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首页> 外文期刊>Applied Surface Science >Hierarchical NiO@NiS@graphene nanocomposite as a sustainable counter electrode for Pt free dye-sensitized solar cell
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Hierarchical NiO@NiS@graphene nanocomposite as a sustainable counter electrode for Pt free dye-sensitized solar cell

机译：分层NiO @ NiS @ graphene纳米复合材料作为无铂染料敏化太阳能电池的可持续对电极

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摘要

Recent studies in DSSC has been concentrated on developing counter electrode (CE) with low cost materials which has high power conversion efficiency, as well as high catalytic property. NiO has been studied as CE for high short circuit current in DSSC because of its wide bandgap. In this work nickel oxide@nickel sulfide@ graphene (NiO@NiS@G) nanocomposite was synthesized by hydrothermal method. Structural composition of NiO@NiS@G nanocomposite was revealed by X-ray diffraction (XRD) and confirmed the formation of NiO@ NiS@G nanocomposites. Raman spectroscopy is the most effective tool for the analysis of carbon-based materials. The D band and G band of Raman spectrum confirmed the conversion of graphene (G) from graphene oxide (GO). X-ray photoelectron spectroscopy (XPS) shows the presence of Ni, O, C and S atoms in the composition. The morphology analysis revealed the formation of NiO@NiS nanoplates anchored on the surface of the graphene sheets. The as-synthesized materials were coated on FTO (fluorine-doped fin oxide) substrate by spray coat technique and their catalytic properties were studied. The electrochemical activity (peak separation Epp) of NiO@NiS@G nanocomposite (391 mV) was high compared to NiO@NiS (496 mV) and exhibited excellent stability compared with NiO@NiS. Further, the charge transfer resistance of commercial N, NiO@NiS@G, and NiO@NiS was measured by Electrochemical Impedance Spectroscopy (EIS), with the resistance values of 15.7, 23.2, and 36.8 Omega, respectively. The efficiency of a solar cell with NiO@NiS@G is 2.10% which is high compared with NiO@NiS (1.68%).
机译：DSSC的最新研究集中在开发具有低成本材料的对电极（CE），该材料具有高功率转换效率以及高催化性能。由于NiO具有较宽的带隙，因此已被研究用作DSSC中高短路电流的CE。本文通过水热法合成了氧化镍@硫化镍@石墨烯（NiO @ NiS @ G）纳米复合材料。 X射线衍射（XRD）揭示了NiO @ NiS @ G纳米复合材料的结构组成，并证实了NiO @ NiS @ G纳米复合材料的形成。拉曼光谱法是分析碳基材料的最有效工具。拉曼光谱的D带和G带证实了石墨烯（G）从氧化石墨烯（GO）的转化。 X射线光电子能谱法（XPS）显示了组合物中存在Ni，O，C和S原子。形态分析揭示了锚定在石墨烯片表面上的NiO @ NiS纳米板的形成。通过喷涂技术将合成后的材料涂覆在FTO（氟掺杂的氧化鳍片）基板上，并研究了它们的催化性能。与NiO @ NiS（496 mV）相比，NiO @ NiS @ G纳米复合材料（391 mV）的电化学活性（峰分离Epp）高，并且具有极好的稳定性。此外，通过电化学阻抗谱（EIS）测量了商品N，NiO @ NiS @ G和NiO @ NiS的电荷转移电阻，其电阻值分别为15.7、23.2和36.8Ω。 NiO @ NiS @ G的太阳能电池的效率为2.10％，比NiO @ NiS（1.68％）高。

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  • 来源
    《Applied Surface Science》 |2020年第31期|144010.1-144010.8|共8页
  • 作者

    Silambarasan K.; Archana J.; Athithya S.; Harish S.; Ganesh R. Sankar; Navaneethan M.; Ponnusamy S.; Muthamizhchelvan C.; Hara K.; Hayakawa Y.;

  • 作者单位

    SRM Inst Sci & Technol Funct Mat & Energy Devices Lab Dept Phys & Nanotechnol Kattankulathur 603203 India;

    SRM Inst Sci & Technol Funct Mat & Energy Devices Lab Dept Phys & Nanotechnol Kattankulathur 603203 India|Shizuoka Univ Elect Res Inst Naka Ku 3-5-1 Johoku Hamamatsu Shizuoka 4328011 Japan;

    Shizuoka Univ Grad Sch Sci & Technol Naka Ku 3-5-1 Johoku Hamamatsu Shizuoka 4328011 Japan;

    SRM Inst Sci & Technol Funct Mat & Energy Devices Lab Dept Phys & Nanotechnol Kattankulathur 603203 India|SRM Inst Sci & Technol NRC Fac Engn & Technol Kattankulathur 603203 India;

    Shizuoka Univ Grad Sch Sci & Technol Naka Ku 3-5-1 Johoku Hamamatsu Shizuoka 4328011 Japan|Shizuoka Univ Elect Res Inst Naka Ku 3-5-1 Johoku Hamamatsu Shizuoka 4328011 Japan;

    Shizuoka Univ Elect Res Inst Naka Ku 3-5-1 Johoku Hamamatsu Shizuoka 4328011 Japan;

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  • 正文语种 eng
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  • 关键词

    NiO@NiS@G; Nanoplates; Counter electrode; Grapheme; Electrochemical activity;

    机译：NiO @ NiS @ G;纳米板对电极;字素电化学活性;

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