Influence of Cu on the Performance of Tuberose Architecture of Strontium Hydroxide Thin Film as a Supercapacitor Electrode

Abstract

A simple, economical successive ionic layer adsorption and reaction (SILAR) method has been used for synthesizing 1, 2 and 3 at.% copper‐doped strontium hydroxide over a stainless‐steel (SS) substrate. X‐ray diffraction reveals the orthorhombic crystal structure of polycrystalline Cu‐doped Sr(OH)2. FTIR and Raman analyses explore the chemical bond analysis of the active material. The morphology of the Cu‐doped Sr(OH)2 was analyzed by using SEM. This shows novel hierarchical‐branched tuberose with flakes. The energy‐dispersive X‐ray spectroscopy (EDAX) also confirms the doping of Cu into Sr(OH)2. The electrochemical properties have been investigated by using cyclic voltammetry (CV) and galvanostatic charge−discharge measurements. It has been perceived that doping clearly affects the supercapacitive behavior. The specific capacity of the 3 at.% Cu‐doped Sr(OH)2 film electrode exhibits a maximum specific capacity of 817 C g−1 at 0.4 mA cm−1 in 1 M Na2SO4 electrolyte, but has a low cycle stability. The 2 at.% Cu‐doped sample shows high cycle stability by retrieving 71 % of its capacity after 5000 cycles. The relationship between the doping concentration and supercapacitive behavior has also been discussed. The good capacitive behavior and cycle stability of the Cu‐doped Sr(OH)2 gives the new perspective for the flexible electrode material, which can be used in the near future as an energy storage material.

Efficient Electrochemical Performance of Sr(OH)2:MnO2 Binary Composites for Solid State Symmetric Supercapacitor

“…Further, the peaks at 853 cm −1 in both Sr(OH) 2 and MnO 2 indicate carbon contamination ν (C−O), commonly observed during chemical synthesis in an open environment. Moreover, high‐intensity peaks in the 1400–1500 cm −1 range correspond to water molecules (H−OH) observed in both pristine material FTIR spectra [50,51] . The broad band around wavenumbers 3300–3400 cm −1 in Figure 2(a and b) is attributed to the stretching vibrations of the physically absorbed −OH peak onto the surface of the prepared electrode [45] .…”

“…Moreover, highintensity peaks in the 1400-1500 cm À 1 range correspond to water molecules (HÀ OH) observed in both pristine material FTIR spectra. [50,51] The broad band around wavenumbers 3300-3400 cm À 1 in Figure 2(a and b) is attributed to the stretching vibrations of the physically absorbed À OH peak onto the surface of the prepared electrode. [45] The peak at ~1060 cm À 1 in Figure 2(a) is due to the stretching vibration of the CÀ O band, and a small peak at wavenumber 1764 cm À 1 is due to the stretching of C=O in Figure 2(c).…”

Photodecoration of tungsten oxide nanoparticles onto eggshell as an ultra-fast adsorbent for removal of MB dye pollutant

“…Photodecoration of WO 3 nanoparticles on the EGS surface increases its performance as a adsorbent. by Photodecoration of WO 3 nanoparticles on the EGS the surface area of it decrease due to the filling of EGS pores by WO 3 nanoparticles which has already been proven that this decline in surface area is a natural consequence of the accumulation of nanostructures within the pores 44 . Evidence of such a claim was www.nature.com/scientificreports/ proved by BET analysis.…”