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

被引：92

作者：

Zhang, Lixing ^{[1
]}

Gu, Huazhi ^{[1
]}

Sun, Haibo ^{[1
]}

Cao, Feifei ^{[4
]}

Chen, Yao ^{[1
]}

Chen, George Zheng ^{[1
,2
,3
]}

机构：

[1] Wuhan Univ Sci & Technol, Coll Mat & Met, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China

[2] Univ Nottingham Ningbo China, Fac Sci & Engn, Dept Chem & Environm Engn, Ningbo 315100, Zhejiang, Peoples R China

[3] Univ Nottingham, Dept Chem & Environm Engn, Fac Engn, Nottingham NG2 7RD, England

[4] Huazhong Agr Univ, Coll Sci, 1 Shizishan St, Wuhan 430070, Peoples R China

来源：

CARBON | 2018年 / 132卷

关键词：

SURFACE FUNCTIONAL-GROUPS; DOUBLE-LAYER CAPACITORS; IONIC LIQUID; ELECTROCHEMICAL CAPACITORS; ELECTROLYTE; GRAPHENE; DENSITY; COMPOSITE; GLUCOSE;

D O I：

10.1016/j.carbon.2018.02.100

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 m(2) g(-1) and total pore volume of 0.81 cm(3) 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. (c) 2018 Elsevier Ltd. All rights reserved.

引用

页码：573 / 579

页数：7

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