Smart Solar-Metal-Air Batteries Based on BiOCl Photocorrosion for Monolithic Solar Energy Conversion and Storage.
Smart Solar-Metal-Air Batteries Based on BiOCl Photocorrosion for Monolithic Solar Energy Conversion and Storage.
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DOI：
10.21203/rs.3.rs-689298/v1
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发表时间：
2021-08
期刊：
影响因子：
13.3
通讯作者：
Yalin Lan;Munkhbayar Batmunkh;Peng Li;Bingzhi Qian;Degang Bu;Qingyuan Zhao;Hongwei Huang;
中科院分区：
文献类型：
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作者：
Yalin Lan;Munkhbayar Batmunkh;Peng Li;Bingzhi Qian;Degang Bu;Qingyuan Zhao;Hongwei Huang;
在此，具有优异的光腐蚀和再生性能的BiOCl水凝胶膜电极作为阳极来构建新型的智能太阳能-金属-空气电池（SMAB），其结合了太阳能电池（直接光伏转换）和金属-空气电池（与大气相互作用的电能储存和释放）的特性。BiOCl（Bi ~（3+））和Bi之间的循环光腐蚀过程可以简单地通过太阳光照射和在黑暗中放置来实现。在照明时，该设备采用开路配置，从阳光中为自己充电。值得注意的是，在该系统中，转换的太阳能可以存储在SMAB中，而不需要外部帮助。在黑暗中的放电过程中，Bi 0自发地返回Bi 3+，产生电子，引发氧还原反应。在光照15 min的条件下，电极面积为1 cm 2的电池可连续放电3000 s。以Bi元素为计算对象，其理论容量为384.75 mAh g-1，显示出其在储能领域的潜在应用。这种新型的SMAB是基于BiOCl独特的光腐蚀和自氧化反应而开发的，以实现光化学能量的产生和存储。
Herein, a BiOCl hydrogel film electrode featuring excellent photocorrosion and regeneration properties acts as the anode to construct a novel type of smart solar-metal-air batteries (SMABs), which combines the characteristics of solar cells (direct photovoltaic conversion) and metal-air batteries (electric energy storage and release interacting with atmosphere). The cyclic photocorrosion processes between BiOCl (Bi3+ ) and Bi can simply be achieved by solar light illumination and standing in the dark. Upon illumination, the device takes open-circuit configuration to charge itself from the sunlight. Notably, in this system, the converted solar energy can be stored in the SMABs without the need of external assistance. In the discharging process in the dark, Bi0 spontaneously turns back to Bi3+ producing electrons to induce the oxygen reduction reaction. With an illumination of 15 min, the battery with an electrode area of 1 cm2 can be continuously discharged for ≈3000 s. Taking elemental Bi as the calculation object, the theoretical capacity of the SMABs is 384.75 mAh g-1 , showing its potential application in energy storage. This novel type of SMABs is developed based on the unique photocorrosive and self-oxidation reaction of BiOCl to achieve photochemical energy generation and storage.