Study on the high-temperature electrochemical performance of perovskite-type oxide LaFeO3 with carbon modification

Pei, Yaru; Li, Yuan; Yinghui, Jerry; Shen, Wenzhuo; Wang, Yunchai; Yang, Shuqin; Han, Shumin

doi:10.1016/j.ijhydene.2015.05.047

Cited by 20 publications

(4 citation statements)

References 19 publications

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“…Zayani et al 48 showed that the charge transfer resistance of ZnFe 2 O 4 oxide can reach 4.36 Ω cm 2 after activation. Pei et al 60 reported that the calculated charge transfer resistance is 1.2 and 1 mΩ for untreated LaFeO 3 and carbon coated LaFeO 3 electrodes respectively, which were both prepared by polyaniline (PANI) pyrolysis method.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical study of LaGaO₃ as novel electrode material of hydrogen battery (Ni/MH)

Tliha

Kaabi

Khaldi

et al. 2022

Env Prog and Sustain Energy

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The physico‐chemical performance of the novel anode LaGaO3 for Ni/MH accumulators was studied using the electrochemical impedance spectroscopy (EIS) method during cycling. The measured EIS data of the perovskite oxide are fitted according to the proposed equivalent circuit representing various processes involved in the mechanism of hydrogenation/dehydrogenation reactions of the oxide. Different kinetic elements such as current density I0, charge transfer resistance Rct, hydrogen transfer resistance Rht, double layer capacitance Cdl, and mass hydrogen diffusion Y0 were estimated under cycling. The EIS results relieved that current density I0 of the oxide increases quickly during the activation process and its maximum value is obtained at the second cycle (377.67 mA g−1). The degradation of the charge transfer rate of the oxide after activation can be ascribed to the corrosion of the electrode/electrolyte interface. The variation of the Warburg impedance Y0 could be attributed to the change in the morphological and the structure of the working electrode over cycling. The EIS analysis relieved that electrochemical behavior of the oxide is controlled by the charge‐transfer rate and the modification of the electrode surface.

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Section: Resultsmentioning

confidence: 99%

Electrochemical study of LaGaO₃ as novel electrode material of hydrogen battery (Ni/MH)

Tliha

Kaabi

Khaldi

et al. 2022

Env Prog and Sustain Energy

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“…10 Our group has prepared the carbon-coated LaFeO 3 composites using the polyaniline (PANI) pyrolysis method. 11 Results show that the carbon layers prevent the particles from aggregation and ameliorate the high-temperature electrochemical performance of the LaFeO 3 electrode. Generally, the effects of carbon coating can be affected by many factors, such as carbon content, layer thickness, morphology, uniformity and so on.…”

Section: Introductionmentioning

confidence: 95%

The effect of carbon–polyaniline hybrid coating on high-temperature electrochemical performance of perovskite-type oxide LaFeO₃ for MH–Ni batteries

Pei

et al. 2015

Phys. Chem. Chem. Phys.

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An efficient carbon-polyaniline (PANI)-coated method was applied for perovskite-type oxide LaFeO3 to enhance its high-temperature electrochemical performance. Transmission electron microscopy (TEM) results reveal that LaFeO3 particles are evenly coated with carbon and PANI hybrid layers after carbon-PANI treatment. The carbon layers prevent the nanosized LaFeO3 particles from aggregation and allow the electrolyte to penetrate in every direction inside the particles. The PANI layers also enhance the electrocatalytic activity, facilitating hydrogen protons transferring from the electrolyte to the electrode interface. The cooperation of carbon and PANI hybrid layers results in a significant enhancement of the electrochemical performance at high temperatures. At an elevated temperature (60 °C), the maximum discharge capacity of the LaFeO3 electrodes remarkably increases from 231 mA h g(-1) to 402 mA h g(-1) and the high rate dischargeability at a discharge current density of 1500 mA g(-1) (HRD1500) increases from 22.7% to 44.3%. Moreover, the hybrid layers mitigate the corrosion of LaFeO3 electrodes by reducing the loss of active materials in the alkaline electrolyte, leading to increase in the capacity retention rate from 67.1% to 77.6% after 100 cycles (S100).

