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
SN - 1385-8947
VL - 427.2021
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
IS - 1 January
M1 - 131730
ER -
