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Aprotic lithium-oxygen batteries (LOBs) have been regarded as novel energy storage devices due to their excellent specific energy density, yet the large discharge/charge overpotentials remain a formidable obstacle to be overcome. Photo-assisted battery has been verified as one of the most effective approaches to reduce the overpotentials of LOBs. Herein, ZnO nanorod arrays were in-situ grown on carbon textile, followed by in-situ transformation to form Zn-HHTP@ZnO (HHTP, Hexahydroxytriphenylene) heterojunction photocatalysts. The porous structure and conjugated system of highly conductive Zn-HHTP provide efficient electron conduction pathways, compensating for the insufficient conductivity of ZnO. The nanoarray structure enables multiple scattering and reflection of incident light within the array, enhancing photon utilization efficiency. The in-situ grown Zn-HHTP@ZnO heterojunction composite not only possesses abundant active catalytic sites but also exhibits a broad light absorption range. Consequently, the assembled LOBs with Zn-HHTP@ZnO cathode delivers a low charging potential of 3.20 V under illumination and an excellent energy efficiency of 93.4%, which is significantly higher than that of 78% under dark conditions. Therefore, this paper provides a deeper understanding of the mechanism of photoexcited charge carrier in LOBs and will facilitate further exploration of light-involved energy storage systems.

Rights:

• https://creativecommons.org/licenses/by-nc/3.0/
  

Keyword: lithium-oxygen batteries, heterojunction photocatalysts, band engineering

Date published: 2025-12-09

Publisher: Royal Society of Chemistry (RSC)

Journal:

• Chemical Science (ISSN: 20416520) vol. 17 issue. 7 p. 3544-3552

Funding:

• China Postdoctoral Science Foundation 2023M731589
• Natural Science Foundation of Jiangsu Province BK20210616
• Priority Academic Program Development of Jiangsu Higher Education Institutions
• National Natural Science Foundation of China 22309084

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6203

First published URL: https://doi.org/10.1039/d5sc06755c

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Updated at: 2026-03-04 12:30:10 +0900

Published on MDR: 2026-03-04 09:52:48 +0900