Nanoporous polymer-derived activated carbon for hydrogen adsorption and electrochemical energy storage

Nikolaos Kostoglou; Christian Koczwara; Sebastian Stock; Christos Tampaxis; Georgia Charalambopoulou; Theodore Steriotis; Oskar Paris; Claus Rebholz; Christian Mitterer

doi:10.1016/j.cej.2021.131730

Nanoporous polymer-derived activated carbon for hydrogen adsorption and electrochemical energy storage

Nikolaos Kostoglou, Christian Koczwara, Sebastian Stock, Christos Tampaxis, Georgia Charalambopoulou, Theodore Steriotis, Oskar Paris, Claus Rebholz, Christian Mitterer

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Begutachtung

2 Zitate (Scopus)

Abstract

The development and in-depth characterization of multifunctional materials with versatile use in energy and environmental applications has been a topic of on-going investigations. In this work, a nanoporous polymer-/polyaniline-derived activated carbon (PDAC), with large surface area (~2200 m ²/g) and large pore volume (~1 cm ³/g), was thoroughly studied towards its applicability for H ₂ storage and supercapacitor energy storage. The PDAC demonstrated a superior H ₂ adsorption performance under cryogenic conditions, reaching a high and fully reversible excess gravimetric H ₂ uptake of ~5.5 wt% at 77 K and ~60 bar, along with a ~8.3 kJ/mol heat of adsorption at zero coverage. Furthermore, thin PDAC electrodes with an aqueous CsCl electrolyte were combined in a supercapacitor cell that exhibited a gravimetric capacitance of ~130 F/g for a 0.5 mV/s scanning rate along with a 99% coulombic efficiency and a 100% capacitance retention after 2500 charge/discharge cycles. The PDAC material showed substantially improved H ₂ and electrochemical energy storage performance compared to a well-established commercial activated carbon, which is attributed to the overall smaller pore sizes of the PDAC structure.

Originalsprache	Englisch
Aufsatznummer	131730
Seitenumfang	10
Fachzeitschrift	Chemical Engineering Journal
Jahrgang	427.2021
Ausgabenummer	1 January
Frühes Online-Datum	8 Aug. 2021
DOIs	https://doi.org/10.1016/j.cej.2021.131730
Publikationsstatus	Veröffentlicht - 1 Jan. 2022

Bibliographische Notiz

Funding Information:
The authors are grateful to Prof. Zhenan Bao, Dr. John To and Dr. Shucheng Chen from Stanford University (USA) for providing the PDAC material and the respective SEM images (see Fig. 1). The authors are also thankful to Dr. Gerhard Popovski from the Montanuniversit?t Leoben for helpful discussions on the SAXS analysis.

Publisher Copyright:
© 2021 The Author(s)

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abstract = "The development and in-depth characterization of multifunctional materials with versatile use in energy and environmental applications has been a topic of on-going investigations. In this work, a nanoporous polymer-/polyaniline-derived activated carbon (PDAC), with large surface area (~2200 m 2/g) and large pore volume (~1 cm 3/g), was thoroughly studied towards its applicability for H 2 storage and supercapacitor energy storage. The PDAC demonstrated a superior H 2 adsorption performance under cryogenic conditions, reaching a high and fully reversible excess gravimetric H 2 uptake of ~5.5 wt% at 77 K and ~60 bar, along with a ~8.3 kJ/mol heat of adsorption at zero coverage. Furthermore, thin PDAC electrodes with an aqueous CsCl electrolyte were combined in a supercapacitor cell that exhibited a gravimetric capacitance of ~130 F/g for a 0.5 mV/s scanning rate along with a 99% coulombic efficiency and a 100% capacitance retention after 2500 charge/discharge cycles. The PDAC material showed substantially improved H 2 and electrochemical energy storage performance compared to a well-established commercial activated carbon, which is attributed to the overall smaller pore sizes of the PDAC structure. ",

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AU - Steriotis, Theodore

AU - Paris, Oskar

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AU - Mitterer, Christian

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