biostudies-literatureLi LUniversity Association for Science and Technology111 ProjectNational Natural Science Foundation of ChinaShaanxi "Three Qin Scholars" Innovation TeamHigher Education Discipline Innovation ProjectKey Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry FederationKey Research and Development Program of ShaanxiYoung Scientist Innovation Project of School of Materials Science and Engineering at Shaanxi Normal Universitye2301682https://www.ebi.ac.uk/biostudies/studies/S-EPMC10401084biostudies-literatureUnknown10(22)Photo-assisted Li-O₂ batteries are introduced as a promising strategy for reducing severe overpotential by directly employing photocathodes. Herein, a series of size-controlled single-element boron photocatalysts are prepared by the meticulous liquid phase thinning methods by combining probe and water bath sonication, and their bifunctional photocathodes in the photo-assisted Li-O₂ batteries are systematically investigated. The boron-based Li-O₂ batteries have shown incremental round-trip efficiencies as the sized reduction of boron under illumination. It is noteworthy that the completely amorphous boron nanosheets (B₄ ) photocathode not only delivers an optimizing round-trip efficiency of 190% on the basis of the ultra-high discharge voltage (3.Advanced science (Weinheim, Baden-Wurttemberg, Germany)Size-Controlled Boron-Based Bifunctional Photocathodes for High-Efficiency Photo-Assisted Li-O₂ Batteries.PMC10401084519021932022GY-2002022YSIP-MSE-SNNU0032020-3-551772182Lei ZJia CHe XJiang RLi QLiu ZHLi LMa FSun JfalseSize-Controlled Boron-Based Bifunctional Photocathodes for High-Efficiency Photo-Assisted Li-O₂ Batteries.Photo-assisted Li-O₂ batteries are introduced as a promising strategy for reducing severe overpotential by directly employing photocathodes. Herein, a series of size-controlled single-element boron photocatalysts are prepared by the meticulous liquid phase thinning methods by combining probe and water bath sonication, and their bifunctional photocathodes in the photo-assisted Li-O₂ batteries are systematically investigated. The boron-based Li-O₂ batteries have shown incremental round-trip efficiencies as the sized reduction of boron under illumination. It is noteworthy that the completely amorphous boron nanosheets (B₄ ) photocathode not only delivers an optimizing round-trip efficiency of 190% on the basis of the ultra-high discharge voltage (3.2023-01-01T00:00:00Z2023 Aug2025-04-19T00:56:25.488Z2025-04-07T11:55:49.836ZS-EPMC104010843719501010.1002/advs.202301682