Photorechargeable High Voltage Redox Battery Enabled by Ta3N5 and GaN/Si Dual-Photoelectrode
Photorechargeable High Voltage Redox Battery Enabled by Ta3N5 and GaN/Si Dual-Photoelectrode
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DOI：
10.1002/adma.201700312
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发表时间：
2017-07-12
影响因子：
29.4
通讯作者：
Wang, Dunwei
中科院分区：
文献类型：
--
作者：
Cheng, Qingmei;Fan, Weiqiang;Wang, Dunwei
太阳能充电电池结合了光电化学装置和电池的优点，已成为大规模太阳能收集和存储的人工光合作用的有吸引力的替代品。然而，由于光电极的光电压较低，之前大多数无辅助光电荷的演示都是在具有低开路电位（5 mA cm(-2)）的系统上实现的。该光电极系统可以运行1.2 V碱性蒽醌/亚铁氰化物氧化还原电池，在没有外部施加电势的情况下，其理想的太阳能-化学转化效率高达3.0%。重要的是，光充电电池能够以高电压输出成功放电。
Solar rechargeable battery combines the advantages of photoelectrochemical devices and batteries and has emerged as an attractive alternative to artificial photosynthesis for large-scale solar energy harvesting and storage. Due to the low photovoltages by the photoelectrodes, however, most previous demonstrations of unassisted photocharge have been realized on systems with low open circuit potentials (5 mA cm(-2)). The photoelectrode system makes it possible to operate a 1.2 V alkaline anthraquinone/ferrocyanide redox battery with a high ideal solar-to-chemical conversion efficiency of 3.0% without externally applied potentials. Importantly, the photocharged battery is successfully discharged with a high voltage output.