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首页> 外文期刊>Advanced Functional Materials >Novel Core-Shell FeOF/Ni(OH)(2) Hierarchical Nanostructure for All-Solid-State Flexible Supercapacitors with Enhanced Performance
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Novel Core-Shell FeOF/Ni(OH)(2) Hierarchical Nanostructure for All-Solid-State Flexible Supercapacitors with Enhanced Performance

机译：具有增强性能的全固态柔性超级电容器的新型核-壳FeOF / Ni（OH）（2）分层纳米结构

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摘要

Well-controlled core-shell hierarchical nanostructures based on oxyfluoride and hydroxide are for the first time rationally designed and synthesized via a simple solvothermal and chemical precipitation route, in which FeOF nanorod acts as core and porous Ni(OH)(2) nanosheets as shell. When evaluated as electrodes for supercapacitors, a high specific capacitance of 1452 F g(-1) can be obtained at a current density of 1 A g(-1). Even as the current density increases to 10 A g(-1), the core-shell hybrid still reserves a noticeable capacitance of 1060 F g(-1), showing an excellent rate capacity. Furthermore, all-solid-state flexible asymmetric supercapacitor based on the FeOF/Ni(OH)(2) hybrid as a positive electrode and activated carbon as a negative electrode shows high power density, high energy density, and long cycling lifespan. The excellent electrochemical performance of the FeOF/Ni(OH)(2) core-shell hybrid is ascribed to the unique microstructure and synergistic effects. FeOF nanorod from FeF3 by partial substitution of fluorine with oxygen behaves as a low intrinsic resistance, thus facilitating charge transfer processes. While the hierarchical Ni(OH)(2) nanosheets with large surface area provide enough active sites for redox chemical reactions, leading to greatly enhanced electrochemical activity. The well-controllable oxyfluoride/hydroxide hybrid is inspiring, opening up a new way to design new electrodes for next-generation all-solid-state supercapacitors.
机译：首次通过简单的溶剂热和化学沉淀途径合理设计和合成了基于氧氟化物和氢氧化物的可控的核-壳层级纳米结构，其中FeOF纳米棒为核，多孔Ni（OH）（2）纳米片为壳。当评估为超级电容器的电极时，可以在1 A g（-1）的电流密度下获得1452 F g（-1）的高比电容。即使当电流密度增加到10 A g（-1）时，核壳混合型仍保留1060 F g（-1）的显着电容，显示出出色的倍率容量。此外，基于FeOF / Ni（OH）（2）杂化物的全固态柔性不对称超级电容器作为正极，活性炭作为负极，显示出高功率密度，高能量密度和长循环寿命。 FeOF / Ni（OH）（2）核-壳杂化体的优异电化学性能归因于独特的微观结构和协同效应。通过用氧部分取代氟将FeF3制成的FeOF纳米棒表现出较低的固有电阻，因此有利于电荷转移过程。虽然具有较大表面积的分层Ni（OH）（2）纳米片为氧化还原化学反应提供了足够的活性位点，导致电化学活性大大增强。易于控制的氟氧化物/氢氧化合物的混合物令人鼓舞，它开辟了一种为下一代全固态超级电容器设计新电极的新方法。

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  • 来源
    《Advanced Functional Materials》 |2017年第31期|1701014.1-1701014.10|共10页
  • 作者

    Wang Mengqiao; Li Zhaoqiang; Wang Chengxiang; Zhao Ruizheng; Li Caixia; Guo Dexiang; Zhang Luyuan; Yin Longwei;

  • 作者单位

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China;

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  • 关键词

    core-shell nanostructures; iron oxyfluoride; nickel hydroxide; rate capacity; supercapacitors;

    机译：核-壳纳米结构;氟氧化铁;氢氧化镍;倍率容量;超级电容器;

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