Roles of pore structure and type of electrolyte on the capacitive performance of activated carbons used in electrical double-layer capacitors

2014 ◽  
Author(s):  
Seiji Kumagai ◽  
Koji Mukaiyachi ◽  
Masashi Sato ◽  
Nobuhito Kamikuri ◽  
Daisuke Tashima
Keyword(s):  
Pore Structure ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Activated Carbons ◽  
Capacitive Performance ◽  
Electrical Double Layer Capacitors ◽  
Double Layer Capacitors

scholarly journals Mesopore-Rich Activated Carbons for Electrical Double-Layer Capacitors by Optimal Activation Condition

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 608 ◽  
Author(s):  
Lee ◽  
An ◽  
Park ◽  
Kim
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Electrode Materials ◽  
Activated Carbons ◽  
Structural Characteristics ◽  
Textural Properties ◽  
Steam Activation ◽  
Electrical Double Layer Capacitors ◽  
Activation Conditions ◽  
Double Layer Capacitors

In this study, activated polymer-based hard carbon using steam activation (APHS) with mesopore-rich pore structures were prepared for application as electrodes in electrical double-layer capacitors (EDLC). The surface morphologies and structural characteristics of APHS were observed using scanning electron microscopy and X-ray diffraction analysis, respectively. The textural properties were described using Brunauer-Emmett-Teller and Barrett-Joyner-Halenda equations with N2/77 K adsorption isotherms. APHS were prepared under various steam activation conditions to find optimal ones, which were then applied as electrode materials for the EDLC. The observed specific surface areas and total pore volumes of the APHS were in the range 1170–2410 m2/g and 0.48–1.22 cm3/g, respectively. It was observed that pore size distribution mainly depended on the activation time and temperature, and that the volume of pores with size of 1.5–2.5 nm was found to be a key factor determining the electrochemical capacity.

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