Microwave-assisted preparation of peanut shell-based activated carbons and their use in electrochemical capacitors

WU Ming-bo; LI Ru-chun; HE Xiao-jun; ZHANG He-bao; SUI Wu-bin; TAN Ming-hui

doi:10.1016/S1872-5805(15)60178-0

Volume 30 Issue 1

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Article Navigation > New Carbon Mater. > 2015 > 30(1): 86-91

WU Ming-bo, LI Ru-chun, HE Xiao-jun, ZHANG He-bao, SUI Wu-bin, TAN Ming-hui. Microwave-assisted preparation of peanut shell-based activated carbons and their use in electrochemical capacitors. New Carbon Mater., 2015, 30(1): 86-91. doi: 10.1016/S1872-5805(15)60178-0

Citation:

WU Ming-bo, LI Ru-chun, HE Xiao-jun, ZHANG He-bao, SUI Wu-bin, TAN Ming-hui. Microwave-assisted preparation of peanut shell-based activated carbons and their use in electrochemical capacitors. New Carbon Mater., 2015, 30(1): 86-91. doi: 10.1016/S1872-5805(15)60178-0

Citation:

WU Ming-bo, LI Ru-chun, HE Xiao-jun, ZHANG He-bao, SUI Wu-bin, TAN Ming-hui. Microwave-assisted preparation of peanut shell-based activated carbons and their use in electrochemical capacitors. New Carbon Mater., 2015, 30(1): 86-91. doi: 10.1016/S1872-5805(15)60178-0

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Microwave-assisted preparation of peanut shell-based activated carbons and their use in electrochemical capacitors

doi: 10.1016/S1872-5805(15)60178-0

1.
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China;
2.
School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Coal Clean Conversion and Utilization, Anhui University of Technology, Maanshan 243002, China

Funds: Program for New Century Excellent Talents in U., China Ministry of Edn. (NCET-10-0768, NCET-13-0643); National Natural Science Foundation of China (U1361110, 51172285, 51372277).

Received Date: 2014-06-25
Accepted Date: 2015-02-13
Rev Recd Date: 2015-01-20
Publish Date: 2015-02-28

Abstract

Abstract

Activated carbons (ACs) were prepared from peanut shells by KOH activation under microwave heating and were used as electrode materials for electrochemical capacitors (ECs). The pore structure of the ACs was characterized by nitrogen adsorption andthe electrochemical performance by galvanostatic charge-discharge and cyclic voltammetry. Results show that the ACs' specific surface area, total pore volume, specific capacitance, as well as energy density are maximized using anactivation time from 6 to 10 min or KOH/peanut shell mass ratio from 0.6 to 2.0 under otherwise identical conditions. When the KOH/peanut shell mass ratio was 1.0, microwave power was 600 W and activation time was 8 min, the specific surface area of the resulting AC was 1 277 m²/g and its energy density was 8.38 Wh/kg after 1 000 cycles. The KOH activation of peanut shells with microwave heating is an efficient approach for the rapid preparation of low cost ACs for ECs.
- Peanut shell,
- Microwave heating,
- Activated carbon,
- Electrochemical capacitor

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References(25)

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