液相－固相还原法克服团聚制备高性能超级电容器用石墨烯电极材料
PDF下载 (633)李选福,周 明,田 天,秦禄昌.液相－固相还原法克服团聚制备高性能超级电容器用石墨烯电极材料[J].宁波大学学报(理工版),2013,26(04):56-60.DOI:
LI Xuan-fu,ZHOU Ming,TIAN Tian,QIN Lu-chang.High-performance Graphene by Liquid-solid Reduction and its Application in Supercapacitors[J].Journal of Ningbo University(Natural Science & Engineering Edition),2013,26(04):56-60.DOI:
| Title: | High-performance Graphene by Liquid-solid Reduction and its Application in Supercapacitors |
| 作者: | 李选福, 周 明, 田 天, 秦禄昌 |
| Author(s): | LI Xuan-fu, ZHOU Ming, TIAN Tian, QIN Lu-chang |
| 关键词: | 液相－固相还原; 石墨烯团聚; 超级电容器; 氧化还原法; 高比电容 |
| Keywords: | liquid-solid reduced graphene; agglomeration of graphene; high specific capacitance; oxidation- reduction method; supercapacitor |
| 分类号: | O64 |
| 文献标识码: | A |
| 摘要: | 以水合肼为还原剂采用液相预还原－冷冻干燥－固相充分还原的方法制备的石墨烯电极材料具有十分优越的电化学性能, 在超级电容器中比电容值达到336F·g-1 (10mV·s-1, 循环伏安法), 较液相还原石墨烯(270F·g-1)提高24%, 同时亦优于固相还原石墨烯(323F·g-1). 对液相预还原氧化石墨烯采取冷冻干燥, 既避免了液相直接还原干燥过程中的团聚现象, 同时也有效地增加了固相还原石墨烯的无序度, 从而进一步提高了石墨烯的电化学性能. |
| Abstract: | Using the oxidation-reduction method, the high-performance graphene is prepared from graphite utilizing the liquid-solid reduction in which agglomeration is effectively avoided. Its specific capacitance (SC) in supercapacitors reaches 336F·g-1 (measured by cyclic voltammetry at 10mv·s-1) in comparison with the SC of liquid reacted graphene and solid reacted graphene being 270 F·g-1 and 316 F·g-1, respectively. The functional groups in partially reduced graphene oxide reduces the agglomeration of the graphene sheets. As a result, the diffusion of electrolyte ions between graphene sheets is improved and eventually led to improved electrochemical performance when used in supercapacitors. |
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| 备注/Memo: | 收稿日期: 2013-03-29. 基金项目: 国家重点基础研究发展计划（2009CB930801）; 国家自然科学基金（21003145, 11204325）; 浙江省自然科学基金（D4080489）; 浙江省科技创新团队项目（2009R50010）; 宁波市创新团队项目（2009B21005）. 第一作者: 李选福（1986-）, 男, 湖北恩施人, 在读硕士研究生, 主要研究方向: 纳米材料储能器件. E-mail: 516092559@qq.com *通信作者: 秦禄昌（1963-）, 男, 黑龙江人, 博导/教授, 主要研究方向: 电子显微技术、纳米材料及储能器件. E-mail: qinluchang@gmail.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
