Hierarchical Flowerlike 3D nanostructure of Co3O4@MnO2/N-doped Graphene oxide (NGO) hybrid composite for a high-performance supercapacitor

Scientific Reports

Joo-Hyung Kim¹  Sivalingam Ramesh²  Heung Soo Kim²  K. Karuppasamy³  Hyun-Seok Kim³ 

[1] Department of Mechanical Engineering, Inha University, Inha-ro 100, Nam-gu;Department of Mechanical, Robotics and Energy Engineering, Dongguk University–Seoul, Pildong-ro 1 gil, Jung-gu;Division of Electronics and Electrical Engineering, Dongguk University–Seoul, Pildong-ro 1 gil, Jung-gu;

关键词: Hybrid Composites;    Graphene Oxide (GO);    High Performance Supercapacitors;    Thermal Reduction Process;    Hierarchical Flow;   

DOI  :  10.1038/s41598-018-34905-7

来源: DOAJ

【 摘 要 】

Abstract The present study investigates the fabrication of hierarchical 3D nanostructures with multi-component metal oxides in the presence of highly-porous graphene and characterized for its applications in high-performance supercapacitors. A hierarchical flowers like 3D nanostructure of Co3O4 @MnO2 on nitrogen-doped graphene oxide (NGO) hybrid composite was synthesized by thermal reduction process at 650 °C in the presence of ammonia and urea. The synthesized Co3O4@MnO2/NGO hybrid composites were studied via Raman, XRD, X-ray XPS, FE-SEM, FE-SEM with EDX, FE-TEM and BET analyses. The electrochemical analysis of Co3O4@MnO2/NGO hybrid composite electrode was investigated using cyclic voltammetry, chronopotentiometry and electrochemical impedance measurements. The hybrid composite electrode showed significant specific capacitance results of up to 347 F/g at 0.5 A/g and a corresponding energy density of 34.83 Wh kg−1 with better rate performance and excellent long-term cycling stability were achieved for 10,000 cycles. The obtained electrochemical results paved a way to utilize Co3O4@MnO2/NGO composite electrode as a promising electrode material in high performance supercapacitors.

【 授权许可】

Unknown