Bio-based carbon-enhanced tungsten-based bimetal oxides as counter electrodes for dye-sensitized solar cells
Bio-based carbon-enhanced tungsten-based bimetal oxides as counter electrodes for dye-sensitized solar cells
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生物基碳增强钨基双金属氧化物作为染料敏化太阳能电池的对电极
DOI：
10.1016/j.jpowsour.2019.03.054
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发表时间：
2019-05
影响因子：
9.2
通讯作者：
Si Yiming
中科院分区：
文献类型：
--
作者：
Zhang Yangliang;Yun Sining;Wang Chen;Wang Ziqi;Han Feng;Si Yiming
钨基双金属氧化物首次被用作染料敏化太阳能电池的对电极催化剂。本研究通过水热法和退火法将多孔生物基碳引入钨基双金属氧化物中，以改善钨基双金属氧化物的电催化性能。以多孔生物基碳作为结构导向剂，观察到氧化钨钴从纳米棒到纳米花的结构转变。生物基碳具有多孔的三维网络结构，在钨基双金属氧化物/生物基碳复合材料中作为电催化载体材料，减少了钨基双金属氧化物的团聚和晶粒尺寸，并提供了快速的电子转移路径。由于催化钨基双金属氧化物和导电生物基碳的协同作用，钨基双金属氧化物/生物基碳复合电极表现出增强的电催化活性和降低的电荷转移电阻。采用氧化钨镍/生物基碳对电极的染料敏化太阳能电池的功率转换效率高达7.08%，超过了采用Pt对电极的染料敏化太阳能电池的6.46%。本工作提出了设计和制造用于能量转换装置的多孔生物基碳支撑无机化合物材料的一般策略。
Tungsten-based bimetal oxides are first used as counter electrode catalysts for dye-sensitized solar cells. In this work, we introduce porous bio-based carbon into tungsten-based bimetal oxide by hydrothermal and annealing methods to improve the electrocatalytic properties of tungsten-based bimetal oxides. A structure transformation from nanorod to nanoflower is observed in cobalt tungsten oxide when porous bio-based carbon is used as the structure-directing agent. Bio-based carbon, which has a porous three-dimensional network structure, serves as an electrocatalytic support material in the tungsten-based bimetal oxide/bio-based carbon composites, reducing the agglomeration and grain size of tungsten-based bimetal oxides and providing rapid electron transfer paths. Tungsten-based bimetal oxide/bio-based carbon composite counter electrodes exhibit enhanced electrocatalytic activity and reduced charge-transfer resistance because of the synergistic effects of catalytic tungsten-based bimetal oxides and conductive bio-based carbon. The dye-sensitized solar cell with nickel tungsten oxide/bio-based carbon counter electrode shows a high power conversion efficiency of 7.08%, surpassing that of dye-sensitized solar cell with Pt counter electrode (6.46%). This work presents a general strategy for designing and fabricating porous bio-based carbon support inorganic compound materials for energy conversion devices.
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