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首页> 外文期刊>Advanced Functional Materials >Ultrahigh-Performance Pseudocapacitor Electrodes Based on Transition Metal Phosphide Nanosheets Array via Phosphorization: A General and Effective Approach
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Ultrahigh-Performance Pseudocapacitor Electrodes Based on Transition Metal Phosphide Nanosheets Array via Phosphorization: A General and Effective Approach

机译：基于过渡金属磷化物纳米片阵列的磷化超高性能伪电容器电极：一种通用且有效的方法

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摘要

In this study, a general and effective phosphorization strategy is successfully demonstrated to enhance supercapacitor performance of various transition metals oxide or hydroxide, such as Ni(OH)(2), Co(OH)(2), MnO2, and Fe2O3. For example, a 3D networked Ni2P nanosheets array via a facile phosphorization reaction of Ni(OH)(2) nanosheets is grown on the surface of a Ni foam. The Ni foam-supported Ni2P nanosheet (Ni2P NS/NF) electrode shows a remarkable specific capacitance of 2141 F g(-1) at a scan rate of 50 mV s(-1) and remains as high as 1109 F g(-1) even at the current density of 83.3 A g(-1). The specific capacitance is much larger than those of Ni(OH)(2) NS/NF (747 F g(-1) at 50 mV s(-1)). Furthermore, the electrode retains a high specific capacitance of 1437 F g(-1) even after 5000 cycles at a current density of 10 A g(-1), in sharp contrast with only 403 F g(-1) of Ni(OH)(2) NS/NF at the same current density. The similar enhanced performance is observed for Ni2P powder, which eliminates the influence of nickel foam. The enhanced supercapacitor performances are attributed to the 3D porous nanosheets network, enhanced conductivity, and two active components of Ni2+ and P- with rich valences of Ni2P.
机译：在这项研究中，成功​​地证明了通用有效的磷化策略可增强各种过渡金属氧化物或氢氧化物（如Ni（OH）（2），Co（OH）（2），MnO2和Fe2O3）的超级电容器性能。例如，经由Ni（OH）（2）纳米片的容易的磷酸化反应的3D网络化的Ni 2 P纳米片阵列在Ni泡沫的表面上生长。 Ni泡沫支撑的Ni2P纳米片（Ni2P NS / NF）电极在50 mV s（-1）的扫描速率下显示2141 F g（-1）的显着比电容，并保持高达1109 F g（-1） ），即使在83.3 A g（-1）的电流密度下也是如此。比电容比Ni（OH）（2）NS / NF的电容大得多（在50 mV s（-1）时为747 F g（-1））。此外，即使在电流密度为10 A g（-1）的情况下经过5000次循环，该电极仍可保持1437 F g（-1）的高比电容，与仅403 F g（-1）的Ni（OH）形成鲜明对比）（2）NS / NF在相同的电流密度下。对于Ni2P粉末，观察到了类似的增强性能，从而消除了泡沫镍的影响。超级电容器性能的提高归因于3D多孔纳米片网络，增强的电导率以及具有丰富价态Ni2P的Ni2 +和P-的两个活性成分。

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  • 来源
    《Advanced Functional Materials》 |2015年第48期|7530-7538|共9页
  • 作者

    Zhou Kai; Zhou Weijia; Yang Linjing; Lu Jia; Cheng Shuang; Mai Wenjie; Tang Zhenghua; Li Ligui; Chen Shaowei;

  • 作者单位

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    Jinan Univ, Dept Phys, Guangzhou 510632, Guangdong, Peoples R China|Jinan Univ, Siyuan Lab, Guangzhou 510632, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;

    S China Univ Technol, New Energy Res Inst, Sch Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China|Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA;

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  • 正文语种 eng
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  • 关键词

    asymmetrical supercapacitor; nanosheets array; nickel phosphide; phosphorization; ultrahigh specific capacitance;

    机译：不对称超级电容器纳米片阵列磷化镍磷化超高比电容;

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