Homogeneous Elongation of N-Doped CNTs over Nano-Fibrillated Hollow-Carbon-Nanofiber: Mass and Charge Balance in Asymmetric Supercapacitors Is No Longer Problematicopen access
- Authors
- Kim, Taewoo; Subedi, Subhangi; Dahal, Bipeen; Chhetri, Kisan; Mukhiya, Tanka; Muthurasu, Alagan; Gautam, Jagadis; Lohani, Prakash Chandra; Acharya, Debendra; Pathak, Ishwor; Chae, Su-Hyeong; Ko, Tae Hoon; Kim, Hak Yong
- Issue Date
- Jul-2022
- Publisher
- WILEY
- Keywords
- double layer anodes; electrospinning; mass balancing; metal-organic frameworks; nano-fibrillated hollow carbon nanofibers (CNFs); N-doped carbon nanotubes (CNTs); supercapacitors
- Citation
- ADVANCED SCIENCE, v.9, no.20
- Journal Title
- ADVANCED SCIENCE
- Volume
- 9
- Number
- 20
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/28378
- DOI
- 10.1002/advs.202200650
- ISSN
- 2198-3844
2198-3844
- Abstract
- The hurdle of fabricating asymmetric supercapacitor (ASC) devices using a faradic cathode and a double layer anode is challenging due to the required large amount of active mass of anodic material compared to that of the cathodic material during mass balancing due to the large difference in capacitance values of the two electrodes. Here, the problem is addressed by engineering a negative electrode that furnishes an ultrahigh capacitance. An in situ developed metal-organic framework (MOF)-based thermal treatment is adopted to grow highly porous N-doped carbon nanotubes (CNTs) containing submerged Co nanoparticles over nano-fibrillated electrospun hollow carbon nanofibers (HCNFs). The optimized CNT@HCNF-1.5 furnishes an ultrahigh capacitance approaching 712 F g(-1) with excellent rate capability. The capacitance reported from this work is the highest for any carbonaceous material reported to date. The CNT@HCNF-1.5 is further used to fabricate symmetric supercapacitors (SSCs), as well as ASC devices. Remarkably, both the SSC and ASC devices furnish incredible performances in all aspects of SCs, such as a high energy density, long cycle life, and high rate capability, displaying decent practical applicability. The energy density of the SSC device reaches as high as 20.13 W h kg(-1), whereas that of ASC approaches 87.5 W h kg(-1).
- Files in This Item
-
- Appears in
Collections - ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.