Cargando…
Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes
N, S-doped ultramicroporous carbons (NSUC-x) with a high nitrogen/sulfur content and a narrow pore-size distribution of around 0.55 nm were firstly prepared using L-cysteine as a nitrogen and sulfur source. The phase, graphitization degree, morphology, specific surface area, pore structure and surfa...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9228602/ https://www.ncbi.nlm.nih.gov/pubmed/35744519 http://dx.doi.org/10.3390/mi13060905 |
_version_ | 1784734521095094272 |
---|---|
author | Lu, Wenjing Hao, Lina Wang, Yawei |
author_facet | Lu, Wenjing Hao, Lina Wang, Yawei |
author_sort | Lu, Wenjing |
collection | PubMed |
description | N, S-doped ultramicroporous carbons (NSUC-x) with a high nitrogen/sulfur content and a narrow pore-size distribution of around 0.55 nm were firstly prepared using L-cysteine as a nitrogen and sulfur source. The phase, graphitization degree, morphology, specific surface area, pore structure and surface condition of NSUC-x are investigated to analyze the key role in electrochemical performance. Such an ultramicroporous structure and N, S doping not merely provide a high-specific surface area and a suitable pore size, but also induce a good wettability for the fast transport and adsorption of electrolyte ions. Due to the above strategies, the typical NSUC-0.4 exhibits a high gravimetric capacitance of 339 F g(−1) at 0.5 A g(−1) as well as a capacity retention of 91.6% after 10,000 cycles in a three-electrode system using a 6 M KOH electrolyte. More attractively, a NSUC-0.4-assembled symmetrical supercapacitor delivers an energy output of 7.4 Wh kg(−1) at 100 W kg(−1) in 6 M KOH as well as a capacity retention of 92.4% after 10,000 cycles, indicating its practical application prospect. Our findings open up new prospects for the design and electrochemical application of N, S-doped ultramicroporous carbons. |
format | Online Article Text |
id | pubmed-9228602 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-92286022022-06-25 Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes Lu, Wenjing Hao, Lina Wang, Yawei Micromachines (Basel) Article N, S-doped ultramicroporous carbons (NSUC-x) with a high nitrogen/sulfur content and a narrow pore-size distribution of around 0.55 nm were firstly prepared using L-cysteine as a nitrogen and sulfur source. The phase, graphitization degree, morphology, specific surface area, pore structure and surface condition of NSUC-x are investigated to analyze the key role in electrochemical performance. Such an ultramicroporous structure and N, S doping not merely provide a high-specific surface area and a suitable pore size, but also induce a good wettability for the fast transport and adsorption of electrolyte ions. Due to the above strategies, the typical NSUC-0.4 exhibits a high gravimetric capacitance of 339 F g(−1) at 0.5 A g(−1) as well as a capacity retention of 91.6% after 10,000 cycles in a three-electrode system using a 6 M KOH electrolyte. More attractively, a NSUC-0.4-assembled symmetrical supercapacitor delivers an energy output of 7.4 Wh kg(−1) at 100 W kg(−1) in 6 M KOH as well as a capacity retention of 92.4% after 10,000 cycles, indicating its practical application prospect. Our findings open up new prospects for the design and electrochemical application of N, S-doped ultramicroporous carbons. MDPI 2022-06-07 /pmc/articles/PMC9228602/ /pubmed/35744519 http://dx.doi.org/10.3390/mi13060905 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lu, Wenjing Hao, Lina Wang, Yawei Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes |
title | Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes |
title_full | Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes |
title_fullStr | Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes |
title_full_unstemmed | Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes |
title_short | Highly active N, S Co-Doped Ultramicroporous Carbon for High-Performance Supercapacitor Electrodes |
title_sort | highly active n, s co-doped ultramicroporous carbon for high-performance supercapacitor electrodes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9228602/ https://www.ncbi.nlm.nih.gov/pubmed/35744519 http://dx.doi.org/10.3390/mi13060905 |
work_keys_str_mv | AT luwenjing highlyactivenscodopedultramicroporouscarbonforhighperformancesupercapacitorelectrodes AT haolina highlyactivenscodopedultramicroporouscarbonforhighperformancesupercapacitorelectrodes AT wangyawei highlyactivenscodopedultramicroporouscarbonforhighperformancesupercapacitorelectrodes |