Light-Induced Alternating Catalysis on Single-Atom Ruthenium Embedded in Covalent Organic Frameworks for High-Performance Photo-Assisted Li–O2 Batteries
Angewandte Chemie - International Edition, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/anie.8705276
- Dergi Adı: Angewandte Chemie - International Edition
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, L'Année philologique, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, EMBASE, MEDLINE, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Earth, Atmospheric, & Aquatic Science Collection (ProQuest), Health Research Premium Collection (ProQuest), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: covalent organic frameworks, light-induced, photo-assisted Li–O2 batteries, ruthenium, single atom catalyst
- Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet
Özet
The development of high-efficiency cathode catalysts is crucial for advancing photo-assisted non-aqueous lithium–oxygen (Li–O2) batteries, which leverage solar energy to reduce the high overpotential for driving oxygen reduction and evolution processes. However, the state-of-the-art photo-cathode catalysts often lack multi-step conversion pathways that regulate interactions between complex active sites and reactive oxygen-related intermediates within Li–O2 battery systems. Herein, we report a new light-induced alternating catalytic mechanism based on a single-atom Ru-embedded covalent organic framework assembled from a triazine-core C3-symmetric node and π-extended perylene-diimide linkers (T-PDI), generating an ordered conjugated Ru/T-PDI network that functions as a high-performance photo cathode of the Li–O2 battery. Unlike conventional photo-assisted catalysts that operate through the single-site activity, the Ru/T-PDI electrode enables dynamic migration and efficient conversion of reactive oxygen species between catalytic sites across multiple selective sites. This mechanism orchestrates the multi-step transformation process within Li–O2 batteries, significantly enhancing catalytic efficiency of active sites and facilitating both the formation and decomposition of Li2O2 products. As a result, the photo-assisted Li–O2 battery employing the Ru/T-PDI cathode achieves a quite low overpotential, outstanding cycling stability and excellent rate performance. This work provides crucial insights for reaction mechanism studies and catalyst design for next-generation light-driven metal–oxygen batteries.