Volume 21, Issue 3 2407361
Research Article

High Entropy Oxide Duplex Yolk–Shell Structure with Isogenic Amorphous/Crystalline Heterophase as a Promising Anode Material for Lithium-Ion Batteries

Chunyan Zhang

Chunyan Zhang

State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 P. R. China

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Mengfei Su

Mengfei Su

State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 P. R. China

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Yana Luo

Yana Luo

Department of Materials Science and Engineering, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023 P. R. China

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Xinyu Zhang

Xinyu Zhang

State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 P. R. China

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Shengfa Li

Shengfa Li

State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 P. R. China

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Feng Gao

Corresponding Author

Feng Gao

Department of Materials Science and Engineering, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023 P. R. China

E-mail: [email protected]; [email protected]

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Qingyi Lu

Corresponding Author

Qingyi Lu

State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023 P. R. China

E-mail: [email protected]; [email protected]

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First published: 28 November 2024
Citations: 3

Abstract

Achieving composition and structure regulation on high entropy materials is a big challenge but will give this kind of new materials a huge boost in energy storage. Herein, a novel high entropy oxide ((CrMnFeCoNi)3O4) duplex yolk–shell structure (DYSHEO) with isogenic amorphous/crystalline heterophase are designed and successfully prepared through a simple microthermal solvothermal reaction followed by mesothermal calcination. The microthermal solvothermal reaction results in high entropy precursor with duplex yolk–shell structure, while the mesothermal calcination (annealing temperature at 450 °C) realizes the precursor transformation to (CrMnFeCoNi)3O4 (DYSHEO-450) with isogenic amorphous/crystalline heterophase structure. The high entropy effect, the duplex yolk–shell structure, and the isogenic amorphous/crystalline heterophase endow DYSHEO-450 great advantages as lithium-ion battery anode including reducing ion migration obstruction, accommodating volume expansion, and alleviating the stress. Accordingly, DYSHEO-450 exhibits high capacities of 1721 mAh g−1@0.5 A g−1, and 1356 mAh g−1@1 A g−1 after 500 cycles with a capacity retention rate of 90.3%. It also shows excellent performances in practical application as anode of a coin-type full cell. This work provides new ideas and directions for the structural regulation of high-entropy materials.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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