Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries
Rechargeable lithium-oxygen (Li-O2) batteries are being considered as the next-generation energy storage systems due to their higher theoretical energy density. However, the practical application of Li-O2 batteries is hindered by slow kinetics and the formation of side products during the oxygen red...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier Ltd
2025
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| Online Access: | http://umpir.ump.edu.my/id/eprint/44887/ http://umpir.ump.edu.my/id/eprint/44887/1/Cobalt%20nanoclusters%20deposit%20on%20nitrogen-doped%20graphene.pdf |
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| author | Palani, Raja Wu, Yi–Shiuan Wu, She–Huang Chang, Jeng-Kuei Jose, Rajan Yang, Chun-Chen |
| author_facet | Palani, Raja Wu, Yi–Shiuan Wu, She–Huang Chang, Jeng-Kuei Jose, Rajan Yang, Chun-Chen |
| author_sort | Palani, Raja |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Rechargeable lithium-oxygen (Li-O2) batteries are being considered as the next-generation energy storage systems due to their higher theoretical energy density. However, the practical application of Li-O2 batteries is hindered by slow kinetics and the formation of side products during the oxygen reduction and evolution reactions on the cathode. These reactions lead to high overpotentials during charging and discharging. To address these challenges, we propose a simple ultrasonic method for synthesizing cobalt nanoclusters embedded in nitrogen-doped graphene nanosheets (GrZnCo) derived from metal-organic frameworks (MOFs). The resulting material, due to the retention of metallic cobalt structure, exhibits better electronic conductivity. Additionally, the GrZnCo catalyst shows vigorous catalytic activity, which can improve reaction kinetics and suppress side reactions, thus lowering the charging overpotential. We have investigated the impact of different catalyst compositions (GrZnCox; x = 1, 3, 5) by varying the amounts of cobalt and zinc. The optimum catalyst, GrZnCo3, |
| first_indexed | 2025-11-15T03:57:03Z |
| format | Article |
| id | ump-44887 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T03:57:03Z |
| publishDate | 2025 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-448872025-06-19T07:57:21Z http://umpir.ump.edu.my/id/eprint/44887/ Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries Palani, Raja Wu, Yi–Shiuan Wu, She–Huang Chang, Jeng-Kuei Jose, Rajan Yang, Chun-Chen TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology Rechargeable lithium-oxygen (Li-O2) batteries are being considered as the next-generation energy storage systems due to their higher theoretical energy density. However, the practical application of Li-O2 batteries is hindered by slow kinetics and the formation of side products during the oxygen reduction and evolution reactions on the cathode. These reactions lead to high overpotentials during charging and discharging. To address these challenges, we propose a simple ultrasonic method for synthesizing cobalt nanoclusters embedded in nitrogen-doped graphene nanosheets (GrZnCo) derived from metal-organic frameworks (MOFs). The resulting material, due to the retention of metallic cobalt structure, exhibits better electronic conductivity. Additionally, the GrZnCo catalyst shows vigorous catalytic activity, which can improve reaction kinetics and suppress side reactions, thus lowering the charging overpotential. We have investigated the impact of different catalyst compositions (GrZnCox; x = 1, 3, 5) by varying the amounts of cobalt and zinc. The optimum catalyst, GrZnCo3, Elsevier Ltd 2025 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/44887/1/Cobalt%20nanoclusters%20deposit%20on%20nitrogen-doped%20graphene.pdf Palani, Raja and Wu, Yi–Shiuan and Wu, She–Huang and Chang, Jeng-Kuei and Jose, Rajan and Yang, Chun-Chen (2025) Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries. Journal of Colloid and Interface Science, 680 (Part A). pp. 845-858. ISSN 0021-9797. (Published) https://doi.org/10.1016/j.jcis.2024.11.066 https://doi.org/10.1016/j.jcis.2024.11.066 |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology Palani, Raja Wu, Yi–Shiuan Wu, She–Huang Chang, Jeng-Kuei Jose, Rajan Yang, Chun-Chen Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| title | Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| title_full | Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| title_fullStr | Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| title_full_unstemmed | Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| title_short | Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| title_sort | cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries |
| topic | TK Electrical engineering. Electronics Nuclear engineering TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/44887/ http://umpir.ump.edu.my/id/eprint/44887/ http://umpir.ump.edu.my/id/eprint/44887/ http://umpir.ump.edu.my/id/eprint/44887/1/Cobalt%20nanoclusters%20deposit%20on%20nitrogen-doped%20graphene.pdf |