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Updated: Jun 11, 2025
09:04
Fabrication of VB2/Air Cells for Electrochemical Testing
Published on: August 5, 2013
11.9K
High-Energy-Density All-V2O5 Battery.
Guolong Wang1, Jingqi Wang1, Jiale Song1
1State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, Shaanxi, 710049, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|October 4, 2024
Summary
This study introduces a high-voltage vanadium oxide (V2O5) symmetrical battery. This novel design achieves high energy density and stability, outperforming current lithium, sodium, and potassium-based symmetrical batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Symmetrical batteries offer cost-effectiveness and safety but are limited by low energy density.
- Integrating high specific capacity with high voltage is challenging due to limited bipolar electrode choices.
Purpose of the Study:
- To conceptualize a high-voltage all-vanadium pentoxide (V2O5) symmetrical battery with a clear voltage plateau.
- To decouple cathodic and anodic redox reactions using V2O5 intercalation chemistry.
Main Methods:
- Fabrication of a hierarchical V2O5-carbon composite (VO-C) bipolar electrode.
- Demonstration of VO-C as both a high-performance cathode and anode in a symmetrical full-battery configuration.
Main Results:
- The symmetrical full-battery achieved a high capacity of 174 mAh g⁻¹ with a peak voltage above 2.9 V at 0.5C.
- Remarkable capacity retention of 81% from 0.5C to 10C and 70% after 300 cycles at 5C.
- Energy density reached 429 Wh kg⁻¹, surpassing existing Li/Na/K-based symmetrical batteries.
Conclusions:
- The developed V2O5-based symmetrical battery significantly advances performance.
- This work provides a new design strategy for future high-performance battery technologies.
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