温和的Ni（NO3）（2）和尿素溶液制备纯相多孔Ni-3（NO3）（2）（OH）（4）纳米片的简单一步法。在加热过程中，尿素分解成NH3中心点H2O，这为形成Ni-3（NO3）（2）（OH）（4）纳米片提供了合适的碱性环境。同时，副产物NH 4 NO 3产生许多孔作为成孔剂。除去NH4NO3后，产品的比表面积和孔体积增加了约180倍（从0.61到113.12 m（2）/ g）和90倍（从3.40 x 10（-3）到3.17） x 10（-1）m（2）/ g）。作为超级电容器的阴极材料，多孔Ni-3（NO3）（2）（OH）（4）纳米片在17.55 mg / cm（2）的超高质量负载下表现出1094 F / g的高比电容。 ，导致令人印象深刻的19.2 F / cm（2）的面电容。此外，构建了Ni-3（NO3）（2）（OH）（4）纳米片//商业活性炭不对称超级电容器，并以190.5 W / Kg的功率密度提供了33.2 Wh / Kg的能量密度，基于两个电极上活性物质的质量。 （C）2017由Elsevier B.V.发布

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  • 来源
    《Applied Surface Science》 |2018年第ptab期|678-686|共9页
  • 作者

    Shi Mingjie; Cui Mangwei; Kang Litao; Li Taotao; Yun Shan; Du Jing; Xu Shoudong; Liu Ying;

  • 作者单位

    Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Green Energy Mat & Storage Syst, Taiyuan 030024, Shanxi, Peoples R China;

    Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Green Energy Mat & Storage Syst, Taiyuan 030024, Shanxi, Peoples R China;

    Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Green Energy Mat & Storage Syst, Taiyuan 030024, Shanxi, Peoples R China|Huaiyin Inst Technol, Jiangsu Prov Engn Lab Adv Mat Salt Chem Ind, Jiangsu Collaborat Innovat Ctr Rock Salt & Concav, Huaian 223003, Peoples R China;

    Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Green Energy Mat & Storage Syst, Taiyuan 030024, Shanxi, Peoples R China;

    Huaiyin Inst Technol, Jiangsu Prov Engn Lab Adv Mat Salt Chem Ind, Jiangsu Collaborat Innovat Ctr Rock Salt & Concav, Huaian 223003, Peoples R China;

    Shenzhen China Text Filters Co Ltd, Shenzhen 518055, Peoples R China;

    Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Green Energy Mat & Storage Syst, Taiyuan 030024, Shanxi, Peoples R China;

    Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Green Energy Mat & Storage Syst, Taiyuan 030024, Shanxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Nickel hydroxidenitrate; Nanosheets; Supercapacitor; Rate capability; Mass loading;

    机译：硝酸镍;纳米片;超级电容器;额定容量;质量载荷;

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