One-step Preparation of Alkaline Lignin-based Activated Carbons with Different Activating Agents for Electric Double Layer Capacitor

Different structured activated carbons (ACs) were made from lignin (alkaline) by one-step activation. Using ZnCl2, KOH and K2CO3 as activating agents and the effect of activating agents on the electrochemical properties of the ACs for electric double layer capacitor (EDLC). The ACs prepared by the t...

Full description

Saved in:
Bibliographic Details
Published in:International journal of electrochemical science 2017-08, Vol.12 (8), p.7227-7239
Main Authors: Wu, Yan, Cao, Jing-Pei, Hao, Zhi-Qiang, Zhao, Xiao-Yan, Zhuang, Qi-Qi, Zhu, Jun-Sheng, Wang, Xing-Yong, Wei, Xian-Yong
Format: Article
Language:English
Subjects:
Activated carbon
Activating agent
EDLC
Lignin
Specific capacitance
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Different structured activated carbons (ACs) were made from lignin (alkaline) by one-step activation. Using ZnCl2, KOH and K2CO3 as activating agents and the effect of activating agents on the electrochemical properties of the ACs for electric double layer capacitor (EDLC). The ACs prepared by the three kinds of activating agents are mainly microporous, while the ZnCl2-activated and KOH- activated ACs contain mesoporous through the nitrogen adsorption-desorption test. All the ACs used as electrode for EDLC showed excellent cyclability. The small amount of CO2 produced by K2CO3 decomposition involved in the activation reaction and a series of reactions between carbon of lignin and K2CO3, giving a AC with the maximum specific surface area of 1585 m2 g-1, and the best specific capacitance (Cs) performance of 263.46 F g-1 at the current density 40 mA g-1, using a two-electrode system. The results indicate that the K2CO3 as activating agent to prepared lignin-based AC applied in EDLC is appropriate.
ISSN:1452-3981
1452-3981
DOI:10.20964/2017.08.01