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首页> 外文期刊>ACS applied materials & interfaces >Facile Dual-Ligand Modulation Tactic toward Nickel–Cobalt Sulfides/Phosphides/Selenides as Supercapacitor Electrodes with Long-Term Durability and Electrochemical Activity
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Facile Dual-Ligand Modulation Tactic toward Nickel–Cobalt Sulfides/Phosphides/Selenides as Supercapacitor Electrodes with Long-Term Durability and Electrochemical Activity

机译：适用于镍钴硫化物/磷化酯/硒化物作为具有长期耐久性和电化学活性的超级电容器电极的抗体的双配体调制术

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摘要

The use of high electrochemical active binary nickel–cobalt sulfides/phosphides/selenides (Ni–Co–X, X = S, P, Se) as electrochemical energy storage materials still has a space for improvement because they become electrochemically unstable during long-term use. Herein, a facile and cost-effective dual-ligand synergistic modulation tactic is described to substantially improve the durability of Ni–Co–X (X = S, P, Se) at the atomic level by partially substituting S, P, and Se ligands into the nickel–cobalt hydroxide precursor, respectively. Remarkably, the dual-ligand electrodes on Ni-foam achieve superior durability and high electrochemical activity when used as positive electrodes in supercapacitors. Impressively, the density functional theory calculations demonstrate that the OH ligand in NiCo_(2)(MOH)_(x ) (M = S, P, Se) could attract electrons from metal–S/metal–P/metal–Se bonds to the metal–O bond, enhancing the binding energy of metal–S/metal–P/metal–Se bonds and improving the long-term durability of Ni–Co–X (X = S, P, Se) in alkaline electrolytes. Moreover, OH and S/P/Se ligands could effectively alter the electron structure and result in favorable electrochemical activity. Overall, this tactic could offer an exciting avenue to achieve long-term durability and electrochemical activity of supercapacitor electrodes simultaneously.
机译：使用高电化学活性二元镍 - 硫化物/磷酸/硒化物（Ni-Co-X，X = S，P，Se）作为电化学能量储存材料仍然具有改进的空间，因为它们在长期内被电化学不稳定用。在此，描述了容易和成本有效的双配体协同调节术术，通过部分地替代S，P和Se配体，基本上提高了原子水平的Ni-Co-x（X = S，P，Se）的耐久性分别进入氢氧化钴前体。值得注意的是，当用作超级电容器中的正电极时，Ni-泡沫上的双配体电极实现优异的耐久性和高电化学活性。令人印象深刻地，密度函数理论计算表明，NicO_（2）（MOH）（MOH）_（MOH）_（X）（M = S，P，SE）中的OH配体可以吸收金属-S /金属-P /金属的电子 - Se键合到金属-O键，增强金属-S /金属-P /金属-SE键的结合能量，提高碱性Ni-Co-X（X = S，P，SE）的长期耐久性电解质。此外，OH和S / P / SE配体可以有效改变电子结构并导致有利的电化学活性。总体而言，这种策略可以提供令人兴奋的途径，以同时实现超级电容器电极的长期耐久性和电化学活性。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第44期|共8页
  • 作者

    Dongxuan Guo; Yan Zhang; Weifeng Sun; Dawei Chu; Bonan Li; Lichao Tan; Huiyuan Ma; Haijun Pang; Xinming Wang; Lulu Zhang;

  • 作者单位

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    Center on Translational Neuroscience College of Life and Environmental Sciences Minzu University of China;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

    School of Materials Science and Engineering College of Chemical and Environmental Engineering Harbin University of Science and Technology;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    electrochemical activity; stability; atomic level; dual-ligand; supercapacitor;

    机译：电化学活动;稳定性;原子水平;双配体;超级电容器;

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