Publication: Waste coffee grounds derived nanoporous carbon incorporated with carbon nanotubes composites for electrochemical double-layer capacitors in organic electrolyte
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Issued Date
2021
Resource Type
Language
eng
File Type
application/pdf
ISSN
2352152X
Other identifier(s)
2-s2.0-85118563244
Rights Holder(s)
Scopus
Bibliographic Citation
Journal of Energy Storage. Vol 43, No. (2021)
Suggested Citation
Poochai C., Srikhaow A., Lohitkarn J., Kongthong T., Tuantranont S., Tuantranont S., Primpray V., Maeboonruan N., Wisitsoraat A., Sriprachuabwong C. Waste coffee grounds derived nanoporous carbon incorporated with carbon nanotubes composites for electrochemical double-layer capacitors in organic electrolyte. Journal of Energy Storage. Vol 43, No. (2021). doi:10.1016/j.est.2021.103169 Retrieved from: https://hdl.handle.net/20.500.14740/8142
Abstract
Carbon nanotube (CNT)-incorporated nanoporous carbon (NPC) derived from the waste coffee ground composite was proposed as a potential electrode material for electrochemical double layer supercapacitors with an organic electrolyte. CNT-incorporated NPC pastes with different CNT contents were fabricated via a simple ball-milling method and then coated on a carbon nanofiber paper using a doctor blade technique. According to structural characterization data, the 3%CNT/NPC material offered a high specific surface area of 1157.8 m2 g−1 with a small average pore diameter of 1.42 nm owing to the intercalation of CNT structures between the NPC flakes. From electrochemical measurements, a coin cell using 3%CNT/NPC in 1 M TEABF4/ACN exhibited a high specific capacitance of 132 Fg−1 and a high specific energy of 37.7 Wh kg−1 at 0.5 Ag−1, which are considerably higher than those using NPC (74 Fg−1 and 20.1 Wh kg−1) and CNT (48 Fg−1 and 14.7 Wh kg−1). In addition, the composite possessed higher rate capability, better cycling stability, and lower self-discharge rate compared with NPC and CNT electrodes. Hence, the 3%CNT/NPC composite was promising as an active material for producing advanced supercapacitors. © 2021 Elsevier Ltd
Subject(s)
Ball milling
Carbon nanofibers
Electric discharges
Electrochemical electrodes
Electrolytes
Organic carbon
Supercapacitor
Carbon nanotubes composites
Coffee grounds
Double-layer supercapacitor
Electrochemical double-layer capacitors
Electrochemicals
Electrode material
Nanoporous carbons
Organic electrolyte
Self-discharges
Waste coffees
Carbon nanotubes
Carbon nanofibers
Electric discharges
Electrochemical electrodes
Electrolytes
Organic carbon
Supercapacitor
Carbon nanotubes composites
Coffee grounds
Double-layer supercapacitor
Electrochemical double-layer capacitors
Electrochemicals
Electrode material
Nanoporous carbons
Organic electrolyte
Self-discharges
Waste coffees
Carbon nanotubes