物理化学学报 >> 2013, Vol. 29 >> Issue (11): 2295-2299.doi: 10.3866/PKU.WHXB201309241

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可充镁电池正极材料PTMA/石墨烯

陈强1,2, 努丽燕娜1,2, 郭维3, 杨军1,2, 王久林1,2, 郭玉国3   

  1. 1 上海交通大学化学化工学院, 上海 200240;
    2 上海交通大学平野材料创新研究所, 上海 200240;
    3 中国科学院化学研究所分子纳米结构与纳米技术重点实验室, 北京 100190
  • 收稿日期:2013-06-26 修回日期:2013-09-23 发布日期:2013-10-30
  • 通讯作者: 努丽燕娜, 郭玉国 E-mail:nlyn@sjtu.edu.cn;ygguo@iccas.ac.cn
  • 基金资助:

    国家自然科学基金(21273147)和上海市科委(11JC1405700)资助项目

PTMA/Graphene as a Novel Cathode Material for Rechargeable Magnesium Batteries

CHEN Qiang1,2, NULI Yan-Na1,2, GUOWei3, YANG Jun1,2, WANG Jiu-Lin1,2, GUO Yu-Guo3   

  1. 1 School of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
    2 Hirano Institute for Materials Innovation, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
    3 Key Laboratory of Molecular Nanostructures and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2013-06-26 Revised:2013-09-23 Published:2013-10-30
  • Contact: NULI Yan-Na, GUO Yu-Guo E-mail:nlyn@sjtu.edu.cn;ygguo@iccas.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21273147) and Shanghai Municipal Science and Technology Commission, China (11JC1405700).

摘要:

本文制备了聚4-甲基丙烯酸-2,2,6,6-四甲基哌啶-1-氮氧自由基酯(PTMA)/石墨烯纳米复合材料,并报道了其作为可充镁电池正极材料的电化学性能.通过傅里叶变换红外(FTIR)光谱、扫描电镜(SEM)、透射电镜(TEM)表征复合材料的结构和形貌;循环伏安和恒电流充放电测试其电化学性能.粒径10nm左右的PTMA颗粒分散在具有导电作用的石墨烯表面;在"一代"电解液Mg(AlCl2BuEt)2/四氢呋喃(THF)(0.25mol·L-1)中,22.8mA·g-1充放电电流密度下,PTMA/石墨烯复合材料的起始放电容量可达到81.2mAh·g-1.研究结果表明,含有自由基的有机化合物可以作为可充镁电池的一类新型正极材料,可以进一步通过使用具有高氧化分解电压的电解液来提高其放电容量.

关键词: 能量储存和转换, 可充镁电池, 纳米复合物, 有机正极材料, 石墨烯

Abstract:

We report the synthesis of a poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl methacrylate) (PTMA)/graphene nanocomposite in which graphene is used as a support for improving electronic conductivity. The structure and morphology of the nanocomposite were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). These results reveal that a graphene surface is decorated by nanoparticles of PTMAwith an average size of 10 nm. The electrochemical performance of the PTMA/graphene composite as a cathode material in rechargeable magnesium batteries was investigated using cyclic voltammetry and galvanostatic charge/discharge techniques. In a "first generation" electrolyte Mg(AlCl2BuEt)2/tetrahydrofuran (THF) (0.25 mol·L-1), the material exhibits an initial discharge capacity of 81.2 mAh·g-1 at 22.8 mA·g-1. Further studies will focus on improving the capacity using electrolytes with a wider electrochemical window.

Key words: Energy storage and conversion, Rechargeable magnesium battery, Nanocomposite, Organic cathode material, Graphene

MSC2000: 

  • O646