TY - JOUR

T1 - Nanoporous polymer-derived activated carbon for hydrogen adsorption and electrochemical energy storage

AU - Kostoglou, Nikolaos

AU - Koczwara, Christian

AU - Stock, Sebastian

AU - Tampaxis, Christos

AU - Charalambopoulou, Georgia

AU - Steriotis, Theodore

AU - Paris, Oskar

AU - Rebholz, Claus

AU - Mitterer, Christian

N1 - Publisher Copyright: © 2021 The Author(s)

PY - 2022/1/1

Y1 - 2022/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85113155946&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2021.131730

DO - 10.1016/j.cej.2021.131730

M3 - Article

VL - 427.2021

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

IS - 1 January

M1 - 131730

ER -