Organic‐inorganic Hybrid Perovskite‐Based Light‐Assisted Li‐oxygen Battery with Low Overpotential. Issue 21 (5th October 2022)

• Record Type: Journal Article
• Authors: Fan, Rundong; Wu, Yizeng; Xie, Haipeng; Gao, Yongli; Wang, Lina; Zhao, Bo; Li, Dong; Liu, Shaocheng; Zhang, Yu; Kong, Hua; Li, Yujing; Chen, Qi; Cao, Anyuan; Zhou, Huanping
• Is Part Of: ChemSusChem. Volume 15:Issue 21(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-05
• Subjects: batteries -- electrochemistry -- energy storage -- hybrid perovskites -- photocatalysis; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202201473
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Organic‐inorganic hybrid perovskites have emerged in the last decade as promising semiconductors due to the excellent optoelectronic properties. This kind of perovskites exhibited respectable photocatalytic activities toward potential application in battery; however, the instability issue still hindered their practical use. Herein, a hybrid perovskite material, 4, 4'‐ethylenedipyridinium lead bromide [(4, 4'‐EDP)Pb2 Br6 ], was assembled onto the carbon materials to function as photoelectrode of the Li‐oxygen battery. The strong cation‐π interactions between the A‐site cations enabled this hybrid perovskite to endure the cycling process as well as the exposure to battery electrolyte and oxygen. Benefitting from the photo‐generated carriers of the photoelectrode under illumination, the formation/decomposition of the discharge product was accelerated, thus leading to a reduced overpotential from 1.3 V to an optimized 0.5 V compared to the Li‐oxygen battery without illumination. The overpotential could be maintained lower than 0.9 V after cycling for 170 h. Furthermore, when exposed to the sunlight, the charging voltage was reduced by over 0.2 V. The intrinsic stability and strong light absorption of perovskites together with the optimized perovskite/carbon cathode interfaces contributed to the improved performance under different light sources without complex material design, which shed light on the exploration of organic‐inorganic hybrid perovskites in Li‐oxygen battery applications. Abstract : Hybrid theory : A hybrid perovskite material, 4, 4'‐ethylenedipyridinium lead bromide, is assembled onto carbon material to function as photoelectrode of the Li‐oxygen battery, leading to a reduced overpotential of 0.5 V compared to the Li‐oxygen battery without illumination (1.3 V). The overpotential can be maintained lower than 0.9 V after cycling for 170 h.