Preparation of exfoliated graphite containing manganese oxides with high electrochemical capacitance by microwave irradiation

被引：33

作者：

Yan, Jun ^{[1
]}

Fan, Zhuangjun ^{[1
]}

Wei, Tong ^{[1
]}

Qian, Weizhong ^{[2
]}

Zhang, Milin ^{[1
]}

Wei, Fei ^{[2
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

[2] Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China

来源：

CARBON | 2009年 / 47卷 / 14期

关键词：

NANOCOMPOSITES; COMPOSITES;

D O I：

10.1016/j.carbon.2009.08.001

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：

Exfoliated graphite (EG) containing manganese oxides was rapidly and efficiently prepared by microwave irradiation. The maximum expanded volume of EG was up to 317 mL g(-1) when the mass ratio of natural graphite and nitric acid to potassium permanganate was 1:2:2. EG showed specific capacitance of 97.5 F g(-1) at a scan rate of 1 mV s(-1) due to a pseudo-capacitance originated from the deposited manganese oxide particles on the surfaces of EG. After 400 cycles, the specific capacitance of EG increased by 21.2% of initial capacitance demonstrating good cycling stability. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3371 / 3374

页数：4

共 13 条

[11] Hydrated Mn(IV) oxide-exfoliated graphite composites for electrochemical capacitor [J].

Wan, Chuanyun ;

Azumi, Kazuhisa ;

Konno, Hidetaka .

ELECTROCHIMICA ACTA, 2007, 52 (09) :3061-3066

[12] A rapid and efficient method to prepare exfoliated graphite by microwave irradiation [J].

Wei, Tong ;

Fan, Zhuangjun ;

Luo, Guilian ;

Zheng, Chao ;

Xie, Dashou .

CARBON, 2009, 47 (01) :337-339

[13] Electrochemical cyclability mechanism for MnO2 electrodes utilized as electrochemical supercapacitors [J].

Wei, Weifeng ;

Cui, Xinwei ;

Chen, Weixing ;

Ivey, Douglas G. .

JOURNAL OF POWER SOURCES, 2009, 186 (02) :543-550

← 1 2 →