Preparation and Electrical Properties of High Entropy La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 Perovskite Ceramics Powder

Guo, Meng; Zhang, Fengnian; Miao, Yang; Liu, Yufeng; Yu, Jun; Gao, Feng

doi:10.15541/jim20200380

Cited by 12 publications

(8 citation statements)

References 34 publications

(17 reference statements)

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“…After the long-term cycling, the decrease of specific capacitance mainly due to the mechanical failure of the electrodes results in the abscission of the active materials from Ni foam [47]. Compared with the La(CoCrFeMnNi) 0.2 O 3−δ electrode material [48], the performance of HEPOs has a great improvement, and the results can be attributed to the following factors. Firstly, the inactive Al 3+ can prevent the agglomeration of active ions and make these ions effectively participate in redox reaction.…”

Section: Electrochemical Properties Of Hepo Electrodesmentioning

confidence: 99%

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

et al. 2022

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A series of high-entropy perovskite oxides (HEPOs) La(CoCrFeMnNiAlx)1/(5+x)O3−δ (x = 0.4, 0.5, 0.6, and 0.7) have been synthesized by coprecipitation method combined with calcination process and explored as electrodes for supercapacitors. The crystal structure, microstructure, and elemental composition of HEPOs were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS) in detail. The electrochemical properties of HEPOs as supercapacitor electrodes were elucidated. The specific capacitances of HEPOs (x = 0.4, 0.5, 0.6, and 0.7) are 281.84, 353.65, 325.60, and 259.30 F/g at the current density of 1 A/g, respectively. After 2000 cycles, the specific capacitances of HEPOs (x = 0.4, 0.5, 0.6, and 0.7) remain 85.01%, 88.61%, 86.37%, and 91.25%, respectively. Such outstanding electrochemical properties can be attributed to the entropy-stabilized structure caused by mixed six cations in B-site and the Al3+-doping suppressing active ion aggregation during charge—discharge process. This research highlights the potential of HEPOs as electrodes for supercapacitors.

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Section: Electrochemical Properties Of Hepo Electrodesmentioning

confidence: 99%

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

et al. 2022

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“…19f). 179,219 220 good performance capabilities, redox peaks and the relatively gentle curve shows that (FeCoCrMnZn) 3 O 4 is discharged in the form of pseudocapacitance, and the maximum specific capacitance is 340.3 F g −1 (under 1 A g −1 ) (Figs. 19a-19e).…”

Section: Pseudocapacitive High-entropy Ceramicsmentioning

confidence: 99%

Review—Pseudocapacitive Energy Storage Materials from Hägg-Phase Compounds to High-Entropy Ceramics

Zhang

Han

et al. 2021

J. Electrochem. Soc.

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Energy storage material that provide both high power and high energy density are needed to meet current needs. Pseudocapacitive materials have become a focus of research in the field of electrochemical energy storage because of their high specific capacitance and good rate performance. To increase the energy and power density, the key lies in selecting suitable electrode material types or optimizing the electrode layer structure to increase the potential window. This review, starting from the pseudocapacitive materials, introduces the energy storage mechanism of pseudocapacitance, describes the general development of pseudocapacitive materials including oxide materials and their derivative, development of Hägg-phase compounds extended by the MXenes in the past decade, and focuses on the development of several Hägg-phase compounds and the advantages of high-entropy ceramics as future pseudocapacitive materials. Due to the “high-entropy effect”, high-entropy ceramics have better physical and chemical properties to become the most candidate pseudocapacitive material. Focusing on the application potential of the high-entropy ceramics in pseudocapacitive research, they will provide a new pseudocapacitive material system.

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“…16 Guo et al prepared La(Co 0.2 Cr 0.2 Fe 0.2 Mn 0.2 Ni 0.2 )O 3 by a coprecipitation method in 1 M KOH at a current density of 1 A g −1 , reaching a specific capacitance of 154.8 F g −1 . 17 Liang et al prepared (FeCoCrMnZn) 3 O 4 by a solid-state reaction in 1 M KOH at a current density of 1 A g −1 , achieving a specific capacitance of 340.3 F g −1 . 18 Because of their high entropy effect, high entropy oxides can not only guarantee high specific capacitance, but also solve the problems of poor conductivity and structural collapse in the process of charging and discharging.…”

Section: Introductionmentioning

confidence: 99%

Low-dimensional high entropy oxide (FeCoCrMnNi)₃O₄ for supercapacitor applications

Yin

Zhang

et al. 2023

Dalton Trans.

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Preparation and Electrical Properties of High Entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ Perovskite Ceramics Powder

Cited by 12 publications

References 34 publications

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

Review—Pseudocapacitive Energy Storage Materials from Hägg-Phase Compounds to High-Entropy Ceramics

Low-dimensional high entropy oxide (FeCoCrMnNi)₃O₄ for supercapacitor applications

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Preparation and Electrical Properties of High Entropy La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 Perovskite Ceramics Powder

Cited by 12 publications

References 34 publications

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

Review—Pseudocapacitive Energy Storage Materials from Hägg-Phase Compounds to High-Entropy Ceramics

Low-dimensional high entropy oxide (FeCoCrMnNi)3O4 for supercapacitor applications

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Preparation and Electrical Properties of High Entropy La(Co_0.2Cr_0.2Fe_0.2Mn_0.2Ni_0.2)O₃ Perovskite Ceramics Powder

Low-dimensional high entropy oxide (FeCoCrMnNi)₃O₄ for supercapacitor applications