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“…The LaFeO 3 compounds substituted in A-site and B-site with the general formula of La 1-x A x FeO 3 and LaFe 1-x B x O 3 have been studied thanks to their extensive usage in applications. Due to their important physical properties, La 1-x A x Fe 1-y M y O 3-d compounds (A = Ca, Sr, Ba…, M = Mn, Ti, Cr, Co…) are used in many applications, such as toxic gas detection materials [8][9][10], oxygen dense membrane [11][12][13], oxygen sensor [14], batteries [15], solid oxide fuel cells (SOFCs) [16][17][18][19][20][21][22], and catalytic materials [23,24]. Different elaboration methods have been used to synthesize lanthanum ferrites, such as the solid-state reaction, co-precipitation, Sol-Gel, and hydrothermal [25].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and study of the structural and dielectric properties of La0.67Ca0.2Ba0.13Fe1−xMnxO3 ferrites (x = 0, 0.03 and 0.06)

Dhahri

Zaouali

Benali

et al. 2021

J Mater Sci: Mater Electron

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The La 0.67 Ca 0.2 Ba 0.13 Fe 1-x Mn x O 3 perovskite compounds with different manganese concentrations (x = 0.0, 0.03, 0.06) were synthesized by the autocombustion method and annealed at 700 °C. The X-ray diffraction (XRD) data indicated that all obtained compounds crystallize in the cubic structure with the Pm3m space group. The increase in the substitution rate has been found to lead to the decrease in the crystallite size value characterized by X-ray diffraction. The dielectric properties of these samples, using a complex impedance spectroscopy technique, were also performed as a function of frequency and temperature. A suitable equivalent electrical circuit was used to assess the contributions of electrode, grains, and grain boundaries in the complex impedance results. Activation energies were determined from different methods. Nyquist plots were consistent with three circuits in series, each one with a capacitance in parallel with a resistance. The conduction mechanism follows the NSPT model for the three samples at T \ 280 K, in which the rise in substitution rate increases the binding energy of carriers. Above 280 K, the appropriate model is the Correlated Barrier Hopping (CBH) for x = 0, while the overlapping large polaron tunneling (OLPT) process has been confirmed for both samples x = 0.03 and x = 0.06. Our compounds have high electrical properties, and good thermal and chemical stability. They are susceptible to many technological applications, such as gas sensors, capacitors, filters, resonators, new read heads, and solid oxide fuel cells.

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Study on the high-temperature electrochemical performance of perovskite-type oxide LaFeO3 with carbon modification

Cited by 20 publications

References 19 publications

Electrochemical study of LaGaO₃ as novel electrode material of hydrogen battery (Ni/MH)

Electrochemical study of LaGaO₃ as novel electrode material of hydrogen battery (Ni/MH)

The effect of carbon–polyaniline hybrid coating on high-temperature electrochemical performance of perovskite-type oxide LaFeO₃ for MH–Ni batteries

Synthesis and study of the structural and dielectric properties of La0.67Ca0.2Ba0.13Fe1−xMnxO3 ferrites (x = 0, 0.03 and 0.06)

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Study on the high-temperature electrochemical performance of perovskite-type oxide LaFeO3 with carbon modification

Cited by 20 publications

References 19 publications

Electrochemical study of LaGaO3 as novel electrode material of hydrogen battery (Ni/MH)

Electrochemical study of LaGaO3 as novel electrode material of hydrogen battery (Ni/MH)

The effect of carbon–polyaniline hybrid coating on high-temperature electrochemical performance of perovskite-type oxide LaFeO3 for MH–Ni batteries

Synthesis and study of the structural and dielectric properties of La0.67Ca0.2Ba0.13Fe1−xMnxO3 ferrites (x = 0, 0.03 and 0.06)

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Electrochemical study of LaGaO₃ as novel electrode material of hydrogen battery (Ni/MH)

Electrochemical study of LaGaO₃ as novel electrode material of hydrogen battery (Ni/MH)

The effect of carbon–polyaniline hybrid coating on high-temperature electrochemical performance of perovskite-type oxide LaFeO₃ for MH–Ni batteries