摘要
The need for long-lasting,inexpensive energy storage devices with large capacities has increased alongside the development of new technologies.However,new materials with excellent performance and alternative strategies need to be discovered yet,such as the application of oxide ion conductors in supercapacitor technology,which has not been explored recently.For the purpose,we fabricated new solid electrolyte-based nanocomposites(Bi_(3)Y_(1-x)Sm_(x)O_(6))with nominal x-values through a simple solid state reaction route.Structural patterns confirm the phase,while morphology verifies the uniformly dispersed nanostructures across the material with roughly platelet-like shapes.The X-ray photoelectron spectroscopy(XPS)portrays presence of each constituent with oxidation states and more vacancies.IRreflectance spectroscopy was utilized to measure phonons vibrational behavior and optical trends of the Bi_(3)Y_(1-x)Sm_(x)O_(6)nanocomposites.The optimal composition shows the increased surface area and well distributed pore size as compared to parent sample.Electrochemical performance proposes the excellent specific capacitance(C_(sp))of 1150.24 F/g at 1 A/g with excellent cyclic stability(92.4%cyclic retention over 8000 cycles)for Bi3Y0.80Sm0.20O6 nanocomposite.The assembled asymmetric supercapacitor device for Bi_(3)Y_(0.80)Sm_(0.20)O_(6)nanocomposite reveals specific capacitance of 702.45 F/g at 1 A/g with high energy density(24.36 Wh/kg)and excellent power density(2344.13 W/kg),with 82.87%capacitive retention throughout 8000 cycles.Furthermore,the asymmetrical solid-state supercapacitor shows remarkable capacitive performance,allowing to energize a single light-emitting diode(LED)for over 47 s proving its workability for physical applications.The results provide strong evidence of the device's exceptional reliability for energy storage applications.
基金
Project supported by the National Natural Science Foundation of China(U20A20274,52061003)
the Natural Science Foundation of Yunnan Province(202301AT070209)。
