Utilizing solar energy to improve the oxygen evolution reaction kinetics in zinc-air battery
Utilizing solar energy to improve the oxygen evolution reaction kinetics in zinc-air battery
复制标题
利用太阳能改善锌空气电池析氧反应动力学
DOI：
10.1038/s41467-019-12627-2
复制
发表时间：
2019-10-18
影响因子：
16.6
通讯作者：
Hu, Wenbin
中科院分区：
文献类型：
--
作者：
Liu, Xiaorui;Yuan, Yifei;Hu, Wenbin
直接收集太阳能用于电池充电代表了低成本、绿色、高效和可持续的电化学储能的最终解决方案。在这里，我们设计了一种可充电锌空气电池的阳光促进策略，使充电电位明显降低到锌空气电池的理论电池电压以下。使用BiVO4或α - fe2o3空气光电极的日光促进锌空气电池在光照下分别获得了创纪录的低充电电位，分别接近1.20和1.43 V，与传统锌空气电池的典型充电电压约为2 V相比，降低了约0.5-0.8 V。发现光电极的能带结构和光电化学稳定性是决定日光促进锌空气电池充电性能的关键因素。光电极作为空气电极的引入，为开发高效利用太阳能的一体化单体锌空气电池，克服传统锌空气电池充电过电位高的缺点开辟了一条捷径。
Directly harvesting solar energy for battery charging represents an ultimate solution toward low-cost, green, efficient and sustainable electrochemical energy storage. Here, we design a sunlight promotion strategy into rechargeable zinc-air battery with significantly reduced charging potential below the theoretical cell voltage of zinc-air batteries. The sunlight-promoted zinc-air battery using BiVO4 or alpha-Fe2O3 air photoelectrode achieves a record-low charge potential of similar to 1.20 and similar to 1.43 V, respectively, under illumination, which is lowered by similar to 0.5-0.8 V compared to the typical charge voltage of similar to 2 V in conventional zinc-air battery. The band structure and photoelectrochemical stability of photoelectrodes are found to be key factors determining the charging performance of sunlight-promoted zinc-air batteries. The introduction of photoelectrode as an air electrode opens a facile way for developing integrated single-unit zinc-air batteries that can efficiently use solar energy to overcome the high charging overpotential of conventional zinc-air batteries.