纳米杆状Co_9S_8的原位制备及其染料敏化电池对电极性能研究  

In situ preparation of nanorods Co_9S_8 and their study on the performances of dye sensitized solar cells

作　　者：赵亚强 汪佳丽[1] 郑力 黄祥平[1] 孙小华 ZHAO Yaqiang;WANG Jiali;ZHENG li;HUANG Xiangping;SUN Xiaohua(College of Science,China Three Gorges University,Yichang 443002,Hubei Province,China;College of Materials and Chemical Engineering,China Three Gorges University,Yichang 443002,Hubei Province,China)

机构地区：[1]三峡大学理学院,湖北宜昌443002 [2]三峡大学材料与化工学院,湖北宜昌443002

出　　处：《电子元件与材料》2019年第2期49-56,共8页Electronic Components And Materials

基　　金：国家自然科学基金(51602176;51602175)

摘　　要：寻找无铂、无FTO、导电性好且电催化性能优异的对电极对染料敏化电池的研究具有重大意义。本工作采用溶胶凝胶退火工艺在石墨纸基底上制备了Co_9S_8纳米杆,并用作染料敏化太阳能电池对电极。通过扫描电子显微镜、X射线衍射、透射电镜、循环伏安曲线、电化学阻抗谱、Tafel极化曲线以及光伏特性曲线分别对其形貌、物相、电催化活性及稳定性、光伏性能等进行研究。分析结果表明在柔性石墨纸上滴涂两次前驱体之后退火的样品表面生长有更为密集的Co_9S_8纳米杆,并且该样品具有良好的电催化活性以及优良的稳定性,与Pt电极相比(6.75%),其组装的电池具有更优异的光电转换效率(7.28%)。Synthesis of counter electrodes(CEs)with Pt-free,FTO-Free,good conductivity and excellent electrocatalytic activity is significant for the study of dye-sensitized solar cells(DSSCs).The nanorods Co9 S8 were prepared by sol-gel annealing process on graphite paper(GP)substrate,and then were used as the CEs of DSSCs.By scanning electron microscopy(SEM),X ray diffraction(XRD),transmission electron microscope(TEM),cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),Tafel polarization curve,cycle stability test and photoelectric current density-voltage characteristic curves(JV),the morphology,phase and electrochemical performance were researched respectively.The results show that Co9 S8 nanorods grow densely on the flexible graphite paper of annealed samples after precursors drip twice,and it exhibites excellent conductivity,electrocatalytic activity and stability.Compared with Pt electrode(6.75%),its photoelectric transformation efficiency achieves 7.28%.

关 键 词：染料敏化太阳能电池 对电极 Co9S8纳米杆 电催化活性 

分 类 号：TM914.4[电气工程—电力电子与电力传动]