Synthesis of three-dimensional Co/CoO/N-doped carbon nanotube composite for zinc air battery
- Authors
- Lee, Jun Yeob; Park, Gi Dae; Kim, Jung Hyun; Hong, Jeong Hoo; Kang, Yun Chan
- Issue Date
- 9월-2021
- Publisher
- WILEY
- Keywords
- N& #8208; Zn& #8208; air batteries; doped CNT; electrocatalyst; nanostructured materials; porous structure
- Citation
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.45, no.11, pp.16091 - 16101
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Volume
- 45
- Number
- 11
- Start Page
- 16091
- End Page
- 16101
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/136432
- DOI
- 10.1002/er.6839
- ISSN
- 0363-907X
- Abstract
- Development of bifunctional electrocatalysts for oxygen electrocatalytic reactions is significant in improving the performance of Zn-air batteries. Among all candidates, transition metal compounds and carbon nanotube composites have attracted considerable attention owing to their great catalytic activities. Herein, three-dimensional (3D) macroporous carbon nanotube (CNT) microspheres interconnected with thorn-like N-doped CNT surrounding Co/CoO (m-C@Co/CoO-bC) are synthesized via spray pyrolysis, followed by N-doped CNT growth and oxidation. Hierarchical nanohybrids with porous N-doped CNT-network and Co/CoO catalysts are rationally designed and applied as an efficient oxygen electrocatalyst. The porous carbon backbone exhibits high electrical conductivity with robust corrosion resistance. In addition, interconnected N-doped CNTs wrapping Co/CoO nanocatalysts exhibit enhanced catalytic properties as compared to commercial Pt/C and RuO2 in alkaline media. m-C@Co/CoO-bC exhibits a robust cycle stability, higher power density, and lower polarization potential difference when applied as the oxygen electrode in a rechargeable Zn-air battery, in comparison to commercial Pt/C-RuO2 mixed powders.
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