Hierarchical nanostructured Au–SnO2 for enhanced energy storage performance. (30th October 2020)

• Record Type: Journal Article
• Authors: Geng, Jiguo; Chen, Jun; Ma, Chuantao; Ning, Xuefeng
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 53(2020)
• Page Start: 29395
• Page End: 29406
• Publication Date: 2020-10-30
• Subjects: Gold decorated tin oxide -- Nanoflowers -- Hydrothermal -- Asymmetric solid-state device; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.07.236
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Electrode materials with high energy and power density are mostly essential to overcome traditional fossil fuel use. Herein, we demonstrate the synthesis of Au decorated self-assembled SnO2 nanoflowers consisting of nanorods by a cost-effective and eco-friendly solvothermal process. The as-synthesized SnO2 based materials were employed as electrode material in the energy storage system, which delivered considerably high specific capacitance of 634.3 F/g at a current density of 1 A/g. The electrode material also exhibits excellent cycle stability of 83.52% after 4000 galvanostatic charge–discharge (GCD) cycles. The high specific capacitive value is attributed to the hybrid performance of battery and supercapacitor, more active sites, and higher surface area. A solid state asymmetry device was fabricated using Au–SnO2 and activated carbon (AC) as positive and negative electrodes. The asymmetry device shows an excellent energy density of 168.9 Wh/kg at a power density of 1 kW/kg with an applied current density of 1 A/g. Graphical abstract: Image 1 Highlights: Facile and one-pot synthesis of Au–SnO2 nanocomposite. Au–SnO2 nanocomposite delivered high specific capacitance of 634.4 F/g at 1 A/g. ASC device exhibits an energy density of 168.9 Wh/kg at a power density of 1 kW/kg. Excellent long-term stability with 83.52% capacitance retention after 4000 cycles.