Preparation of porous carbons by hydrothermal carbonization and KOH activation of lignite and their performance for electric double layer capacitor

2017 ◽  
Vol 252 ◽  
pp. 397-407 ◽  
Author(s):  
Yan Wu ◽  
Jing-Pei Cao ◽  
Xiao-Yan Zhao ◽  
Zhi-Qiang Hao ◽  
Qi-Qi Zhuang ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Hydrothermal Carbonization ◽  
Koh Activation ◽  
Electric Double Layer Capacitor ◽  
Porous Carbons ◽  
Double Layer Capacitor

scholarly journals Assessment of Biochar Produced by Flame-Curtain Pyrolysis as a Precursor for the Development of an Efficient Electric Double-Layer Capacitor

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7671
Author(s):  
Toshiki Tsubota ◽  
Shion Tsuchiya ◽  
Tatsuya Kusumoto ◽  
Dimitrios Kalderis
Keyword(s):  
Surface Area ◽  
Double Layer ◽  
Adsorption Isotherms ◽  
Electric Double Layer ◽  
Koh Activation ◽  
Activation Process ◽  
Type I ◽  
Electric Double Layer Capacitor ◽  
Pine Tree ◽  
Double Layer Capacitor

Pine tree biochar produced by flame-curtain pyrolysis, an inexpensive and simple pyrolysis methodology, was used as the starting material for KOH-activated carbon. Flame-curtain pyrolysis is a simple, low-technology methodology that can be performed by non-specialized personnel. The elemental analysis of the biochars highlighted the high reproducibility of the process. The N2 adsorption isotherms indicated that KOH activation was effective for the preparation of high-surface-area activated carbons from the biochar. The BET specific surface area increased with the quantity of KOH added in the activation process, achieving a maximum value of 3014 m2 g−1 at 85.7 wt.% of KOH addition. The adsorption isotherms of all samples were IUPAC type I, establishing their microporous nature. Results from the Mikhail–Brunauer (MP) method and αs plot indicated that the pore size distribution became wider and the pore volume increased as the KOH content increased. The measured capacitance values followed the same dependence on KOH content. The maximum capacitance value at 1 mV s−1 was determined as 200.6 F g−1 for the sample prepared at 75 wt.% of KOH addition. Therefore, pine tree biochar prepared by simple pyrolysis equipment is a suitable precursor for the development of an electric double-layer capacitor.

Electrode for Electric Double Layer Capacitor Made of Carbonized and Activated Cotton Cloth

2014 ◽  
Vol 134 (5) ◽  
pp. 360-361
Author(s):  
Masumi Fukuma ◽  
Takayuki Uchida ◽  
Yukito Fukushima ◽  
Jinichi Ogawa ◽  
Katsumi Yoshino
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Cotton Cloth ◽  
Electric Double Layer Capacitor ◽  
Double Layer Capacitor
Sign in / Sign up

Export Citation Format

Share Document