Facile Synthesis of Nitrogen-Doped Graphene–Ultrathin MnO2 Sheet Composites and Their Electrochemical Performances

• DOI: 10.1021/am400385g
• Publication Date: 2013-03-26T15:09:53Z
• Authors: Shuhua Yang; Xuefeng Song; Peng Zhang; Lian Gao
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Nitrogen-doped graphene-ultrathin MnO2 sheet composites (NGMCs) were prepared through a one-step hydrothermal method at low temperature (120 °C). Ultrathin sheets well-dispersed and tightly anchored on graphene sheets, which doped with nitrogen simultaneously. NGMCs electrode exhibited enhanced capacitive performances relative to those of undoped (GMCs). As the current density increased from 0.2 2 A/g, capacitance still retained ~74.9%, was considerablely higher than that GMCs (27%). Moreover, over 94.2% original maintained after 2000 cycles, indicating good cycle stability materials.