Enrichment of Pyrrolic Nitrogen by Hole Defects in Nitrogen and Sulfur Co-Doped Graphene Hydrogel for Flexible Supercapacitors
- Authors
- Tran, NQ[Ngoc Quang Tran]; Kang, BK[Kang, Bong Kyun]; Woo, MH[Woo, Moo Hyun]; Yoon, DH[Yoon, Dae Ho]
- Issue Date
- 23-Aug-2016
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- doping; hydrogels; graphene; hole defect; supercapacitors
- Citation
- CHEMSUSCHEM, v.9, no.16, pp.2261 - 2268
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMSUSCHEM
- Volume
- 9
- Number
- 16
- Start Page
- 2261
- End Page
- 2268
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/35530
- DOI
- 10.1002/cssc.201600668
- ISSN
- 1864-5631
- Abstract
- The effect of the doping configuration and concentration of nitrogen (N) and sulfur (S) on the electrochemical performance of 3D N and S co-doped hole defect graphene hydrogel (NS-HGH) electrodes is investigated. Surprisingly, by introducing a hole defect on the graphene surface, the difference in the doping concentrations of N and S can be used to effectively modulate the electrochemical behavior of the NS-HGH. The hole defects provide a rapid ion diffusion path. Finally, we showed that the intriguing specific capacitance (536Fg(-1)) of the NS-HGH could enhance the overall performance of the pseudocapacitance and electric double layer capacitance. The rational design of the NS-HGH-based flexible solid state supercapacitor results in not only outstanding electrochemical performance with a maximum energy density of 14.8 Wh kg(-1) and power density of 5.2KWkg(-1) but also in extraordinary mechanical flexibility and excellent cycle stability.
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Collections - Engineering > School of Advanced Materials Science and Engineering > 1. Journal Articles
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