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首页> 外文会议>Annual NSTI nanotechnology conference and expo >Hollow core-shell structured mesoporous MWCNT/carbon nanofiber composites by electrospinning and silica template as counter electrodes for dye-sensitized solar cells
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Hollow core-shell structured mesoporous MWCNT/carbon nanofiber composites by electrospinning and silica template as counter electrodes for dye-sensitized solar cells

机译：静电纺丝和二氧化硅模板作为对电极用于染料敏化太阳能电池的中空核壳结构介孔MWCNT /碳纳米纤维复合材料

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The multi-walled carbon nanotube (CNT)-embedded carbon nanofibers (CNT/meso-HACNF) with hollow macroporous core/mesoporous shell structure are prepared by concentric electrospinning, and subsequent stabilization, carbonization, SiO_2 template etching, and activation. A sample without SiO_2 template etching was defined as CNT/HACNF. Hollow core precursor was pyrolytic poly(methyl methacrylate) (PMMA), and carbon shell precursor was CNT/polyacrylonitrile (PAN) or fumed silica (SiO_2)/PAN or CNT/SiO_2/PAN. The CNT/meso-HACNF with hollow core/highly mesoporous shell structure represented large specific surface area and good electrical conductivity in employing as catalysts of counter electrodes (CE) for dye-sensitized solar cells (DSSCs) due to cocentric electrospinning, SiO_2 template etching, and proper thermal process. The CNT/meso-HACNF CE presents a high efficiency considering a Pt-free catalyst and and is comparable to Pt CE because of its hollow core/CNT-embeded highly mesoporous shell structure, which promote the electron and ion transfer and decrease the resistance of charge transfer owing to increasing the contact area between liquid electrolyte and CNT/meso-HACNF. Highly mesoporous CNT/meso-HACNF has a large surface area of 1033 m~2/g with a mesoporous surface area of 138 m~2/g. The efficiency of CNT/meso-HACNF increases to 6.73 %, but that of CNT/HACNF undeveloped with mesoporous structure to shell side shows 6.05 % due to without SiO_2 etching.
机译：通过同心电纺丝并随后进行稳定化，碳化，SiO_2模板蚀刻和活化，制备了具有空心大孔核/中壳壳结构的嵌入式多壁碳纳米管（CNT / meso-HACNF）。将没有SiO_2模板蚀刻的样品定义为CNT / HACNF。空心核前体是热解聚甲基丙烯酸甲酯（PMMA），碳壳前体是CNT /聚丙烯腈（PAN）或气相法二氧化硅（SiO_2）/ PAN或CNT / SiO_2 / PAN。空心/高介孔壳结构的CNT / meso-HACNF由于同心静电纺丝，SiO_2模板刻蚀而在用作染料敏化太阳能电池（DSSC）的对电极（CE）的催化剂时具有较大的比表面积和良好的导电性，并进行适当的热处理。 CNT / meso-HACNF CE考虑到无铂催化剂表现出很高的效率，并且与Pt CE相当，因为它具有中空的核/ CNT嵌入的高介孔壳结构，可促进电子和离子转移，并降低Pb CE的电阻。由于增加了液体电解质与CNT / meso-HACNF之间的接触面积，电荷转移。高度介孔的CNT / meso-HACNF具有1033 m〜2 / g的大表面积和138 m〜2 / g的介孔表面积。 CNT / meso-HACNF的效率提高到6.73％，但是由于没有进行SiO_2刻蚀，未开发出具有壳侧介孔结构的CNT / HACNF的效率为6.05％。

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