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Facile preparation of N-doped MnO/rGO composite as an anode material for high-performance lithium-ion batteries

机译：方便地制备N掺杂MnO / rGO复合材料作为高性能锂离子电池的负极材料

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摘要

An N-doped MnO/rGO composite (N-MnO/rGO) was successfully fabricated by a one-step hydrothermal method in which histidine and potassium permanganate (KMnO4) reacted in water containing graphene oxide, and the product was then calcinated in a nitrogen (N-2) atmosphere. The N-MnO/rGO presents an excellent lithium-storage capability. It shows a high reversible specific capacity of 1020 mA h g(-1) at a current density of 200 mA g(-1) after 150 cycles and 760 mA h g(-1) at a current density of 500 mA g(-1) after 200 cycles. Meanwhile, the N-MnO/rGO sample presents a stable rate capability from 100 to 2000 mA g(-1). Even at 2000 mA g(-1), the electrode delivers 335 mA h g(-1), which is higher than the capability for the pure MnO particles and rGO sheets. The outstanding electrochemical performances of the N-MnO/rGO electrodes may be attributed to the combined effect of the rGO with N-doping that can effectively buffer the large volume expansion of the MnO particles and can enhance the transport rates of lithium ions and electrons during lithium cycling.
机译：通过一步水热法成功地制备了N掺杂的MnO / rGO复合材料（N-MnO / rGO），其中组氨酸和高锰酸钾（KMnO4）在含氧化石墨烯的水中反应，然后将产品在氮气中煅烧（N-2）气氛。 N-MnO / rGO具有出色的锂存储能力。它显示了150次循环后在200 mA g（-1）的电流密度下为1020 mA hg（-1）的高可逆比容量，在500 mA g（-1）的电流密度下为760 mA hg（-1） 200个周期后。同时，N-MnO / rGO样品具有100至2000 mA g（-1）的稳定倍率能力。即使在2000 mA g（-1）时，电极也可提供335 mA h g（-1），这比纯MnO颗粒和rGO薄片的能力还高。 N-MnO / rGO电极出色的电化学性能可能归因于rGO与N掺杂的结合作用，可以有效地缓冲MnO颗粒的大体积膨胀并可以提高锂离子和电子在传输过程中的传输速率锂循环。

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  • 来源
    《Applied Surface Science》 |2019年第28期|470-477|共8页
  • 作者

    Pei Xian-Yinan; Mo Dong-Chuan; Lyu Shu-Shen; Zhang Jian-Hui; Fu Yuan-Xiang;

  • 作者单位

    Sun Yat Sen Univ, Sch Chem Engn & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Chem Engn & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Chem Engn & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Guangdong Engn Technol Res Ctr Adv Thermal Contro, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Chem Engn & Technol, Guangzhou 510275, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    MnO/rGO composite; N-doped; Anode; High-performance; Lithium-ion batteries;

    机译：MnO / rGO复合材料;掺氮;阳极;高性能;锂离子电池;

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