Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries
Cycling Li-O2 batteries (LOBs) via LiOH is promising for developing practically viable batteries, while promoting the formation and decomposition of LiOH remains a challenge. Cobalt single atom catalysts (Co-SACs) have been exploited to mediate the direct 4e− oxygen reduction reaction for generating...
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Elsevier
2025-03-01
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| Series: | Materials Today Catalysis |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949754X25000031 |
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| author | Kang Huang Zhixiu Lu Shilong Dai Chunyu Cui Nam Dong Kim Huilong Fei |
| author_facet | Kang Huang Zhixiu Lu Shilong Dai Chunyu Cui Nam Dong Kim Huilong Fei |
| author_sort | Kang Huang |
| collection | DOAJ |
| description | Cycling Li-O2 batteries (LOBs) via LiOH is promising for developing practically viable batteries, while promoting the formation and decomposition of LiOH remains a challenge. Cobalt single atom catalysts (Co-SACs) have been exploited to mediate the direct 4e− oxygen reduction reaction for generating LiOH discharge products, but their inferior oxygen evolution activity renders the battery low energy efficiency and poor cycling life. Herein, we for the first time introduce LiBr redox mediator (RM) into the Co-SACs-catalyzed LOB system to facilitate the decomposition of LiOH. In the discharge process, the catalysis of Co-SAC is unaffected with the presence of LiBr. During charging, Br3− is identified as the oxidizer to decompose LiOH at an appropriate potential (3.6 V). Significantly, the soluble Br− is recyclable in the system as the BrO− intermediate could shuttle to the anode and react with Li metal to regenerate Br− so that the generation of LiBrO3 deposit is circumvented. Consequently, the fabricated LOB demonstrates fewer side reactions, stable energy efficiency (drop rate of 0.10 % per cycle) and long cycle life (300 cycles at 1000 mA/g) under the ambient atmosphere. |
| format | Article |
| id | doaj-art-9a523b1361da4669bcc677f6727e9b73 |
| institution | Kabale University |
| issn | 2949-754X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials Today Catalysis |
| spelling | doaj-art-9a523b1361da4669bcc677f6727e9b732025-02-12T05:33:12ZengElsevierMaterials Today Catalysis2949-754X2025-03-018100090Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteriesKang Huang0Zhixiu Lu1Shilong Dai2Chunyu Cui3Nam Dong Kim4Huilong Fei5Advanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, ChinaAdvanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, ChinaAdvanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, ChinaAdvanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, ChinaFunctional Composite Materials Research Center, Korea Institute of Science and Technology (KIST), Jeollabuk-do 55324, Republic of KoreaAdvanced Catalytic Engineering Research Center of the Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China; Corresponding author.Cycling Li-O2 batteries (LOBs) via LiOH is promising for developing practically viable batteries, while promoting the formation and decomposition of LiOH remains a challenge. Cobalt single atom catalysts (Co-SACs) have been exploited to mediate the direct 4e− oxygen reduction reaction for generating LiOH discharge products, but their inferior oxygen evolution activity renders the battery low energy efficiency and poor cycling life. Herein, we for the first time introduce LiBr redox mediator (RM) into the Co-SACs-catalyzed LOB system to facilitate the decomposition of LiOH. In the discharge process, the catalysis of Co-SAC is unaffected with the presence of LiBr. During charging, Br3− is identified as the oxidizer to decompose LiOH at an appropriate potential (3.6 V). Significantly, the soluble Br− is recyclable in the system as the BrO− intermediate could shuttle to the anode and react with Li metal to regenerate Br− so that the generation of LiBrO3 deposit is circumvented. Consequently, the fabricated LOB demonstrates fewer side reactions, stable energy efficiency (drop rate of 0.10 % per cycle) and long cycle life (300 cycles at 1000 mA/g) under the ambient atmosphere.http://www.sciencedirect.com/science/article/pii/S2949754X25000031Single atom catalystLi-O2 batteriesAir-breathingLiOH chemistryLiBr |
| spellingShingle | Kang Huang Zhixiu Lu Shilong Dai Chunyu Cui Nam Dong Kim Huilong Fei Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries Materials Today Catalysis Single atom catalyst Li-O2 batteries Air-breathing LiOH chemistry LiBr |
| title | Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries |
| title_full | Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries |
| title_fullStr | Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries |
| title_full_unstemmed | Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries |
| title_short | Coupling cobalt single-atom catalyst with recyclable LiBr redox mediator enables stable LiOH-based Li-O2 batteries |
| title_sort | coupling cobalt single atom catalyst with recyclable libr redox mediator enables stable lioh based li o2 batteries |
| topic | Single atom catalyst Li-O2 batteries Air-breathing LiOH chemistry LiBr |
| url | http://www.sciencedirect.com/science/article/pii/S2949754X25000031 |
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