In recent years, extensive efforts were made to develop solar rechargeable flow cell (SRFC) for the capture, conversion, storage and distribution of intermittent solar energy. However, the performance of most SRFCs is far from being satisfactory and the working mechanisms are not well understood. In this work, an all-in-one SRFC (ASRFC) with Fe/AQDS redox couples and an amorphous silicon (aSi) based photoanode is designed and constructed. Originating from the fast kinetics of Fe³⁺/Fe²⁺ [k⁰’=(9.0 ± 0.1) × 10⁻³ cm s⁻¹] and AQDS/AQDSH₂ [k⁰’=(1.4 ± 0.1) × 10⁻² cm s⁻¹] together with the efficient light harvesting and charge separation of the aSi, the optimal solar-to-chemical conversion efficiency of the Fe/AQDS-based ASRFC reaches 6.5%, indicating 93% of solar energy converted by the aSi-based photoanode can be stored in the redox couples. Moreover, a record photoelectrode utilization efficiency of 70% demonstrates the well-matched energy-level between the aSi-based photoanode and the Fe/AQDS redox couples. And this is a key factor in achieving an overall solar-chemical-electricity conversion efficiency of 4.9%, which outperforms previous published SRFCs operating in air atmosphere. These results may light up the path of developing efficient solar rechargeable devices for practical solar energy utilization.

近年来，人们大力开发了可充电太阳能电池（SRFC），用于间歇性太阳能的捕获，转换，存储和分配。但是，大多数SRFC的性能远远不能令人满意，其工作机制还不清楚。在这项工作中，设计并构建了具有Fe / AQDS氧化还原对和基于非晶硅（aSi）的光阳极的多合一SRFC（ASRFC）。从Fe的快速动力学始发³⁺ / Fe的²⁺ [K ⁰ '=（9.0±0.1）×10 ^-3 厘米小号^-1 ]和AQDS / AQDSH ₂ [K ⁰ '=（1.4±0.1）×10 ^{- 2} 厘米s ^-1]以及有效的aSi的光收集和电荷分离，基于Fe / AQDS的ASRFC的最佳太阳能转化率达到6.5％，这表明基于aSi的光电阳极可以转化93％的太阳能存储在氧化还原对中。此外，创纪​​录的70％的光电极利用率证明了基于aSi的光阳极与Fe / AQDS氧化还原对之间的能量水平完全匹配。这是实现4.9％的整体太阳能-化学-电力转换效率的关键因素，该效率优于先前发布的在空气中运行的SRFC。这些结果可以为开发用于实际太阳能利用的高效太阳能可充电设备开辟道路。