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Author(s): João Azevedo
Thorsten Seipp
Jens Burfeind
Célia Sousa
Anders Bentien
João Pedro Araújo
Adélio Mendes
Title: Unbiased solar energy storage: Photoelectrochemical redox flow battery
Issue Date: 2016
Abstract: Electricity from renewable energy sources is craving for efficient storage technologies, in particularsolar industry, to enable practical small-scale solutions for residential and offices use. The beststationary technology is probably the redox flow batteries. This article proposes the directconversion of sunlight into electrochemical energy stored in a redox flow battery. A photoelectrochemicalcell is used to charge a vanadium redox flow cell (CdS(s)|V3+, VO2+||V3+, V2+|CarbonFelt(s), E0=0.6 VNHE). A CdS thin film photoelectrode is prepared to directly charge the cell, pairsV3+/VO2+. CdS photoanode exhibits competitive photocurrents, when compared to other photoelectrochemicaldevices, and yields enough photovoltage to charge the vanadium battery up to 75%with no external bias. An overlayer of CdSe improves the performance of CdS with current densitiesup to ca. 1.4 mA cm2. Finally, a tandem configuration is tested using a dye-sensitized solar cell anda CdS photoanoade creating 1.3 V of photovoltage. This tandem arrangement proves to chargeconventional all vanadium redox cell (DSC/CdS(s)|VO2+, VO2+||V3+, V2+|Carbon Felt(s), E0=1.2 VNHE)without external bias.
Subject: Ciências Tecnológicas
Technological sciences
Related Information: info:eu-repo/grantAgreement/COMISSÃO EUROPEIA/7.º Programa-Quadro de IDT/321315/Building Integrated Dye Sensitized Solar Cells/BI-DSC
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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