色素敏化染料
辅助电极
电极
碳纤维
材料科学
化学工程
基质(水族馆)
比表面积
钛
能量转换效率
涂层
纳米技术
催化作用
化学
光电子学
冶金
复合材料
地质学
工程类
海洋学
物理化学
复合数
电解质
生物化学
作者
Xiaoyu Zhang,Xuan Wang,Ying Cao,Chengyang Liang,Shitong Geng,Haipeng Guo,Ying Liu,Yanhong Luo,Wenming Zhang,Ling Li
标识
DOI:10.1016/j.apsusc.2023.156461
摘要
A porous coating structure transition metal oxide ZnCo2O4@NiMoO4 composite was successfully synthesized on the surface of carbon paper (CP) by a simple two-step hydrothermal method as a Pt-free material for titanium mesh substrate counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). According to BET test results, the material has a high specific surface area, which can provide abundant active sites for the redox reaction of electrolytes to enhance the utilization rate of sunlight by DSSCs, and the composite materials show remarkable electrocatalytic performance in reducing iodine electrolytes and improving the photoelectric conversion efficiency (PCE) of DSSCs. Therefore, the DSSCs equipped with ZnCo2O4@NiMoO4/CP material CEs achieve a PCE of 9.30 % (with Jsc of 20.51 mA·cm−2, Voc of 0.763 V, and FF is 0.60), which is much higher than that of Pt CEs (7.36 %) under the same light conditions. This is due to the excellent catalytic ability and good electrical conductivity of the composite material. On the other hand, because the titanium mesh can increase the contact area between the electrode material and the substrate compared with the FTO substrate, and the titanium mesh has good electrical conductivity, it can enhance the diffusion ability of I-/I3- to accelerate electron transmission.
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