Axle-sleeve Structured MWCNTs/Polyaniline Composite Film as Cost-effective Counter-Electrodes for High Efficient Dye-Sensitized Solar Cells
Axle-sleeve Structured MWCNTs/Polyaniline Composite Film as Cost-effective Counter-Electrodes for High Efficient Dye-Sensitized Solar Cells
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DOI：
10.1016/j.electacta.2013.12.059
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发表时间：
2014-03
影响因子：
6.6
通讯作者：
Haihong Niu;Shengxian Qin;X. Mao;Shouwei Zhang;Renbao Wang;L. Wan;Jinzhang Xu;S. Miao
中科院分区：
文献类型：
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作者：
Haihong Niu;Shengxian Qin;X. Mao;Shouwei Zhang;Renbao Wang;L. Wan;Jinzhang Xu;S. Miao
制备了多壁碳纳米管（MWCNTs）和聚苯胺（PANI）的轴-套筒结构复合材料，对其进行了表征，并将其用作染料敏化太阳能电池（DSSC）的对电极。该复合材料是在酸性介质中，用过硫酸铵使苯胺与羧基化的多壁碳纳米管共聚而成。采用旋涂法制备了多壁碳纳米管/聚苯胺（MWCNTs/PANI）复合薄膜，并在N2气氛下进行了热处理。利用扫描电镜（SEM）、透射电镜（TEM）和能谱仪（EDS）对复合材料的微观结构进行了研究。通过紫外-可见吸收光谱、X射线光电子能谱（XPS）、拉曼光谱和红外光谱等手段研究了PANI在MWCNTs上的包覆层以及MWCNTs与PANI之间新形成的化学键。采用循环伏安法（CV）和电化学阻抗谱（EIS）研究了MWCNTs/PANI复合材料中多级孔结构和轴套结构对电催化活性的影响。与丝网印刷Pt CE组成的DSSC（η= 7.59%）相比，用MWCNTs/PANI作为CE组装的DSSC表现出7.21%的相当的能量转换效率（η）。这些有前途的结果提出了一个潜在的应用MWCNTs/聚苯胺在成本效益的DSSC。
Axle-sleeve structured composite materials made with multi-walled carbon nanotubes (MWCNTs) and polyaniline (PANI) were prepared, characterized, and employed as cost-effective counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). The composite was synthesized by co-polymerization of aniline with carboxylated MWCNTs by using ammonium persulfate in the acidic medium. Thin films of MWCNTs/PANI were prepared via a spin coating technique followed by thermal treatment in N2atmosphere. The micro-structure of the composite was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) linked with energy dispersive spectroscopy (EDS). The coating layer of PANI on the MWCNTs and new-formed chemical bonds between MWCNTs and PANI was studied by UV-Vis absorption, X-ray photoelectron spectroscopy (XPS), Raman and FT-IR spectroscopic means. The effect of the multiple-level porosity or the axle-sleeve structures in the composite of MWCNTs/PANI on the electro-catalytic activity was investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopic (EIS) analysis. The DSSCs assembled with MWCNTs/PANI as CEs exhibit a comparable energy conversion efficiency (η) of 7.21% as compared to that of a DSSC consisting of a screen-printed Pt CE (η= 7.59%). These promising results propose a potential application of MWCNTs/PANI in cost-effective DSSCs.