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High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels

[Image: see text] Designing the mesopore-dominated activated carbon electrodes has witnessed a significant breakthrough in enhancing the electrolyte breakdown voltage and energy density of supercapacitors. Herein, we designed N-doped mesoporous-dominated hierarchical activated carbon (N-dfAC) from t...

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Autores principales: Gandla, Dayakar, Wu, Xudong, Zhang, Fuming, Wu, Chongrui, Tan, Daniel Q.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7992145/
https://www.ncbi.nlm.nih.gov/pubmed/33778272
http://dx.doi.org/10.1021/acsomega.0c06171
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author Gandla, Dayakar
Wu, Xudong
Zhang, Fuming
Wu, Chongrui
Tan, Daniel Q.
author_facet Gandla, Dayakar
Wu, Xudong
Zhang, Fuming
Wu, Chongrui
Tan, Daniel Q.
author_sort Gandla, Dayakar
collection PubMed
description [Image: see text] Designing the mesopore-dominated activated carbon electrodes has witnessed a significant breakthrough in enhancing the electrolyte breakdown voltage and energy density of supercapacitors. Herein, we designed N-doped mesoporous-dominated hierarchical activated carbon (N-dfAC) from the dragon fruit peel, an abundant biomass precursor, under the synergetic effect of KOH as the activating agent and melamine as the dopant. The electrode with the optimum N-doping content (3.4 at. %) exhibits the highest specific capacitance of 427 F g(–1) at 5 mA cm(–2) and cyclic stability of 123% capacitance retention until 50000 charge–discharge cycles at 500 mA cm(–2) in aqueous 6 M KOH electrolytes. We designed a 4 V symmetric coin cell supercapacitor cell, which exhibits a remarkable specific energy and specific power of 112 W h kg(–1) and 3214 W kg(–1), respectively, in organic electrolytes. The cell also exhibits a significantly higher cycle life (109% capacitance retention) after 5000 GCD cycles at the working voltage of ≥3.5 V than commercial YP-50 AC (∼60% capacitance retention). The larger Debye length of the diffuse ion layer permitted by the mesopores can explain the higher voltage window, and the polar N-doped species in the dfAC enhance capacitance and ion transport. The results endow a new path to design high-capacity and high-working voltage EDLCs from eco-friendly and sustainable biomass materials by properly tuning their pore structures.
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spelling pubmed-79921452021-03-26 High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels Gandla, Dayakar Wu, Xudong Zhang, Fuming Wu, Chongrui Tan, Daniel Q. ACS Omega [Image: see text] Designing the mesopore-dominated activated carbon electrodes has witnessed a significant breakthrough in enhancing the electrolyte breakdown voltage and energy density of supercapacitors. Herein, we designed N-doped mesoporous-dominated hierarchical activated carbon (N-dfAC) from the dragon fruit peel, an abundant biomass precursor, under the synergetic effect of KOH as the activating agent and melamine as the dopant. The electrode with the optimum N-doping content (3.4 at. %) exhibits the highest specific capacitance of 427 F g(–1) at 5 mA cm(–2) and cyclic stability of 123% capacitance retention until 50000 charge–discharge cycles at 500 mA cm(–2) in aqueous 6 M KOH electrolytes. We designed a 4 V symmetric coin cell supercapacitor cell, which exhibits a remarkable specific energy and specific power of 112 W h kg(–1) and 3214 W kg(–1), respectively, in organic electrolytes. The cell also exhibits a significantly higher cycle life (109% capacitance retention) after 5000 GCD cycles at the working voltage of ≥3.5 V than commercial YP-50 AC (∼60% capacitance retention). The larger Debye length of the diffuse ion layer permitted by the mesopores can explain the higher voltage window, and the polar N-doped species in the dfAC enhance capacitance and ion transport. The results endow a new path to design high-capacity and high-working voltage EDLCs from eco-friendly and sustainable biomass materials by properly tuning their pore structures. American Chemical Society 2021-03-09 /pmc/articles/PMC7992145/ /pubmed/33778272 http://dx.doi.org/10.1021/acsomega.0c06171 Text en © 2021 The Authors. Published by American Chemical Society 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 Gandla, Dayakar
Wu, Xudong
Zhang, Fuming
Wu, Chongrui
Tan, Daniel Q.
High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
title High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
title_full High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
title_fullStr High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
title_full_unstemmed High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
title_short High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
title_sort high-performance and high-voltage supercapacitors based on n-doped mesoporous activated carbon derived from dragon fruit peels
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7992145/
https://www.ncbi.nlm.nih.gov/pubmed/33778272
http://dx.doi.org/10.1021/acsomega.0c06171
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