Controlled synthesis of perovskite lanthanum ferrite nanotubes with excellent electrochemical properties

Li, Zijiong; Zhang, Weiyang; Yuan, Chaosheng; Su, Yuling

doi:10.1039/c6ra27423d

Cited by 68 publications

(19 citation statements)

References 39 publications

(36 reference statements)

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“…The La3d spectra of both perovskite samples (Figure 5D) represent two peaks at 830‐842 eV and 848‐858 eV, which correspond to La3d 5/2 and La3d 3/2 . The split between them is 16.8‐16.9 eV which confirms the La 3+ oxidation state 90 . Subpeaks at opposite positions correspond to an electron transfer from the O2p valence band to an empty La4f orbital 91 …”

Section: Resultsmentioning

confidence: 64%

Hydrothermal microwave‐assisted synthesis of LaFeO₃ catalyst for N₂O decomposition

et al. 2020

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Lanthanum orthoferrite powders were synthesized via one-step hydrothermal reactions under mild conditions using microwave and conventional heating. The use of microwave irradiation during the synthesis allows one to obtain nanocrystalline LaFeO 3 with a higher yield and reduced crystallite and particle size within a 16 times shorter duration (3 hours) at a lower temperature of 220°C as compared to the conventional heating. The catalytic decomposition of nitrous oxide was performed over both samples, it was shown that the sample obtained under microwave conditions demonstrates enhanced activity as a catalyst: N 2 O decomposes completely at 700°C over the catalyst formed at microwave conditions, while the comparative catalyst prepared by conventional heating reaches a lower conversion of only 60% at the same temperature and catalytic reaction conditions.

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Section: Resultsmentioning

confidence: 64%

Hydrothermal microwave‐assisted synthesis of LaFeO₃ catalyst for N₂O decomposition

et al. 2020

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“…It reveals that the LaMnO 3 at 900°C has the better specific capacitance value. According to this results, the result can be obtained by the formula: (mAh/g) is the specific capacitance, I (mA) represents the response discharge current, Δ t (s) is the discharge time, m (g) is the mass of the active material [3,5,23]. Figure 3(b) illustrates the specific capacitance of LaMnO 3 electrode as a function of current density.…”

Section: Results and Discussingmentioning

confidence: 99%

“…The energy storage performances of supercapacitors mainly depend on the electrode materials [1,2]. In generally, three categories electrode materials are carbon materials, transition-metal oxide and conducting polymers respectively [2][3][4][5]. Carbon material is one of the important electrode materials due to their high electrical conductivity and stability.…”

Section: Introductionmentioning

confidence: 99%

“…15 MnO 3 have been discussed as supercapacitor electrodes using the solegel method [2,[14][15][16][17]. However, the effect of the calcination temperature and time in the fabricating samples as electrode materials of supercapacitors is blurry [3,5,17,18]. To improve the properties of electrochemical energy storage device, In addition, rGO is a two-dimensional carbon nanostructure with excellent electrical conductivity and physicochemical stability.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of LaMnO₃-reduced graphene oxide or Sr composite and their application in electrochemical properties

Chen

Liu

Jiao

et al. 2020

Mater. Res. Express

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Perovskite structural metal oxides as electrode materials present promising and potential properties due to excellent storage characteristics. Herein, series of perovskite type LaMnO 3 nanopowders were synthesized by the 'sol-gel' method with a heat treatment at different temperatures (700°C-900°C) for different times. The morphology characterization, structures and electrochemical performances were investigated. The preferable sample for electrochemical energy storage device can be obtained at 900°C with 2 h annealing. Furthermore, to improve the properties of the electrode materials, the samples were combined and rectified with reduced graphene oxide (rGO) and strontium (Sr), respectively. The results indicate that the rGO/Sr-doped LaMnO 3 oxide materials have excellent electrochemical properties. These findings are beneficial for the selection and preparation of electrode materials.

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“…Various research concerning anion-intercalation supercapacitors has considered that the suitable choice of the octahedral site cation intends to enhance the O vacancy or decrease the inherent resistivity (Elsiddig et al 2017;Zhu et al 2016;Li et al 2017a). Besides, the electrochemical display is based on the octahedral site elements.…”

Section: Influence Of Cation Substitution In the Octahedral Site Of Pmentioning

confidence: 99%

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

et al. 2020

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Supercapacitors are increasingly used for energy conversion and storage systems in sustainable nanotechnologies. Graphite is a conventional electrode utilized in Li-ion-based batteries, yet its specific capacitance of 372 mA h g −1 is not adequate for supercapacitor applications. Interest in supercapacitors is due to their high-energy capacity, storage for a shorter period and longer lifetime. This review compares the following materials used to fabricate supercapacitors: spinel ferrites, e.g., MFe 2 O 4 , MMoO 4 and MCo 2 O 4 where M denotes a transition metal ion; perovskite oxides; transition metals sulfides; carbon materials; and conducting polymers. The application window of perovskite can be controlled by cations in sublattice sites. Cations increase the specific capacitance because cations possess large orbital valence electrons which grow the oxygen vacancies. Electrodes made of transition metal sulfides, e.g., ZnCo 2 S 4 , display a high specific capacitance of 1269 F g −1 , which is four times higher than those of transition metals oxides, e.g., Zn-Co ferrite, of 296 F g −1. This is explained by the low charge-transfer resistance and the high ion diffusion rate of transition metals sulfides. Composites made of magnetic oxides or transition metal sulfides with conducting polymers or carbon materials have the highest capacitance activity and cyclic stability. This is attributed to oxygen and sulfur active sites which foster electrolyte penetration during cycling, and, in turn, create new active sites.

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Controlled synthesis of perovskite lanthanum ferrite nanotubes with excellent electrochemical properties

Abstract: In this work, we have fabricated a series of perovskite-type oxide LaFeO3 samples using a simple sol–gel method and further calcination treatment.

Cited by 68 publications

References 39 publications

Hydrothermal microwave‐assisted synthesis of LaFeO₃ catalyst for N₂O decomposition

Hydrothermal microwave‐assisted synthesis of LaFeO₃ catalyst for N₂O decomposition

Synthesis of LaMnO₃-reduced graphene oxide or Sr composite and their application in electrochemical properties

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

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Controlled synthesis of perovskite lanthanum ferrite nanotubes with excellent electrochemical properties

Abstract: In this work, we have fabricated a series of perovskite-type oxide LaFeO3 samples using a simple sol–gel method and further calcination treatment.

Cited by 68 publications

References 39 publications

Hydrothermal microwave‐assisted synthesis of LaFeO3 catalyst for N2O decomposition

Hydrothermal microwave‐assisted synthesis of LaFeO3 catalyst for N2O decomposition

Synthesis of LaMnO3-reduced graphene oxide or Sr composite and their application in electrochemical properties

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

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Hydrothermal microwave‐assisted synthesis of LaFeO₃ catalyst for N₂O decomposition

Hydrothermal microwave‐assisted synthesis of LaFeO₃ catalyst for N₂O decomposition

Synthesis of LaMnO₃-reduced graphene oxide or Sr composite and their application in electrochemical properties