热处理后GO_MnO2电极材料微观结构对电容增效的影响.doc

文档介绍：
热处理后 GO/MnO2 电极材料微观结构对电
容增效的影响#
王令云,王勇,王晓敏**
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(太原理工大学材料科学与工程学院,太原市(030024))
摘要:不同温度下热处理氧化石墨烯(graphene oxide, GO), 并按 20wt%含量将其与 MnO2 复合, 制得
GO/MnO2 复合材料。采用扫描电镜(SEM), X 射线衍射(XRD)及傅里叶红外(FT-IR)表征分析了复合材料的
表面形貌与结构, 四探针测试了其电导率, 并通过循环伏安测试计算得到了复合材料的比电容。结果表明,
600 ℃热处理后的 GO 与 MnO2 复合得到的材料比电容最高, 为 321 F·g-1, 相较于纯相 MnO2 提高了 87%。
热处理 GO 在改善其导电性的同时, 残留的含氧官能团还提供了赝电容, 使 GO 和 MnO2 形成了协同效应。
关键词:氧化石墨烯/MnO2 复合材料;比电容;热处理;官能团
中图分类号:O646
Promotion Effect of GO/MnO2 Microstructure after Heat
Treatment on the Capacitance of posite Material
WANG Linyun, WANG Yong, WANG Xiaomin
(College of Material Science and Engineering,Taiyuan University of
Technology,Taiyuan(030024))
Abstract: Graphene Oxide (GO) was heated in different temperatures, and mixed with MnO2 in
20wt% to form GO/posite materials. The morphology and structure of the materials
were characterized by scanning electron microscopy (SEM), X ray diffraction spectrometry (XRD)
and Fourier Transform Infrared Spectrometer (FT-IR). The electrical conductivity was tested with
a four-probe method. Meanwhile, the specific capacitance was calculated from the curve of the
Cyclic Voltammetry. Results show that the GO/posite materials with 600 ℃ reduced
GO as ponent have the highest specific capacitance of 321 F·g-1, which is 87% promoted
compared with the pure MnO2. As the electrical conductivity is i