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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：校长助理
其他任职：精细化工国家重点实验室副主任，辽宁省低碳资源高值化利用重点实验室主任
性别：男
毕业院校：中科院山西煤化所
学位：博士
所在单位：化工学院
学科：工业催化. 化学工艺. 能源化工
办公地点：大连市凌工路2号大连理工大学西部校区化工楼，邮编：116024
联系方式：0411-84986112
电子邮箱：anhuilu@dlut.edu.cn
Mesoporous manganese dioxide prepared under acidic conditions as high performance electrode material for hybrid supercapacitors
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论文类型：期刊论文
发表时间：2012-05-01
发表刊物：MICROPOROUS AND MESOPOROUS MATERIALS
收录刊物：SCIE、EI
卷号：153
页面范围：247-253
ISSN号：1387-1811
关键字：Mesoporous materials; Hybrid supercapacitor; Manganese dioxide; Birnessite; Acid treatment
摘要：High surface area mesoporous manganese dioxide (MnO2) with ca-phase crystalline structure has been synthesized by the reduction of potassium permanganate with ethylene glycol under acidic conditions. Nitrogen sorption analyses show that MnO2 synthesized under acidic conditions exhibits a type IV isotherm, indicating a mesoporous character. Electrochemical performances of MnO2 samples as supercapacitor electrode materials have been studied in a three-electrode system. A hybrid supercapacitor based on using a composite material (MnO2&Activated Carbon) as the positive electrode and activated carbon as the negative electrode has been fabricated. The hybrid supercapacitor fabricated using MnO2 synthesized under acidic conditions has excellent large current charge-discharge performance, and shows a practical cell voltage of 1.8 V and a capacitance of 22.1 F g(-1) after 1500 cycles even in the presence of the dissolved oxygen. MnO2 synthesized in the absence of acid shows poor cycle performance and a low capacitance. (C) 2012 Elsevier Inc. All rights reserved.