高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (3): 619.doi: 10.7503/cjcu20130510

• 物理化学 • 上一篇    下一篇

石墨烯纸的制备及电容特性

周颖1(), 姜磊1,2, 阎景旺2, 王春雷1, 肖南1   

  1. 1. 大连理工大学化工学院, 辽宁省能源材料化工重点实验室, 精细化工国家重点实验室, 大连 116024
    2. 中国科学院大连物理化学研究所, 大连 116024
  • 收稿日期:2013-05-30 出版日期:2014-03-10 发布日期:2019-08-01
  • 作者简介:联系人简介: 周 颖, 女, 副教授, 主要从事多孔碳材料的合成及其电化学电容特性研究. E-mail: zhouying.dlut@dlut.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51177156/E0712, 21276045)资助

Preparation and Electrochemical Capacitive Properties of Graphene Paper

ZHOU Ying1,*(), JIANG Lei1,2, YAN Jingwang2, WANG Chunlei1, XIAO Nan1   

  1. 1. Liaoning Key Lab for Energy Material and Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
    2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116024, China
  • Received:2013-05-30 Online:2014-03-10 Published:2019-08-01
  • Contact: ZHOU Ying E-mail:zhouying.dlut@dlut.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.51177156/E0712, 21276045)

摘要:

利用未经任何分散处理的氧化石墨溶胶在气-液界面自组装得到氧化石墨纸(ϕ=10 cm), 将氧化石墨纸在不同温度下用水合肼蒸气还原制得石墨烯纸. 采用扫描电子显微镜(SEM)、 X射线衍射(XRD)、 Raman光谱、 X射线光电子能谱(XPS)及氮吸附对还原前后样品的微观结构、 表面特性、 元素组成及比表面积进行了表征, 在此基础上考察了还原处理及还原温度对材料电容特性的影响. 结果表明, 在150 ℃下还原氧化石墨纸得到的石墨烯纸具有较好的电化学电容特性, 其在1000 mA/g恒定充放电电流密度下, 6 mol/L KOH电解质溶液中的质量比电容达到142 F/g, 1000次充放电循环后电容保持率为99.8%.

关键词: 自组装, 氧化石墨纸, 水合肼蒸气, 石墨烯纸, 超级电容器

Abstract:

Large-scale(ϕ=10 cm) graphene paper(GP) was prepared by the reduction of graphite oxide paper(GOP) self-assembled at the liquid/air interface with hydrazine hydrate vapor. The morphology, structure, components and BET surface area of GOP and GP were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), Raman spectroscopy, X-ray photoelectron spectroscopy(XPS) and nitrogen adsorption-desorption analysis. Furthermore, influence of reduction and reduction temperature on the super-capacitive properties was investigated. It is found that the graphene paper fabricated at 150 ℃ exhibits high capacitive behavior and long charge/discharge cycle life at a current density of 1000 mA/g. The discharge capacitance of the material in an aqueous electrolyte of 6 mol/L KOH is 142 F/g and the capacitance retention is 99.8% after 1000 charge/discharge cycles.

Key words: Self-assemble, Graphite oxide paper, Hydrazine hydrate vapor, Graphene paper, Super-capacitor

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