Tuberose surface architecture of Sr(OH)2 film as supercapacitive electrode

Kavyashree,; Raut, Shrikant S.; Sankapal, Babasaheb R.; Pandey, S. N.

doi:10.1016/j.electacta.2017.10.093

Cited by 22 publications

(20 citation statements)

References 43 publications

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“…We observe that small flakes are growing over the tuberose structure. This reveals that the porosity has been increased in comparison to the prior reported undoped Sr(OH) 2 . This enhancement in the porosity is beneficial as the active surface area increases and it ensures an easier pathway for the electrolyte interaction that enhances the specific capacity.…”

Section: Resultsmentioning

confidence: 63%

“…The surface area of undoped sample comes out to be 10.612 m 2 /g as reported earlier. The surface areas of doped samples are higher than that of the undoped sample of Sr(OH) 2 . The pore distribution has been shown in Figure (b).…”

Section: Resultsmentioning

confidence: 91%

“…In Figure (b–d), one can observe the redox peaks, which clearly show that the electrodes have the faradic behavior These peaks, within the potential range −0.8 to 0 V, mainly shows battery type electrode/pseudocapacitive behavior, since ideal capacitor shows the rectangular shape . As the host material is Sr(OH) 2 , so the cathodic peak predominantly corresponds to the reduction of Sr(II) to Sr(0) whereas anodic peak represents oxidation of Sr(0) to Sr(II) . There is an enhancement in the movement of the electrons in the electrode/electrolyte interface due to copper doping.…”

Section: Resultsmentioning

confidence: 95%

“…Amongst different active electrode materials, metal oxides/hydroxides emerge as the potential materials, due to its cost‐effectiveness, high capacity, and environment‐friendly behaviour. Several alkali metals oxide/hydroxide have been studied for supercapacitors, which act as the promising candidates for the electrode …”

Section: Introductionmentioning

confidence: 99%

“…Recently, Sr(OH) 2 with high specific capacity has been reported but it suffers low cycle stability . Incorporation of certain elements can provide the effective way of enhancing the specific capacity as well as the cycle stability.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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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.

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Section: Resultsmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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Enriching Nano‐Heterointerfaces in Proton Conducting TiO₂‐SrTiO₃@TiO₂ Yolk–Shell Electrolyte for Low‐Temperature Solid Oxide Fuel Cells

Du,

Ji,

Zhang

et al. 2024

Advanced Science

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A challenging task in solid oxide fuel cells (SOFCs) is seeking for an alternative electrolyte, enabling high ionic conduction at relatively low operating temperatures, i.e., 300–600 °C. Proton‐conducting candidates, in particular, hold a significant promise due to their low transport activation energy to deliver protons. Here, a unique hierarchical TiO2‐SrTiO3@TiO2 structure is developed inside an intercalated TiO2‐SrTiO3 core as “yolk” decorating densely packed flake TiO2 as shell, creating plentiful nano‐heterointerfaces with a continuous TiO2 and SrTiO3 “in‐house” interfaces, as well the interfaces between TiO2‐SrTiO3 yolk and TiO2 shell. It exhibits a reduced activation energy, down to 0.225 eV, and an unexpectedly high proton conductivity at low temperature, e.g., 0.084 S cm−1 at 550 °C, confirmed by experimentally H/D isotope method and proton‐filtrating membrane measurement. Raman mapping technique identifies the presence of hydrogenated HO─Sr bonds, providing further evidence for proton conduction. And its interfacial conduction is comparatively analyzed with a directly‐mixing TiO2‐SrTiO3 composite electrolyte. Consequently, a single fuel cell based on the TiO2‐SrTiO3@TiO2 heterogeneous electrolyte delivers a good peak power density of 799.7 mW cm−2 at 550 °C. These findings highlight a dexterous nano‐heterointerface design strategy of highly proton‐conductive electrolytes at reduced operating temperatures for SOFC technology.

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

Sharma,

Kavyashree,

Pandey

2024

ChemistrySelect

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In this study, we synthesized a binder‐free composite electrode based on Sr(OH)2/MnO2 material. The active electrode was prepared using the layer‐by‐layer (LBL) technique. The surface architecture of the sample was examined through scanning electron microscopy (SEM) and high‐resolution scanning electron microscopy (FE‐SEM). Further, the microstructural information of the electrode was revealed via transmission electron microscopy (TEM). The composite confirmation was ensured through X‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR), and energy‐dispersive X‐ray spectroscopy (EDX) spectra with mapping analysis. The electrode exhibited the maximum specific capacitance of 554.7 F g−1 at 5 mVs−1 in the 6 M KOH electrolyte. The electrode maintained ~65 % capacitance retention after 10,000 galvanostatic charge‐discharge (GCD) cycles. Furthermore, the assembled symmetric supercapacitor device exhibited the highest specific capacitance value of 124.7 F g−1 @ 5 mVs−1 within a potential span of 1.2 V. This device demonstrated the capability to illuminate light‐emitting diodes (LEDs) of different colors. The energy and power densities of the device were calculated as 26.66 Wh kg−1 and 9884.54 W kg−1 respectively. The stability performance of the device was ~57 % after 10,000 GCD cycles. These findings strongly suggest that the material and the device represent promising options for future energy storage applications.

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Tuberose surface architecture of Sr(OH)2 film as supercapacitive electrode

Cited by 22 publications

References 43 publications

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

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

Enriching Nano‐Heterointerfaces in Proton Conducting TiO₂‐SrTiO₃@TiO₂ Yolk–Shell Electrolyte for Low‐Temperature Solid Oxide Fuel Cells

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

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Tuberose surface architecture of Sr(OH)2 film as supercapacitive electrode

Cited by 22 publications

References 43 publications

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

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

Enriching Nano‐Heterointerfaces in Proton Conducting TiO2‐SrTiO3@TiO2 Yolk–Shell Electrolyte for Low‐Temperature Solid Oxide Fuel Cells

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

Contact Info

Product

Resources

About

Enriching Nano‐Heterointerfaces in Proton Conducting TiO₂‐SrTiO₃@TiO₂ Yolk–Shell Electrolyte for Low‐Temperature Solid Oxide Fuel Cells

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