电催化剂
析氧
过电位
材料科学
异质结
电池(电)
开路电压
氧化锡
光电子学
电化学
化学工程
电极
兴奋剂
电压
化学
电气工程
物理化学
功率(物理)
物理
量子力学
工程类
作者
Bingzhi Qian,Yu Zhang,Xing Hou,Degang Bu,Kai Zhang,Yalin Lan,Yuewen Li,Shuo Li,Tianyi Ma,Xi‐Ming Song
出处
期刊:Small
[Wiley]
日期:2021-12-04
卷期号:18 (7)
被引量:17
标识
DOI:10.1002/smll.202103933
摘要
Effective utilization of solar energy in battery systems is a promising solution to achieve sustainable and green development. In this work, a photoassisted Fe-air battery (PFAB) with two photoelectrodes of ZnO-TiO2 heterostructure and polyterthiophene (pTTh)-coated CuO (pTTh-CuO) grown on fluorine-doped tin oxide (FTO) is proposed. The band structure of semiconductors and the charge-transfer mechanism of heterostructure are studied. The electrochemical results show that the photogenerated electrons and holes play key roles in reducing the oxygen evolution reaction (OER)/oxygen reduction reaction (ORR) overpotential in the discharging and charging processes, respectively. The short-circuit current density, the open-circuit voltage, and the maximum power output of the PFAB can reach 34.28 mA cm-2 , 1.15 V, and 5.69 mW cm-2 upon illumination, respectively. The photoassisted Fe-air battery exhibits a low charge voltage of 0.64 V for ZnO-TiO2 as photoelectrode and a discharge voltage of 1.38 V for pTTh-CuO as a photoelectrode at 0.1 mA cm-2 .
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