Hierarchical zeolitic imidazolate framework-derived manganese-doped zinc oxide decorated carbon nanofiber electrodes for high performance flexible supercapacitors
- Authors
- Samuel, Edmund; Joshi, Bhavana; Kim, Min-Woo; Kim, Yong-Il; Swihart, Mark T.; Yoon, Sam S.
- Issue Date
- 1-9월-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Mn/ZIF-8; Carbon nanofiber; Supercapacitor; Electrospinning
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.371, pp.657 - 665
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 371
- Start Page
- 657
- End Page
- 665
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/62946
- DOI
- 10.1016/j.cej.2019.04.065
- ISSN
- 1385-8947
- Abstract
- We demonstrate freestanding, flexible, and cost-effective supercapacitor electrodes comprising carbon nanofibers (CNFs) decorated with metal oxide framework (MOF)-derived manganese-doped zinc oxide (Mn@ZnO). Nanoparticles of manganese-doped zeolitic imidazolate framework (ZIF-8) were grown directly on electrospun polyacrylonitrile nanofibers by a simple solution-phase synthesis. Carbonization of these composite fibers produced high surface area dodecahedral Mn@ZnO on core CNFs that provide fast electron-transfer pathways. The synergy between Mn@ZnO (active sites for Faradaic reactions) and the highly electrically conductive carbon nanofiber improves the performance of the supercapacitor electrode. The Mn@ZnO/CNF electrodes exhibit a high specific capacitance of 501 F.g(-1) and retain> 92% of their initial capacitance after 10,000 cycles. The optimized Mn@ZnO/CNF electrodes deliver impressive energy densities of 72.1 W.h.kg(-1) and 33.3 W.h.kg(-1) at power densities of 500 W.kg(-1) and 5000 W.kg(-1), respectively. This electrochemical performance demonstrates that the Mn@ZnO/CNF nanostructured composite is a robust electrode material for long-lifetime high-rate energy storage/delivery devices.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.