Construction of molybdenum dioxide nanosheets coated on the surface of nickel ferrite nanocrystals with ultrahigh specific capacity for hybrid supercapacitor

A porous graphene–NiFe2O4nanocomposite with high electrochemical performance and high cycling stability for energy storage applications

“…14 The magnied spectrum of NF is shown as an inset, where the assigned Raman peaks correspond to the spinel NF phase. 14,34 The above result conrms the formation of the PGNF composite under a solvothermal method. The ratio of I D /I G is a measure of the formation of the defects in carbon materials.…”

Aerobic Recovered Carbon Fiber Support-Based MoO2//MnO2 Asymmetric Supercapacitor with a Widened Voltage Window

“…Figure 3c shows the O 1s spectrum, in which the main peak at 530.6 eV corresponds to the Mo−O bond in MoO 2 . 44,46,47 In addition, the binding energy peaks at 531.3 and 532.7 eV, respectively, belong to the C−O and CO bonds, which are also seen at 285.8 and 288.3 eV in the C 1s spectrum in Figure 3d. These characteristic peaks mostly result from the skeleton groups of ARCF.…”

“…The priority of C-MoO 2 /ARCF-E may be attributed to the decrease in the size of MoO 2 particles and increase in the size distribution resulting from the positive effect of citric acid (Figure 1c−f), 40,41 which improves the active site ion-diffusion rate and also increases the capacity. 2,47 Third, bare MoO 2 only delivers a specific capacitance of 0.55 F g −1 at 5 A g −1 .…”

Fabrication of WO3·2H2O/BC Hybrids by the Radiation Method for Enhanced Performance Supercapacitors

“…For the rapid increase of global energy demand and the depletion risk of fossil fuels, developing alternative sustainable, affordable, efficient, and clean energy has become very important (Zhao Y. et al, 2016 , 2017 ; Xu et al, 2017 ; Yi et al, 2017 ; Zhao B. et al, 2017 ). Among energy storage devices, supercapacitors (or ultracapacitors) are promising, owing to their safe operation, super-high service life, and great power density (Wang K. et al, 2014 ; Dai et al, 2017 ; Zhao B. et al, 2017 ; Zhao et al, 2018 ). They have wide application areas such as electric vehicles, pulse power systems and portable devices (Wang et al, 2018 ).…”