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首页> 外文期刊>Advanced Functional Materials >Ternary Hybrids of Amorphous Nickel Hydroxide-Carbon Nanotube-Conducting Polymer for Supercapacitors with High Energy Density, Excellent Rate Capability, and Long Cycle Life
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Ternary Hybrids of Amorphous Nickel Hydroxide-Carbon Nanotube-Conducting Polymer for Supercapacitors with High Energy Density, Excellent Rate Capability, and Long Cycle Life

机译：非晶态氢氧化镍-碳纳米管导电聚合物的三元杂化物，用于高电容器，具有高能量密度，优异的倍率能力和长循环寿命

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摘要

The utilization of Ni(OH)_2 as a pseudocapacitive material for high performance supercapacitors is hindered by its low electrical conductivity and short cycle life. A coaxial ternary hybrid material comprising of amorphous Ni(OH)_2 deposited on multiwalled carbon nanotubes wrapped with conductive polymer (poly (3,4-ethylenedioxythiophene)-poly(styrenesulfonate)) is demonstrated. A thin layer of disordered amorphous Ni(OH)_2 is deposited by an effective "coordinating etching and precipitating" method, resulting in an ultrahigh specific capacitance of 3262 F g~(-1) at 5 mV s~(-1) and excellent rate capability (71.9% capacitance retention at 100 mV s~(-1)). More importantly, the polymer layer prevents the degradation of the nanostructure and dissolution of Ni ion during repeated charge-discharge cycling for 30 000 cycles, a phenomenon which often plagues Ni(OH)_2 nanomaterials. Using the ternary Ni(OH)_2 hybrid and the reduced graphene oxide/carbon nanotube hybrid as the positive and negative electrodes, respectively, the assembled asymmetric supercapacitors exhibit high energy density of 58.5 W h kg~(-1) at the power density of 780 W kg~(-1) as well as long cycle life (86% capacitance retention after 30 000 cycles). The ternary hybrid architecture design for amorphous Ni(OH)_2 can be regarded as a general approach to obtain pseudocapacitive materials for supercapacitors with both high energy density, excellent rate capability, and long cycle life.
机译：Ni（OH）_2作为高性能超级电容器的准电容材料的使用因其低电导率和短循环寿命而受到阻碍。说明了一种同轴三元杂化材料，该杂物由非晶态的Ni（OH）_2沉积在包裹有导电聚合物（聚（3,4-乙撑二氧噻吩）-聚（苯乙烯磺酸盐））的多壁碳纳米管上。通过有效的“配位蚀刻和沉淀”方法沉积无序非晶态Ni（OH）_2薄层，在5 mV s〜（-1）时产生的超高比电容为3262 F g〜（-1）速率能力（100 mV s〜（-1）时的电容保持率为71.9％）。更重要的是，聚合物层可防止在30 000次反复充放电循环过程中纳米结构的降解和Ni离子的溶解，这种现象经常困扰Ni（OH）_2纳米材料。使用三元Ni（OH）_2杂化物和还原型氧化石墨烯/碳纳米管杂化物分别作为正电极和负电极，组装的不对称超级电容器在功率密度为58.5 W h kg〜（-1）时表现出高能量密度。 780 W kg〜（-1）以及长寿命（3万次循环后电容保持率达86％）。非晶态Ni（OH）_2的三元混合体系结构设计可以看作是获得具有高能量密度，优异的倍率能力和长循环寿命的超级电容器的伪电容材料的通用方法。

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  • 来源
    《Advanced Functional Materials》 |2015年第7期|1063-1073|共11页
  • 作者

    Wenchao Jiang; Dingshan Yu; Qiang Zhang; Kunli Goh; Li Wei; Yili Yong; Rongrong Jiang; Jun Wei; Yuan Chen;

  • 作者单位

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

    Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University No. 1, Tsinghuayuan, Beijing 100084, P.R. China;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

    Singapore Institute of Manufacturing Technology 71 Nanyang Drive 638075, Singapore;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive 637459, Singapore;

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