二氧化硅模板法制备介孔碳材料及其电化学性能的研究

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• 英文论文题名：Preparation of mesoporous carbon materials using SiO_2 as template and their electrochemical performance
• 论文作者：李玥 ; 郭元茹
• 英文论文作者：Yue Li ; Yuan-Ru Guo ; Key Laboratory of Bio-based Material Science & Technology (Ministry of Education) ; College of Material Science and Engineering ; Northeast Forestry University
• 年：2016
• 作者机构：东北林业大学生物质材料科学与技术教育部重点实验室;
• 论文关键词：模板法 ; 介孔炭 ; 二氧化硅 ; 比电容
• 英文论文关键词：Template ; Mesoporous carbons ; Silica ; Specific capacitance
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
• 语种：中文
• 分类号：TB383.4;O646
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：177k
• 原文格式：D
• 会议级别：全国

摘要

介孔碳材料因其优异的电化学性质,得到人们广泛关注。我们以木质素磺酸钠为碳源,正硅酸乙酯为硅源,采用二氧化硅硬模板法,550℃下炭化得到具有介孔结构的碳-二氧化硅复合物。通过调节加入正硅酸乙酯的体积获得具有不同比表面积的炭材料。用氢氧化钠除去二氧化硅后得到介孔孔径在20 nm左右的介孔碳材料。用XRD、氮气吸附—脱附、TEM、SEM、XPS和透射电子显微镜对样品进行表征,并利用循环伏安法研究了样品的电容性能。结果表明,虽然未经活化的介孔碳材料(比表面积285 m2·g~(-1)比活化后的碳材料的比表面积低,但却具有较高的电容量,循环伏安测试其比电容为216 F·g~(-1),如图1所示,所有的曲线显示出准矩形形状,说明了所制备的介孔碳材料表现出了优异的电容特性。
Because of super electrochemical performance mesoporous carbons materials get a lot of attention. In our work, mesoporous carbons were prepared by biomaterials using silica as templates. Lignin sulfonate and tetraethyl orthosilicate were used as carbon precursors and silica source. Carbonization was carried out in a tubular furnace at 550 ℃ for 3 h under N_2 flow and mesoporous carbon was obtained after removal of SiO_2. The samples were characterized by XRD, TEM, SEM, XPS and cyclic voltammetry(CV). The specific surface area of the mesoporous carbon can be adjusted by the volume of TEOS. The results show The BET specific surface area of the prepared mesoporous carbon was 285 m~2 · g~(-1), which is much lower than carbon material after being activated. While the Cyclic Voltammetry(CV) test result shows that the specific capacitance of mesoporous carbon without activation is 216 F·g~(-1) is higher than that of our activated carbon. All curves display a quasi-rectangular shape, suggesting that the as-prepared carbon materials exhibit excellent capacitance characteristics.

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