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Molecular level one-step activation of agar to activated carbon for high performance supercapacitors

Zhang, Lixing; Gu, Huazhi; Sun, Haibo; Cao, Feifei; Chen, Yao; Chen, George Zheng


Lixing Zhang

Huazhi Gu

Haibo Sun

Feifei Cao

Yao Chen


Activated carbon was synthesized by a simple one-step calcination of deoxygenated agar in a hot KOH aqueous solution, in which KOH plays both deoxidant and activation agent. The deoxygenation course omits high temperature carbonization in the conventional technology and leads to molecular level activation of agar in subsequent one-step calcination. The one-step activated carbon has superior specific surface area of 1672?m2?g?1 and total pore volume of 0.81?cm3?g?1. It also shows a maximum specific capacitance of 226?F?g?1 in the KOH electrolyte, which is 1.4 times as high as that for the activated carbon by the conventional two-step method. This study provides potentially economical and effective means for the production of commercial activated carbon with high porosity for supercapacitors.


Zhang, L., Gu, H., Sun, H., Cao, F., Chen, Y., & Chen, G. Z. (2018). Molecular level one-step activation of agar to activated carbon for high performance supercapacitors. Carbon, 132, 573-579.

Journal Article Type Article
Acceptance Date Feb 26, 2018
Online Publication Date Feb 28, 2018
Publication Date 2018-06
Deposit Date Mar 13, 2018
Publicly Available Date Mar 1, 2019
Journal Carbon
Print ISSN 0008-6223
Electronic ISSN 0008-6223
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 132
Pages 573-579
Public URL
Publisher URL


revised manuscript Chen.pdf (1.1 Mb)

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