Effect of processing route on the crystal structure and physical properties of bixbyite high-entropy oxides

Park, Taesung; Javadinejad, Hamid Reza; Kim, Young-Kuk; Chang, Hye Jung; Choi, Haneul; Choo, Woong; Ashong, Andrews Nsiah; Lee, Youn Seoung; Kim, Jeoung Han

doi:10.1016/j.jallcom.2021.162108

Cited by 18 publications

(5 citation statements)

References 54 publications

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“…The sol-gel method prepares metal alkoxide or inorganic salt solutions into sol or gel, followed by lowtemperature heat treatment to convert the gel into oxides [278][279][280]. The preparation process includes the preparation of sol, sol-gel transformation, and gel drying, with gel preparation and drying being crucial steps.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

The emerging high-entropy strategy: a booster to the development of cathode materials for power batteries

Huang,

Zhu,

Liu

et al. 2024

Journal of Advanced Ceramics

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The coordinated development of new energy vehicles and the energy storage industry has become inevitable to reduce carbon emissions. The cathode material is the key material that determines the energy density and cost of a power battery, while the currently developed and applied cathode material can not meet the requirements of high specific capacity, low cost, safety and good stability. High-entropy material is a new type of single-phase material composed of multiple principal elements in equimolar or near-equimolar ratios. The interaction between multiple elements can play an important role in improving the comprehensive properties of the material, which is expected to solve the limitations of battery materials in practical applications. Based on this, this review provides a comprehensive overview of the current development status and modification strategies of power J u s t A c c e p t e d batteries (lithium-ion battery and sodium-ion battery), proposes a high-entropy design strategy, and analyzes the structure-activity relationship between the high-entropy effect and battery performance. Finally, future research topics of high-entropy cathode materials are proposed, including computational guide design, specific synthesis methods, high-entropy electrochemistry and high-throughput databases. This review aims to provide practical guidance for the development of high-entropy cathode materials for next-generation power batteries.

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Section: J U S T a C C E P T E Dmentioning

confidence: 99%

The emerging high-entropy strategy: a booster to the development of cathode materials for power batteries

Huang,

Zhu,

Liu

et al. 2024

Journal of Advanced Ceramics

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“…There are other kinds of structures apart from the crystal structures mentioned above, including pyrochlore, [ 40 ] bixbyite, [ 41 ] rutile, [ 42 ] and CaF 2 ‐type. [ 43 ] Due to the unique high entropy effects, the above‐mentioned HEOs have superior phase stability, distinctive electrical conductivity, and magnetic versatility compared with the analogous structures of binary or ternary metal oxides.…”

Section: Concept Structures and Properties Of Heosmentioning

confidence: 99%

High‐Entropy Oxides for Rechargeable Batteries

Ran,

Li,

Cheng

et al. 2024

Advanced Science

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High‐entropy oxides (HEOs) have garnered significant attention within the realm of rechargeable batteries owing to their distinctive advantages, which encompass diverse structural attributes, customizable compositions, entropy‐driven stabilization effects, and remarkable superionic conductivity. Despite the brilliance of HEOs in energy conversion and storage applications, there is still lacking a comprehensive review for both entry‐level and experienced researchers, which succinctly encapsulates the present status and the challenges inherent to HEOs, spanning structural features, intrinsic properties, prevalent synthetic methodologies, and diversified applications in rechargeable batteries. Within this review, the endeavor is to distill the structural characteristics, ionic conductivity, and entropy stabilization effects, explore the practical applications of HEOs in the realm of rechargeable batteries (lithium‐ion, sodium‐ion, and lithium‐sulfur batteries), including anode and cathode materials, electrolytes, and electrocatalysts. The review seeks to furnish an overview of the evolving landscape of HEOs‐based cell component materials, shedding light on the progress made and the hurdles encountered, as well as serving as the guidance for HEOs compositions design and optimization strategy to enhance the reversible structural stability, electrical properties, and electrochemical performance of rechargeable batteries in the realm of energy storage and conversion.

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“…Also, for the oxides family, several structural families were explored such as "rock salt" as the parent material, fluorites, 2 spinels, 3 perovskites, 4,5 ferrites, 6 and several others. 7,8 It is expected that this field will develop further since the number of compounds that can be obtained is virtually infinite. Although there is an explosion in the number of compounds that are reported to date, the study of their properties is still relatively scarce.…”

Section: Introductionmentioning

confidence: 99%

High-temperature transport properties of entropy-stabilized pyrochlores

Miruszewski,

Vayer,

Jaworski

et al. 2024

Journal of Applied Physics

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In this report, the high-temperature transport properties of (Dy1−xCax)(Zr0.2Hf0.2Sn0.2Ti0.2Ge0.2)O7 pyrochlore oxides with x = 0, 0.05, and 0.1 are studied in dry and humid air. The phase composition and crystal structure were determined by using x-ray and neutron diffraction. The addition of calcium to the structure caused an increase in the concentration of oxygen vacancies, indicating an ionic charge compensation mechanism. Electrical studies allowed us to determine the total electrical conductivity as a function of the synthesis atmosphere and pH2O. The electrical conductivity turned out to be at the level of ∼10−3 S/cm at 800 °C, and only a slight effect of the presence of protonic defects in the structure on the total electrical conductivity was observed. In general, the samples had a low electrical conductivity with a relatively high activation energy of conduction.

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Effect of processing route on the crystal structure and physical properties of bixbyite high-entropy oxides

Cited by 18 publications

References 54 publications

The emerging high-entropy strategy: a booster to the development of cathode materials for power batteries

The emerging high-entropy strategy: a booster to the development of cathode materials for power batteries

High‐Entropy Oxides for Rechargeable Batteries

High-temperature transport properties of entropy-stabilized pyrochlores

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