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首页> 外文期刊>Advanced Functional Materials >Atomic-Level Coupled Interfaces and Lattice Distortion on CuS/NiS2 Nanocrystals Boost Oxygen Catalysis for Flexible Zn-Air Batteries
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Atomic-Level Coupled Interfaces and Lattice Distortion on CuS/NiS2 Nanocrystals Boost Oxygen Catalysis for Flexible Zn-Air Batteries

机译：CuS / NiS2纳米晶体上的原子级耦合界面和晶格畸变增强了柔性Zn-空气电池的氧催化作用

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摘要

The exploration of highly efficient nonprecious metal bifunctional electrocatalysts to boost oxygen evolution reaction and oxygen reduction reaction is critical for development of high energy density metal-air batteries. Herein, a class of CuS/NiS2 interface nanocrystals (INs) catalysts with atomic-level coupled nanointerface, subtle lattice distortion, and plentiful vacancy defects is reported. The results from temperature-dependent in situ synchrotron-based X-ray absorption fine spectroscopy and electron spin resonance spectroscopy demonstrate that the lattice distortion of 14.7% in CuS/NiS2 caused by the strong Jahn-Teller effect of Cu, the strong atomic-level coupled interface of CuS and NiS2 domains, and distinct vacancy defects can provide numerous effective active sites for their excellent bifunctional performance. A liquid Zn-air battery with the CuS/NiS2 INs as air electrode displays a large peak power density (172.4 mW cm(-2)), a high specific capacity (775 mAh g(Zn)(-1)), and long cycle life (up to 83 h), making the CuS/NiS2 INs among the best bifunctional catalysts for Zn-air battery. More remarkably, the flexible CuS/NiS2 INs-based solid-state Zn-air batteries can power the LED after twisting, making them be promising in portable and wearable electronic devices.
机译：探索高效的非贵金属双功能电催化剂以促进氧释放反应和氧还原反应对于开发高能量密度金属空气电池至关重要。在本文中，报道了一类具有原子级偶联纳米界面，细微晶格畸变和大量空位缺陷的CuS / NiS2界面纳米晶体（INs）催化剂。基于温度的原位基于同步加速器的X射线吸收精细光谱和电子自旋共振光谱的结果表明，CuS / NiS2中的14.7％晶格畸变是由于Cu的强Jahn-Teller效应，强原子级引起的。 CuS和NiS2域的耦合界面，以及明显的空位缺陷，可因其出色的双功能性能而提供大量有效的活性位点。以CuS / NiS2 INs作为空气电极的液态Zn-空气电池显示出大的峰值功率密度（172.4 mW cm（-2）），高的比容量（775 mAh g（Zn）（-1））和长的循环寿命（长达83小时）使CuS / NiS2 INs成为用于锌空气电池的最佳双功能催化剂之一。更为显着的是，基于CuS / NiS2 INs的柔性固态Zn-air电池可以在扭曲后为LED供电，使其在便携式和可穿戴电子设备中很有前途。

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  • 来源
    《Advanced Functional Materials》 |2017年第42期|1703779.1-1703779.9|共9页
  • 作者

    An Li; Li Yuxuan; Luo Mingchuan; Yin Jie; Zhao Yong-Qing; Xu Cailing; Cheng Fangyi; Yang Ying; Xi Pinxian; Guo Shaojun;

  • 作者单位

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China|Peking Univ, BIC ESAT, Coll Engn, Beijing 100871, Peoples R China;

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Nankai Univ, Key Lab Adv Energy Mat Chem, Minist Educ, Coll Chem, Tianjin 300071, Peoples R China;

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Lanzhou Univ, State Key Lab Appl Organ Chem, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Gansu, Peoples R China|Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Gansu, Peoples R China;

    Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China|Peking Univ, BIC ESAT, Coll Engn, Beijing 100871, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    atomic-level coupling; coupled interfaces; CuS/NiS2 nanocrystals; lattice distortions; Zn-air batteries;

    机译：原子级耦合耦合界面CuS / NiS2纳米晶体晶格畸变锌空气电池;

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