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Multifunctional 0D-2D Ni2P Nanocrystals-Black Phosphorus Heterostructure

机译：多功能0D-2D Ni2P纳米晶体-黑磷异质结构

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摘要

0D transition metal phosphides (TMPs) nanocrystals (NCs)-2D ultrathin black phosphorus (BP) heterostructure (Ni2P@BP) have been synthesized via a facile sonication-assisted exfoliation followed by a solvothermal process. Compared with the bare BP, the specially designed Ni2P@BP architecture can enhance the electrical conductivity (from 2.12 x 10(2) to 6.25 x 10(4) S m(-1)), tune the charge carrier concentration (from 1.25 x 10(17) to 1.37 x 10(20) cm(-3)), and reduce the thermal conductivity (from 44.5 to 7.69 W m(-1) K-1) at 300 K, which can be considered for multiple applications. As a result, the Ni2P@BP exhibits excellent Li storage properties and high hydrogen evolution reaction electrocatalytic activities. The Ni2P@BP shows improved Li diffusion kinetics (e.g., the Li ions diffusion coefficient increases from 1.14 x 10(-14) cm(2) s(-1) for pure BP nanosheets to 8.02 x 10(-13) cm(2) s(-1) for Ni2P@BP). In addition, the Ni2P@BP electrode sustains hydrogen production with almost unchanged activity over 3000 cycles, which indicates its good chemical stability when operating under strong reducing environment.
机译：通过超声辅助剥离和溶剂热法合成了0D过渡金属磷化物（TMPs）纳米晶体（NCs）-2D超薄黑磷（BP）异质结构（Ni2P @ BP）。与裸露的BP相比，经过特殊设计的Ni2P @ BP架构可以提高电导率（从2.12 x 10（2）到6.25 x 10（4）S m（-1）），调节电荷载流子浓度（从1.25 x 10（17）至1.37 x 10（20）cm（-3）），并降低300 K时的导热系数（从44.5降至7.69 W m（-1）K-1），可以考虑将其用于多种应用。结果，Ni 2 P @ BP显示出优异的锂存储性能和高的析氢反应电催化活性。 Ni2P @ BP显示出改善的Li扩散动力学（例如，Li离子扩散系数从纯BP纳米片的1.14 x 10（-14）cm（2）s（-1）增加到8.02 x 10（-13）cm（2） ）对于Ni2P @ BP为s（-1）。另外，Ni2P @ BP电极在超过3000个循环中仍维持着几乎没有变化的产氢状态，这表明在强还原性环境下操作时其化学稳定性良好。

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  • 来源
    《Advanced energy materials》 |2017年第2期|1601285.1-1601285.9|共9页
  • 作者

    Luo Zhong-Zhen; Zhang Yu; Zhang Chaohua; Tan Hui Teng; Li Zhong; Abutaha Anas; Wu Xing-Long; Xiong Qihua; Khor Khiam Aik; Hippalgaonkar Kedar; Xu Jianwei; Hng Huey Hoon; Yan Qingyu;

  • 作者单位

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, 21 Nanyang Link, Singapore 637371, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore|Northeast Normal Univ, Fac Chem, Changchun 130024, Jilin, Peoples R China;

    Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, 21 Nanyang Link, Singapore 637371, Singapore;

    Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore;

    ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way,Innovis 08-03, Singapore 138634, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

    Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore;

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  • 正文语种 eng
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  • 关键词

    black phosphorus; hydrogen evolution reaction; Li-ion batteries; Ni2P@BP heterostructure; thermal conductivity;

    机译：黑磷析氢反应锂离子电池Ni2P @ BP异质结构导热系数;

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