Achieving high current densities without thermal performance degradation at high temperatures is one of the main challenges for enhancing the competitiveness of photo-electrochemical energy storage systems. We describe a system that overcomes this challenge by incorporating an integrated photoelectrode with a redox flow cell, which functions as a coolant for the excess heat from the photo-absorber. We perform quantitative analyses to theoretically validate and highlight the merit of the system. Practical operation parameters, including daily temperature and redox reaction kinetics, are modeled with respect to heat and charge transfer mechanisms. Our analyses show a profound impact on the resulting solar-to-chemical efficiencies and stored power, which are 21.8% higher than that of a conventional photovoltaic-assisted energy storage system. This paves the way for reassessing the merit of photovoltaic-integrated systems, which have hitherto been underrated as renewable energy storage systems.

中文翻译：

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隐藏的光充电图：可太阳能充电的氧化还原流通池系统的热电化学方法

实现高电流密度而不在高温下降低热性能是增强光电化学能量存储系统竞争力的主要挑战之一。我们描述了一种系统，该系统通过将集成的光电极与氧化还原流通池结合在一起而克服了这一挑战，氧化还原流通池用作冷却剂，吸收来自光吸收剂的多余热量。我们进行定量分析以从理论上验证并突出系统的优点。实际操作参数，包括日温度和氧化还原反应动力学，是针对热和电荷转移机制进行建模的。我们的分析表明，其对最终的太阳能化学效率和储能产生了深远影响，比传统的光伏辅助储能系统高21.8％。