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Na Ions Doped Fe2VO4 Cathode for High Performance Aqueous Zinc-ion Batteries
Yin-Qiang Hu1, Li Lin2, Zhen-Yu Hu2
1State Key Lab High Power Semicond Laser, Changchun University of Science and Technology, Changchun, 130022, China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 28, 2024
Summary
Sodium intercalation into Fe2VO4 enhances cathode performance for aqueous zinc ion batteries. This strategy improves active sites and structural stability, offering a promising alternative to lithium-ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Aqueous zinc ion batteries (AZIBs) offer a safer, cost-effective alternative to lithium-ion batteries.
- High-capacity AZIB cathodes require abundant active sites and stable crystal structures.
Purpose of the Study:
- To enhance the electrochemical performance of Fe2VO4 (FVO) as a cathode material for AZIBs.
- To investigate the effect of Na+ intercalation on the structure and properties of FVO.
Main Methods:
- Proposed Na+ intercalation strategy for Fe2VO4.
- Electrochemical performance testing, including specific capacity and cycling stability at various current densities.
Main Results:
- Na+ intercalation enriches active sites and stabilizes the lamellar structure of FVO through electrostatic attraction.
- Achieved a discharge specific capacity of 370 mAh g-1 at 0.1 A g-1.
- Demonstrated excellent cycling stability with 200 mAh g-1 at 5 A g-1 after 2000 cycles and 99% capacity retention.
Conclusions:
- The FVO-Na material exhibits superior electrochemical performance compared to pristine FVO.
- FVO-Na is identified as an ideal cathode material for advanced aqueous zinc ion batteries.
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