Fabrication of nanostructured SnO2@Co3O4/nitrogen doped graphene oxide composite for symmetric and asymmetric storage devices

Journal of Materials Research and Technology

Joo-Hyung Kim¹  Surendra K. Shinde²  Hemraj M. Yadav³  Young-Jun Lee⁴  Sivalingam Ramesh⁵  Heung Soo Kim⁵  C. Bathula⁶  Hyun-Seok Kim⁶  Ravi Kumar Cheedarala⁷ 

[1] Corresponding authors.;Department of Biological and Environmental Science, Dongguk University-Seoul, Biomedical Campus, Ilsandong-gu, 10326, South Korea;Department of Energy and Materials Engineering, Dongguk University –Seoul, Pil-dong, Jung-gu 04620, Seoul, South Korea;Department of Mechanical Engineering, Inha University, Incheon, 402-751, South Korea;Department of Mechanical, Robotics and Energy Engineering, Dongguk University –Seoul, Pil-dong, Jung-gu 04620, Seoul, South Korea;Division of Electronics and Electrical Engineering, Dongguk University –Seoul, Seoul 04620, South Korea;School of Mechanical Engineering, Changwon National University, Changwon, 51140 South Korea;

关键词: Ternary composite;    Metal oxides;    Supercapacitor;    Electrochemical properties;   

DOI  :  

来源: DOAJ

【 摘 要 】

The fabrication, and characterization of SnO2@Co3O4/NGO composite with a nanogranular-like morphology was synthesized by a thermal reduction process in presence of ammonia and urea as catalyst. The structure and morphology of the composite were investigated by sophisticated techniques. Cyclic voltammetry was performed to determine the electrochemical performance of the composite electrode for supercapacitor applications. The composite symmetrical electrode was displayed a specific capacitance of ∼375 F g−1 at 0.5 A/g in a 2 M KOH aqueous electrolyte with a capacity retention of ∼93% after 10,000 cycles. The SnO2@Co3O4/NGO composite asymmetric electrode exhibited a specific capacitance of∼256 F/g at 1 A/g and excellent cyclic retention. The improved electrochemical properties of the composite depends on the nanogranular-like morphology, large surface properties, and excellent conductive networks. Therefore, the ternary oxide@NGO composite electrode is promising architecture for energy storage applications.

【 授权许可】

Unknown