| Residential College | false |
| Status | 已發表Published |
| Breaking the Passivation Effect for MnO2 Catalysts in Li‐S Batteries by Anion‐Cation Doping | |
Jiang, Qingbin1 ; Xu, Huifang1; Hui, Kwan San2 ; Ye, Zhengqing1; Zha, Chenyang1; Lin, Zhan3; Zheng, Mengting4; Lu, Jun4; Hui, Kwun Nam1
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| 2024-07 | |
| Source Publication | Angewandte Chemie International Edition
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| Pages | e202408474 |
| Abstract | Transition metal oxides (TMOs) are recognized as high-efficiency electrocatalyst systems for restraining the shuttle effect in lithium-sulfur (Li-S) batteries, owing to their robust adsorption capabilities for polysulfides. However, the sluggish catalytic conversion of Li2S redox and severe passivation effect of TMOs exacerbate polysulfide shuttling and reduce the cyclability of Li-S batteries, which significantly hinders the development of TMOs electrocatalysts. Here, through the anion-cation doping approach, dual incorporation of phosphorus and molybdenum into MnO2 (P,Mo-MnO2) was engineered, demonstrating effective mitigation of the passivation effect and allowing for the simultaneous immobilization of polysulfides and rapid redox kinetics of Li2S. Both experimental and theoretical investigations reveal the pivotal role of dopants in fine-tuning the d-band center and optimizing the electronic structure of MnO2. Furthermore, this well-designed configuration processes catalytic selectivity. Specifically, P-doping expedites rapid Li2S nucleation kinetics by minimizing reaction-free energy, while Mo-doping facilitates robust Li2S dissolution kinetics by mitigating decomposition barriers. This dual-doping approach equips P,Mo-MnO2 with robust bi-directional catalytic activity, effectively overcoming passivation effect and suppressing the notorious shuttle effect. Consequently, Li-S batteries incorporating P,Mo-MnO2-based separators demonstrate favorable performance than pristine TMOs. This design offers rational viewpoint for the development of catalytic materials with superior bi-directional sulfur electrocatalytic in Li-S batteries. |
| Document Type | Journal article |
| Collection | INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING |
| Corresponding Author | Hui, Kwan San; Lu, Jun; Hui, Kwun Nam |
| Affiliation | 1.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau SAR, 999078, China 2.School of Engineering, Faculty of Science, University of East Anglia, Norwich, UK 3.School of Chemical Engineering and Light Industry Guangdong University of Technology School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China 4.College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, Zhejiang Province, China |
| First Author Affilication | INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING |
| Corresponding Author Affilication | INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING |
| Recommended Citation GB/T 7714 | Jiang, Qingbin,Xu, Huifang,Hui, Kwan San,et al. Breaking the Passivation Effect for MnO2 Catalysts in Li‐S Batteries by Anion‐Cation Doping[J]. Angewandte Chemie International Edition, 2024, e202408474. |
| APA | Jiang, Qingbin., Xu, Huifang., Hui, Kwan San., Ye, Zhengqing., Zha, Chenyang., Lin, Zhan., Zheng, Mengting., Lu, Jun., & Hui, Kwun Nam (2024). Breaking the Passivation Effect for MnO2 Catalysts in Li‐S Batteries by Anion‐Cation Doping. Angewandte Chemie International Edition, e202408474. |
| MLA | Jiang, Qingbin,et al."Breaking the Passivation Effect for MnO2 Catalysts in Li‐S Batteries by Anion‐Cation Doping".Angewandte Chemie International Edition (2024):e202408474. |
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