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Superior rate capability of high mass loading supercapacitors fabricated with carbon recovered from methane cracking

by Baptista, Joana M. , Wijayantha, Upul K. G. , Lobato, Killian , Shaban, Muhammad , Shacklock, Jack , Alkayal, Anas

in Capacitance / Carbon / Carbon black / Carbon nanotubes / Catalytic cracking / Chemical properties / Cracking process / Design and construction / electrochemistry / Electrodes / Electrolytes / Hydrogen / Hydrogen production / Ion currents / Materials / Methane / methane cracking / Methods / Nanotubes / porous nanocarbon-based electrodes / Production processes / rate capability / Supercapacitors / Ultracapacitors

2023

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Superior rate capability of high mass loading supercapacitors fabricated with carbon recovered from methane cracking

by Baptista, Joana M. , Wijayantha, Upul K. G. , Lobato, Killian , Shaban, Muhammad , Shacklock, Jack , Alkayal, Anas

2023

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Superior rate capability of high mass loading supercapacitors fabricated with carbon recovered from methane cracking

by Baptista, Joana M. , Wijayantha, Upul K. G. , Lobato, Killian , Shaban, Muhammad , Shacklock, Jack , Alkayal, Anas

2023

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Journal Article

Superior rate capability of high mass loading supercapacitors fabricated with carbon recovered from methane cracking

Baptista, Joana M.,

Wijayantha, Upul K. G.,

Lobato, Killian,

Shaban, Muhammad,

Shacklock, Jack,

Alkayal, Anas

2023

Overview

High mass loading (ca. 30 mg/cm2) electrodes were prepared with carbon recovered from catalytic methane cracking (MC). As-fabricated supercapacitors displayed 74% of capacitance retention from 6 mA/cm2 to 60 mA/cm2 and a Ragone plot’s slope of −7 Wh/kW (compared to 42% and −31 Wh/kW, respectively, for high mass loading devices fabricated with commercial carbon). The high-rate capability of the MC-recovered carbon is attributed to the presence of carbon black and carbon nanotubes produced during the reaction, which likely increased the electronic and ionic conductivity within the electrode. These results suggest that the by-product of this hydrogen generation route might be a suitable active material for supercapacitors.

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Publisher

MDPI,MDPI AG

Subject

/ Carbon

/ Chemical properties

/ Cracking process