modifiedGrapheneElectrodes详解.PDFVIP

Supporting Information High Performance Supercapacitors Based on Poly(ionic liquid)- modified Graphene Electrodes 1 1 2 3 3 TaeYoung Kim , HyunWook Lee , Meryl Stoller , Daniel R. Dreyer , Christopher W. Bielawski 2* 1* Rodney S. Ruoff , Kwang S. Suh 1 Department of Materials Science and Engineering, Korea University, 5-1 Anam-dong Seongbuk-gu, Seoul 136-713, South Korea 2 Department of Mechanical Engineering and the Texas Materials Institute, The University of Texas at Austin, One University Station C2200, Austin, TX 78712, USA 3 Department of Chemistry and Biochemistry, The University of Texas at Austin, One University Station, A5300, Austin, TX 78712, USA. E-mail: suhkwang@korea.ac.kr (K. S. Suh) and r.ruoff@mail.utexas.edu (R. S. Ruoff) S1: Poly(ionic liquid)-modified Reduced Graphene Oxide (PIL:RG-O) Materials. The XPS measurements for PIL:RG-O materials were performed with ESCA 2000 system (VG Microtech) using a monochromatized aluminum K anode. In Figure S1, the C 1s XPS spectrum of G-O α indicates a considerable degree of oxidation with different components which can be deconvoluted into 2 2 sp -hybridized C-C, C-O, and C=O. The peaks at 284.5 eV corresponds to the sp -hybridized C-C and the peaks between 286 and 290 eV are typically assigned to the oxygen-containing groups such as 4 epoxide, hydroxyl, carboxylic groups. In the case of PIL:RG-O, it is clearly shown that the pea