Wedege Kristina, Bae Dowon, Dražević Emil, Mendes Adélio, Vesborg Peter C K, Bentien Anders
Department of Engineering - Aarhus University Hangøvej 2 DK-8200 Aarhus Denmark
Department of Physics - Technical University of Denmark Fysikvej Bygning 307, DK-2800 Kgs. Lyngby Denmark
RSC Adv. 2018 Feb 8;8(12):6331-6340. doi: 10.1039/c8ra00319j. eCollection 2018 Feb 6.
Solar redox flow batteries have attracted attention as a possible integrated technology for simultaneous conversion and storage of solar energy. In this work, we review current efforts to design aqueous solar flow batteries in terms of battery electrolyte capacity, solar conversion efficiency and depth of solar charge. From a materials cost and design perspective, a simple, cost-efficient, aqueous solar redox flow battery will most likely incorporate only one semiconductor, and we demonstrate here a system where a single photocathode is accurately matched to the redox couples to allow for a complete solar charge. The single TiO protected Si photocathode with a catalytic Pt layer can fully solar charge a neutral TEMPO-sulfate/ferricyanide battery with a cell voltage of 0.35 V. An unbiased solar conversion efficiency of 1.6% is obtained and this system represents a new strategy in solar RFBs where a single silicon photocathode is paired with energetically suitable redox couples to build an integrated solar energy conversion and storage device with full realization of the energy storage capacity.
太阳能氧化还原液流电池作为一种可能的太阳能同时转换和存储的集成技术受到了关注。在这项工作中，我们从电池电解质容量、太阳能转换效率和太阳能充电深度等方面回顾了当前设计水性太阳能液流电池的努力。从材料成本和设计角度来看，一种简单、经济高效的水性太阳能氧化还原液流电池很可能只包含一种半导体，我们在此展示了一个系统，其中单个光电阴极与氧化还原对精确匹配，以实现完全的太阳能充电。带有催化铂层的单个TiO保护的Si光电阴极可以用0.35 V的电池电压对中性TEMPO-硫酸盐/铁氰化物电池进行完全太阳能充电。获得了1.6%的无偏太阳能转换效率，该系统代表了太阳能液流电池的一种新策略，其中单个硅光电阴极与能量合适的氧化还原对配对，以构建一个完全实现储能容量的集成太阳能能量转换和存储装置。
