Cobalt nanoclusters deposit on nitrogen-doped graphene sheets as bifunctional electrocatalysts for high performance lithium – oxygen batteries

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)

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DOI/Official URL: https://doi.org/10.1016/j.jcis.2024.11.066

Abstract

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,

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Energy storage materials; Metal organic framework (MOF); Metal – graphene composites; Nanocrystal catalysts; Oxygen redox reactions
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology
Faculty/Division:	Faculty of Industrial Sciences And Technology
Depositing User:	Mrs. Nurul Hamira Abd Razak
Date Deposited:	19 Jun 2025 07:57
Last Modified:	19 Jun 2025 07:57
URI:	http://umpir.ump.edu.my/id/eprint/44887
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