Solar redox flow batteries (SRFBs) integrate solar energy conversion devices and redox flow batteries (RFBs) to realize the flexible storage/utilization of solar energy by charging/discharging redox species, and electricity is the output of a SRFB. As a beneficial supplement, the charged redox species could be also used as the energy carrier to drive chemical reactions. Herein, targeting an important H₂S splitting reaction, a new SRFB based on H₄[SiW₁₂^VIO₄₀]/H₆[SiW₁₀^VIW₂^VO₄₀] and Fe²⁺/Fe³⁺ redox species and perovskite solar cells is typically designed and constructed. A solar-to-chemical energy conversion efficiency of more than 15.2% is achieved during the charging step. The chemical energy stored in redox species is subsequently discharged to realize H₂ and sulfur production on nonprecious catalysts. A net solar energy conversion efficiency of 2.9% is obtained in the whole cycle. This work illustrates the importance of a rational process and material engineering toward cost-effective and flexible chemical conversion via SRFBs.

中文翻译：

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高性能太阳能氧化还原液流电池，可有效实现硫化氢的整体分离

太阳能氧化还原液流电池（SRFB）集成了太阳能转换设备和氧化还原液流电池（RFB），通过对氧化还原物质进行充电/放电来灵活地存储/利用太阳能，而电力是SRFB的输出。作为有益的补充，带电的氧化还原物质也可以用作驱动化学反应的能量载体。在此，针对重要的H ₂ S分裂反应，基于H ₄ [SiW ₁₂ ^VI O ₄₀ ] / H ₆ [SiW ₁₀ ^VI W ₂ ^V O ₄₀ ]和Fe ²⁺ / Fe ³⁺的新SRFB通常设计和构造氧化还原物质和钙钛矿太阳能电池。在充电步骤中实现了超过15.2％的太阳能转化为化学能的效率。随后释放存储在氧化还原物质中的化学能，以在非贵重催化剂上实现H ₂和硫的产生。在整个循环中，太阳能净转换效率为2.9％。这项工作说明了合理的工艺和材料工程对于通过SRFB进行具有成本效益的灵活化学转化的重要性。