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Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors

[Image: see text] Hierarchical porous heteroatom-doped carbon composites were developed by carbonization followed by KOH activation process, with natural silkworm cocoon and chemical exfoliated graphene sheets as starting materials. The introduction of graphene sheets offers more hierarchical micro/...

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Autores principales: Zhou, Lin, Hou, Jin-Yang, Chen, Yu-Ning, Li, Shao-Cheng, Zou, Ben-Xue
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9386713/
https://www.ncbi.nlm.nih.gov/pubmed/35990445
http://dx.doi.org/10.1021/acsomega.2c02735
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author Zhou, Lin
Hou, Jin-Yang
Chen, Yu-Ning
Li, Shao-Cheng
Zou, Ben-Xue
author_facet Zhou, Lin
Hou, Jin-Yang
Chen, Yu-Ning
Li, Shao-Cheng
Zou, Ben-Xue
author_sort Zhou, Lin
collection PubMed
description [Image: see text] Hierarchical porous heteroatom-doped carbon composites were developed by carbonization followed by KOH activation process, with natural silkworm cocoon and chemical exfoliated graphene sheets as starting materials. The introduction of graphene sheets offers more hierarchical micro/meso porosities, a low charge-transfer resistance, and a large BET surface area of ∼1281.8 m(2) g(–1), which are responsible for the fast charge/discharge kinetics and the high rate capability compared with those of single silk fibroins-derived carbon materials. The silk fiber provides a high level of heteroatom functionalities (∼2.54% N and ∼21.3% O), which are desirable for high faradaic pseudocapacitance. The as-prepared carbon composite exhibited a high specific capacitance of 290 F g(–1) with good rate capability and cycling stability. The symmetric supercapacitors yielded a high value of energy density of 12.9 W h kg(–1) at a power density of 95 W kg(–1) with a 1.45 V voltage range in 1 M KOH aqueous electrolytes.
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spelling pubmed-93867132022-08-19 Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors Zhou, Lin Hou, Jin-Yang Chen, Yu-Ning Li, Shao-Cheng Zou, Ben-Xue ACS Omega [Image: see text] Hierarchical porous heteroatom-doped carbon composites were developed by carbonization followed by KOH activation process, with natural silkworm cocoon and chemical exfoliated graphene sheets as starting materials. The introduction of graphene sheets offers more hierarchical micro/meso porosities, a low charge-transfer resistance, and a large BET surface area of ∼1281.8 m(2) g(–1), which are responsible for the fast charge/discharge kinetics and the high rate capability compared with those of single silk fibroins-derived carbon materials. The silk fiber provides a high level of heteroatom functionalities (∼2.54% N and ∼21.3% O), which are desirable for high faradaic pseudocapacitance. The as-prepared carbon composite exhibited a high specific capacitance of 290 F g(–1) with good rate capability and cycling stability. The symmetric supercapacitors yielded a high value of energy density of 12.9 W h kg(–1) at a power density of 95 W kg(–1) with a 1.45 V voltage range in 1 M KOH aqueous electrolytes. American Chemical Society 2022-08-03 /pmc/articles/PMC9386713/ /pubmed/35990445 http://dx.doi.org/10.1021/acsomega.2c02735 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Zhou, Lin
Hou, Jin-Yang
Chen, Yu-Ning
Li, Shao-Cheng
Zou, Ben-Xue
Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors
title Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors
title_full Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors
title_fullStr Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors
title_full_unstemmed Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors
title_short Porous Carbon Composite Generated from Silk Fibroins and Graphene for Supercapacitors
title_sort porous carbon composite generated from silk fibroins and graphene for supercapacitors
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9386713/
https://www.ncbi.nlm.nih.gov/pubmed/35990445
http://dx.doi.org/10.1021/acsomega.2c02735
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