Effects of strontium substitution for La on the electrochemical performance of LaAlO3 perovskite nanotubes

Dong, Song‐Tao; Ye, Xin; Fu, Zhuang; Jin, Xiaoyun; Wei, Junlin; Wang, Lei; Zhang, Yamei

doi:10.1016/j.jmrt.2022.04.150

Cited by 15 publications

(5 citation statements)

References 36 publications

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“…The CV curves of the PPy700@SFO@CC electrode (Figure a) keep a similar shape at all scan rates, suggesting good reversibility. The redox peaks can be found, and the peak width increases with the scan rate, indicating an increase in surface contribution . The GCD curves in Figure b exhibit a symmetrical nontriangular feature, indicating that it is a pseudocapacitive reaction with good reversibility.…”

Section: Resultsmentioning

confidence: 91%

“…The redox peaks can be found, and the peak width increases with the scan rate, indicating an increase in surface contribution. 51 The GCD curves in Figure 6b exhibit a symmetrical nontriangular feature, indicating that it is a pseudocapacitive reaction with good reversibility. The specific capacitance is 421, 357, 298, 248, and 163 F g −1 at current densities of 1, 2, 3, 5, and 10 A g −1 , respectively.…”

Section: Resultsmentioning

confidence: 95%

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Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO_3−δ Perovskites on Carbon Cloth

Qiao,

He,

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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The defective structure and high oxygen vacancy concentration of SrFeO 3−δ perovskite enable fast ion-electron transport, but its low conductivity still hinders the high electrochemical performance. Herein, to enhance the conductivity of SrFeO 3−δ -based electrodes, polypyrrole-modified SrFeO 3−δ perovskite on carbon cloth (PPy@SFO@CC) has been successfully fabricated by electrodeposition of polypyrrole (PPy) on the surface of SFO@CC. The optimal PPy700@SFO@CC electrode exhibits a specific capacitance of 421 F g −1 at 1 A g −1 . It was found that the outside PPy layer not only accelerates the electron transport and ion diffusion but also creates more oxygen vacancies in SrFeO 3−δ , enhancing the charge storage performance significantly. Moreover, the NiCo 2 O 4 @CC//PPy700@SFO@CC device maintains a specific capacitance of 63.6% after 3000 cycles, which is ascribed to the weak adhesion forces between the active materials and carbon cloth. Finally, the all-solid-state flexible supercapacitor NiCo 2 O 4 @CC//PPy700@SFO@CC is constructed with PVA-KOH as the solid electrolyte, delivering an energy density of 16.9 W h kg −1 at a power density of 984 W kg −1 . The flexible supercapacitor retains 69% of its specific capacitance after 1000 bending and folding times, demonstrating a certain degree of foldability. The present study opens new avenues for perovskite oxide-based flexible all-solid-state supercapacitors.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 95%

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO_3−δ Perovskites on Carbon Cloth

Qiao,

He,

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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“…To fabricate the ISPD (device schematic shown in figure 1(a)), we grew the amorphous LAO films on a KTO (111) substrate using the pulsed laser deposition (PLD) (see methods for more details). X-ray photoelectron spectroscopy (XPS) spectra (figures S1(a) and (b)) at 834.4 and 838 eV attributed to La 3d 5/2, and peaks at 850.7 and 855.3 eV correspond to La 3d 3/2, while the peak at 73.5 eV corresponds to Al 2p of LAO, indicating the high purity of the deposited LAO films [24,25]. The x-ray diffraction (XRD) pattern (figure S1(c)) shows only one peak from the KTO substrate, confirming the amorphous nature of the LAO films.…”

Section: Resultsmentioning

confidence: 99%

An energy-sensitive interfacial-superconductor photodetector

Wang,

Chen,

Liu

et al. 2023

2D Mater.

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The investigation of photon response in the superconducting state of interfacial superconductors holds both fundamental and practical significance, yet it remains largely unexplored. Here, we report an energy-sensitive photodetector utilizing a microstrip patterned on an interfacial superconductor (LaAlO3/KTaO3), achieving photon response spanning from visible to near-infrared wavelengths. Remarkably, the photon response pulse amplitude at the same wavelength is linearly related to the incident light power, showing a unique detection capability that is different from the conventional superconducting single-photon detectors. Our results suggest that the energy-sensitive characteristic arises from the Kondo effect observed in the two-dimensional electron gases of the interfacial superconductor, wherein incident photons alter the normal resistance. This study broadens the potential applications of interface superconductors and presents a versatile approach for the advancement of energy-sensitive photodetection technologies.

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“…Tyler Mefford et al proposed an oxygen-embedding mechanism to provide a theoretical basis for the energy storage of perovskite materials [17]. Subsequently, the researchers reported some perovskite oxide materials as electrode materials for supercapacitors, such as strontium-based materials [18][19][20], nickel-based materials [21,22], ceriumbased materials [23][24][25], and lanthanum-based materials [26][27][28][29][30]. Lanthanide perovskite oxides have attracted significant attention because they have a stable crystal structure, high thermal stability, fantastic electrical conductivity, low cost, and excellent thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of LaMO3(M=Cr, Mn, and Co) Perovskite Materials

Zhao,

Zhu,

et al. 2024

Coatings

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The utilization of lanthanide perovskite oxides as electrode materials for supercapacitors has garnered significant interest owing to their excellent electrical conductivity, low cost, and excellent thermal stability. In this study, LaMO3(M=Cr, Mn, and Co) nanoparticles were prepared by the sol–gel method coupled with a calcination process. To evaluate the microstructures, morphologies, and electrochemical properties of the samples, a variety of techniques were employed, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area measurements, cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) cycling, and electrochemical impedance spectroscopy (EIS). The results revealed that the LaCoO3 electrodes exhibited a maximum specific capacitance of 118.4 F/g at a current density of 1 A/g, attributed to its higher concentration of oxygen vacancy, larger specific surface area, and lower charge transfer resistance. This discovery substantiates the notion that the electrochemical efficacy is enhanced with the diminishing B-site cation radius in the perovskite LaMO3 system. The charge–discharge process was employed to investigate the anion-intercalation mechanism of LaMO3(M=Cr, Mn, and Co).

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Effects of strontium substitution for La on the electrochemical performance of LaAlO3 perovskite nanotubes

Cited by 15 publications

References 36 publications

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO_3−δ Perovskites on Carbon Cloth

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO_3−δ Perovskites on Carbon Cloth

An energy-sensitive interfacial-superconductor photodetector

Electrochemical Properties of LaMO3(M=Cr, Mn, and Co) Perovskite Materials

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Effects of strontium substitution for La on the electrochemical performance of LaAlO3 perovskite nanotubes

Cited by 15 publications

References 36 publications

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO3−δ Perovskites on Carbon Cloth

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO3−δ Perovskites on Carbon Cloth

An energy-sensitive interfacial-superconductor photodetector

Electrochemical Properties of LaMO3(M=Cr, Mn, and Co) Perovskite Materials

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Product

Resources

About

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO_3−δ Perovskites on Carbon Cloth

Flexible All-Solid-State Asymmetric Supercapacitors Based on PPy-Decorated SrFeO_3−δ Perovskites on Carbon Cloth