Unbiased solar energy storage: Photoelectrochemical redox flow battery
Unbiased solar energy storage: Photoelectrochemical redox flow battery
复制标题
DOI：
10.1016/j.nanoen.2016.02.029
复制
发表时间：
2016-04-01
期刊：
影响因子：
17.6
通讯作者：
Mendes, Adelio
中科院分区：
文献类型：
--
作者：
Azevedo, Joao;Seipp, Thorsten;Mendes, Adelio
可再生能源发电迫切需要高效的存储技术，特别是太阳能行业，以便为住宅和办公室使用提供实用的小规模解决方案。最好的固定技术可能是氧化还原液流电池。本文提出将阳光直接转化为存储在氧化还原液流电池中的电化学能。光电化学电池用于对钒氧化还原流通池充电（CdS(s)垂直条V3+，VO2+与V3+平行，V2+垂直条碳毡，E-0 =0.6 V-NHE）。准备 CdS 薄膜光电极直接为电池充电，配对 V3+/VO2+。与其他光电化学器件相比，CdS 光阳极表现出有竞争力的光电流，并产生足够的光电压，在没有外部偏压的情况下为钒电池充电高达 75%。 CdSe 覆盖层可提高 CdS 的性能，电流密度高达 ca。 1.4毫安厘米(-2)。最后，使用染料敏化太阳能电池和 CdS 光阳极测试串联配置，产生类似于 1.3 V 的光电压。事实证明，这种串联排列可以对传统的全钒氧化还原电池（DSC/CdS(s)垂直棒VO2+、VO2+与V3+平行、V2+垂直棒碳毡、E-0 =1.2 V-NHE）进行充电，而无需外部偏置。 (C) 2016 年作者。由爱思唯尔有限公司出版
Electricity from renewable energy sources is craving for efficient storage technologies, in particular solar industry, to enable practical small-scale solutions for residential and offices use. The best stationary technology is probably the redox flow batteries. This article proposes the direct conversion of sunlight into electrochemical energy stored in a redox flow battery. A photoelectrochemical cell is used to charge a vanadium redox flow cell (CdS(s)vertical bar V3+, VO2+parallel to V3+, V2+vertical bar Carbon Felt(s), E-0 =0.6 V-NHE). A CdS thin film photoelectrode is prepared to directly charge the cell, pairs V3+/VO2+. CdS photoanode exhibits competitive photocurrents, when compared to other photo-electrochemical devices, 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 densities up to ca. 1.4 mA cm(-2). Finally, a tandem configuration is tested using a dye-sensitized solar cell and a CdS photoanoade creating similar to 1.3 V of photovoltage. This tandem arrangement proves to charge conventional all vanadium redox cell (DSC/CdS(s)vertical bar VO2+, VO2+parallel to V3+, V2+vertical bar Carbon Felt(s), E-0 =1.2 V-NHE) without external bias. (C) 2016 The Authors. Published by Elsevier Ltd.