层状结构石墨烯纤维的制备及其电化学性能研究
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- 英文论文题名：Synthesis and Electrochemical Performance of Hierarchically Structured Graphene Fibers
- 论文作者：张梅 ; 贾芸铭 ; 李宏伟
- 英文论文作者：Mei Zhang ; Yunming Jia ; Hongwei Li ; College of Materials Science and Engineering ; Beijing Institute of Fashion Technology
- 年：2016
- 作者机构：北京服装学院材料科学与工程学院;
- 论文关键词：石墨烯纤维 ; 层状结构 ; 电导率 ; 电化学性能
- 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-第三十分会：化学电源
- 语种：中文
- 分类号：TQ342.74
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 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：365k
- 原文格式：D
- 会议级别：全国
摘要
高性能、高柔韧性电极材料的开发是柔性超级电容器在可穿戴产品和智能纺织品中应用的关键,而柔性石墨烯纤维电极制备的难点在于如何同时实现其高比电容和良好的柔韧性。论文采用干纺法以特定温度和化学还原两者结合的方式在固定直径的玻璃管内成功获得自组装石墨烯纤维(GF)。扫描电镜表明经高温还原的石墨烯纤维直径约为130.7μm,纤维内部的石墨烯片层在一定程度上呈有序取向分布,如图1a-b所示。石墨烯纤维的电导率约为3.2×10~4 S/m,能承担350 g的重物,表现出良好的机械柔韧性(图1a和c)。电化学性能测试证实石墨烯纤维在50 mA g~(-1)的比电流下,循环100多次后,比电容始终保持为165 F g~(-1),表现出较高的比电容和良好的循环稳定性,这主要归因于石墨烯纤维具有有序多孔的层状结构。论文研究成果为石墨烯纤维的进一步研究和应用提供理论基础和实验支撑。
Development of high-performance flexible electrode materials is significantly key for the applications of bendable supercapacitors in the wearable electronic devices and smart textiles,and it is difficult to realize simultaneously the high capacity and good flexibility of electrodes.In this paper,the hierarchically structured graphene fibers(GF) is prepared by dry-spinning with a facile chemical reduction and self-assembly strategy.The SEM images indicates the diameter of GF is 130,7μm,and a certain degree of graphene sheet orientation in the obtained GF has been observed,as shown in Fig 1a-b.The conductivity of GF is 3.2×10~4 S/m,and the GF can bear350 g weight,displaying good flexibility(Fig.1a and c).The electrochemical performance reveals that the specific capacity is 165 F g~(-1) after 100 cycles when the current density is 50 mA g~(-1),indicating high capability and cycle stability,which is mainly ascribed to the ordered hierarchical structure.This paper will provide academic foundation and reference for the research and application of graphene fiber.
Development of high-performance flexible electrode materials is significantly key for the applications of bendable supercapacitors in the wearable electronic devices and smart textiles,and it is difficult to realize simultaneously the high capacity and good flexibility of electrodes.In this paper,the hierarchically structured graphene fibers(GF) is prepared by dry-spinning with a facile chemical reduction and self-assembly strategy.The SEM images indicates the diameter of GF is 130,7μm,and a certain degree of graphene sheet orientation in the obtained GF has been observed,as shown in Fig 1a-b.The conductivity of GF is 3.2×10~4 S/m,and the GF can bear350 g weight,displaying good flexibility(Fig.1a and c).The electrochemical performance reveals that the specific capacity is 165 F g~(-1) after 100 cycles when the current density is 50 mA g~(-1),indicating high capability and cycle stability,which is mainly ascribed to the ordered hierarchical structure.This paper will provide academic foundation and reference for the research and application of graphene fiber.
引文
[1]Meng F,Lu W,Li Q,Byun J-H,Oh Y and Chou T-W,Graphene-Based Fibers:A Review.Adv.Mater.2015,27,5113-5131.
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