An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage

A new asymmetric capacitor concept is proposed providing high energy storage capacity for only one charging direction. Size‐selective microporous carbons (w<0.9 nm) with narrow pore size distribution are demonstrated to exclusively electrosorb small anions (BF(4) (−)) but size‐exclude larger cati...

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Autores principales: Zhang, En, Fulik, Natalia, Hao, Guang‐Ping, Zhang, Han‐Yue, Kaneko, Katsumi, Borchardt, Lars, Brunner, Eike, Kaskel, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6772186/
https://www.ncbi.nlm.nih.gov/pubmed/31283103
http://dx.doi.org/10.1002/anie.201904888
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author Zhang, En
Fulik, Natalia
Hao, Guang‐Ping
Zhang, Han‐Yue
Kaneko, Katsumi
Borchardt, Lars
Brunner, Eike
Kaskel, Stefan
author_facet Zhang, En
Fulik, Natalia
Hao, Guang‐Ping
Zhang, Han‐Yue
Kaneko, Katsumi
Borchardt, Lars
Brunner, Eike
Kaskel, Stefan
author_sort Zhang, En
collection PubMed
description A new asymmetric capacitor concept is proposed providing high energy storage capacity for only one charging direction. Size‐selective microporous carbons (w<0.9 nm) with narrow pore size distribution are demonstrated to exclusively electrosorb small anions (BF(4) (−)) but size‐exclude larger cations (TBA(+) or TPA(+)), while the counter electrode, an ordered mesoporous carbon (w>2 nm), gives access to both ions. This architecture exclusively charges in one direction with high rectification ratios (RR=12), representing a novel capacitive analogue of semiconductor‐based diodes (“CAPode”). By precise pore size control of microporous carbons (0.6 nm, 0.8 nm and 1.0 nm) combined with an ordered mesoporous counter electrode (CMK‐3, 4.8 nm) electrolyte cation sieving and unidirectional charging is demonstrated by analyzing the device charge‐discharge response and monitoring individual electrodes of the device via in situ NMR spectroscopy.
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spelling pubmed-67721862019-10-07 An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage Zhang, En Fulik, Natalia Hao, Guang‐Ping Zhang, Han‐Yue Kaneko, Katsumi Borchardt, Lars Brunner, Eike Kaskel, Stefan Angew Chem Int Ed Engl Research Articles A new asymmetric capacitor concept is proposed providing high energy storage capacity for only one charging direction. Size‐selective microporous carbons (w<0.9 nm) with narrow pore size distribution are demonstrated to exclusively electrosorb small anions (BF(4) (−)) but size‐exclude larger cations (TBA(+) or TPA(+)), while the counter electrode, an ordered mesoporous carbon (w>2 nm), gives access to both ions. This architecture exclusively charges in one direction with high rectification ratios (RR=12), representing a novel capacitive analogue of semiconductor‐based diodes (“CAPode”). By precise pore size control of microporous carbons (0.6 nm, 0.8 nm and 1.0 nm) combined with an ordered mesoporous counter electrode (CMK‐3, 4.8 nm) electrolyte cation sieving and unidirectional charging is demonstrated by analyzing the device charge‐discharge response and monitoring individual electrodes of the device via in situ NMR spectroscopy. John Wiley and Sons Inc. 2019-08-05 2019-09-09 /pmc/articles/PMC6772186/ /pubmed/31283103 http://dx.doi.org/10.1002/anie.201904888 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Articles
Zhang, En
Fulik, Natalia
Hao, Guang‐Ping
Zhang, Han‐Yue
Kaneko, Katsumi
Borchardt, Lars
Brunner, Eike
Kaskel, Stefan
An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage
title An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage
title_full An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage
title_fullStr An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage
title_full_unstemmed An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage
title_short An Asymmetric Supercapacitor–Diode (CAPode) for Unidirectional Energy Storage
title_sort asymmetric supercapacitor–diode (capode) for unidirectional energy storage
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6772186/
https://www.ncbi.nlm.nih.gov/pubmed/31283103
http://dx.doi.org/10.1002/anie.201904888
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