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Redox active and electrically conducting cobalt telluride Nanorods/Poly(1-aminoanthraquinone) composite and photoactive Rose Bengal dye based photo-supercapacitor
Applied Materials Today ( IF 7.2 ) Pub Date : 2020-02-15 , DOI: 10.1016/j.apmt.2020.100592
Aparajita Das , Sathish Deshagani , Partha Ghosal , Melepurath Deepa

Photo-supercapacitor (PSC) allows concurrent harvesting and storage of solar energy in a single device. Cost-effective and a highly scalable novel configuration for a PSC comprising of Rose Bengal (RB) dye/cadmium sulfide (CdS)/titania (TiO2) as the photovoltaic electrode and CoTe nanorods/poly(1-aminoanthraquinone) (PAAQ) composite/carbon fabric (C-fabric) as the counter electrode (CE) combined with PAAQ/C-fabric as the symmetric supercapacitor electrodes, is presented. The two low cost photosensitizers (RB dye and CdS) permit broad utilization of the solar spectrum (blue-green and to some extent, red photons as well), and the CoTe/PAAQ composite offers a high electrocatalytic activity for polysulfide reduction, resulting in a power conversion efficiency of 8.25%. The composite as a CE outperforms the individual CEs of CoTe and PAAQ. When the illuminated solar cell is electrically connected to the PAAQ//PAAQ supercapacitor, the latter is charged to 0.77 V and it acquires an areal specific capacitance of 79.2 m F cm−2 under a galvanostatic discharge current density of 0.07 mA cm−2. This PSC shows an overall photo-electrical conversion and storage efficiency of 4.68% and it serves as a promising solution for integrating solar conversion and storage in a single device.



中文翻译:

氧化还原活性和导电碲化钴纳米棒/聚(1-氨基蒽醌)复合材料和基于光敏玫瑰孟加拉染料的光超级电容器

光电超级电容器(PSC)允许在单个设备中同时收集和存储太阳能。包含玫瑰孟加拉(RB)染料/硫化镉(CdS)/二氧化钛(TiO 2)的PSC的经济高效且高度可扩展的新颖配置)作为光伏电极,并提出了CoTe纳米棒/聚(1-氨基蒽醌)(PAAQ)复合材料/碳纤维(C-fabric)作为对电极(CE)与PAAQ / C-fabric组合作为对称超级电容器电极。两种低成本的光敏剂(RB染料和CdS)可广泛利用太阳光谱(蓝绿色,在某种程度上还包括红色光子),并且CoTe / PAAQ复合材料具有高电催化活性,可减少多硫化物,从而功率转换效率为8.25%。作为CE的复合材料优于CoTe和PAAQ的各个CE。当照明的太阳能电池与PAAQ // PAAQ超级电容器电连接时,超级电容器充电至0.77 V,并获得79.2 m F cm -2的面积比电容在恒电流放电电流密度为0.07 mA cm -2的情况下。该PSC的整体光电转换和存储效率为4.68%,是将太阳能转换和存储集成到单个设备中的有希望的解决方案。

更新日期:2020-02-15
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