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High Entropy Oxides Modulate Atomic-Level Interactions for High-Performance Aqueous Zinc-Ion Batteries
Kai Du1, Yujie Liu1, Yunfei Yang1
1Key Laboratory of Advanced Functional Materials of Education Ministry of China, Faculty of Engineering and Manufacturing, Beijing University of Technology, Beijing, 100124, China.
Advanced Materials (Deerfield Beach, Fla.)
|October 25, 2023
Summary
High-entropy oxides (HEOs) offer a novel cathode material for aqueous zinc-ion batteries (AZIBs). These materials enhance electron transfer and structural stability, overcoming limitations of traditional cathodes for improved battery performance.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Traditional oxide cathodes in aqueous zinc-ion batteries (AZIBs) face performance limitations due to strong electrostatic interactions between zinc ions and cathode structures.
- Delayed charge compensation in conventional materials further hinders efficient electron transfer and overall battery performance.
Purpose of the Study:
- To introduce a new class of high-entropy oxides (HEOs) as advanced cathode materials for AZIBs.
- To enhance electron transfer efficiency and improve lattice tolerance in AZIB cathodes.
- To overcome the limitations of traditional oxide cathodes for high-performance energy storage.
Main Methods:
- Development and characterization of novel high-entropy oxides (HEOs) for AZIB cathodes.
- Investigation of the "cock-tail" effect of diverse metal atoms in HEOs on electronic structure.
- Evaluation of electrochemical performance, including rate capability and cycling stability.
Main Results:
- HEOs exhibit multipath electron transfer and remarkable structural stability, promoting efficient charge compensation.
- The unique composition of HEOs broadens the d-band and lowers degeneracy, facilitating convenient electron transfer.
- Achieved excellent rate performance (136.2 mAh g-1 at 10.0 A g-1) and outstanding cycling stability due to lattice strain tolerance.
Conclusions:
- High-entropy oxides represent a promising cathode material for high-performance aqueous zinc-ion batteries.
- The inherent properties of HEOs, including enhanced electron transfer and structural stability, address key challenges in AZIB technology.
- The element selectivity in HEOs offers significant potential for future AZIB development.
Keywords:
aqueous zinc-ion batterieshigh charge densityhigh entropyhigh rate performancemodulated d-bandMore Related Videos
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