Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (11): 2295-2299.doi: 10.3866/PKU.WHXB201309241

• COMMUNICATION • Previous Articles     Next Articles

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).

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