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- 저자 : Erman Taer (검색결과 2 건)
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Erman Taer,Mohamad Deraman,Ibrahim Abu Talib,Akrajas Ali Umar,Munetaka Oyama,Rozan Mohamad Yunus 한국물리학회 2010 Current Applied Physics Vol.10 No.4
The physical and electrochemical properties of the activated carbon pellet electrodes have been investigated. Activated carbon pellets were prepared from single step carbonization process of pre-carbonized rubber wood sawdust at a temperature of 800 ℃ that followed with a CO2 activation process at temperature in the range of 700–1000 ℃. The BET characterization on the sample found that the surface area of the carbon pellet increased with the increasing of the activation temperature. The optimum value was as high as 683.63 ㎡ g-1. The electrical conductivity was also found to increase linearly with the increasing of the activation temperature, namely from 0.0075 S cm-1 to 0.0687 S cm-1 for the activation temperature in the range of 700–1000 ℃. The cyclic voltammetry characterization of the samples in aqueous solution of 1 M H2SO4 also found that the specific capacitance increased with the increasing of the activation temperature. Typical optimum value was shown by the sample activated at 900 ℃ with the specific capacitance was as high as 33.74 Fg-1 (scan rate 1 mV s-1). The retained ratio was as high as 32.72%. The activated carbon pellet prepared from the rubber wood sawdust may found used in supercapacitor applications.
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Taer Erman,Febriyanti Friska,Mustika Widya Sinta,Taslim Rika,Agustino Agustino,Apriwandi Apriwandi 한국탄소학회 2021 Carbon Letters Vol.31 No.4
A carbon nanofber was produced from the Areca catechu husk as a supercapacitor electrode, utilizing a chemical activation of potassium hydroxide (KOH) at diferent concentrations. One-stage integrated pyrolysis both carbonization and physical activation were employed for directly converting biomass to activated carbon nanofber. The morphology structure, specifc surface area, pore structure characteristic, crystallinity, and surface compound were characterized to evaluate the infuence on electrochemical performance. The electrochemical performance of the supercapacitor was measured using cyclic voltammetry (CV) through a symmetrical system in 1 M H2SO4. The results show that the KOH-assisted or absence activation converts activated carbon from aggregate into a unique structure of nanofber. The optimized carbon nanofber showed the large specifc surface area of 838.64 m2 g−1 with the total pore volume of 0.448 cm3 g−1, for enhancing electrochemical performance. Benefcial form its unique structural advantages, the optimized carbon nanofber exhibits high electrochemical performance, including a specifc capacitance of 181.96 F g−1 and maximum energy density of 25.27 Wh kg−1 for the power density of 91.07 W kg−1. This study examines a facile conventional route for producing carbon nanofber from biomass Areca catechu husk in economical and efcient for electrode supercapacitor.
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