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Fabrication of VB2/Air Cells for Electrochemical Testing
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Quasi-Solid-State All-V2O5 Battery.

Guolong Wang1, Xiaoqian Cui1, Zhuofan Yang1

  • 1State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|December 22, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a high-performance quasi-solid-state vanadium oxide (V2O5) battery using advanced electrodes and a solid polymer electrolyte (SPE). The novel design offers improved capacity and stability for next-generation energy storage.

Keywords:
V2O5charge transport kineticsgraphenesolid electrolytesymmetrical battery

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state symmetrical batteries offer a promising future but face challenges with high-performance bipolar electrodes and solid electrolytes.
  • Developing compatible electrode and electrolyte materials is crucial for advancing solid-state battery technology.

Purpose of the Study:

  • To develop a high-performance quasi-solid-state all-vanadium oxide (V2O5) battery.
  • To address limitations in bipolar electrode performance and solid electrolyte compatibility.
  • To demonstrate the feasibility and advantages of a symmetrical V2O5 battery configuration.

Main Methods:

  • Fabrication of binder-free carbon fabric-V2O5 nanowires@graphene (CVOG) bipolar electrodes.
  • Development of a softly cross-linked polyethylene oxide-based solid polymer electrolyte (SPE).
  • Electrochemical analysis to decouple cathodic and anodic reactions and assess battery performance.

Main Results:

  • The CVOG electrode exhibited enhanced kinetics and suppressed vanadium dissolution due to nano-structuring and graphene wrapping.
  • The SPE demonstrated high ionic conductivity, excellent electrolyte-electrode contact, and a low charge-transfer barrier.
  • The solid-state full battery achieved a reversible capacity of 158 mAh g-1 at 0.1 C, with 61% capacity retention from 0.1 C to 2 C and 77% after 1000 cycles at 1 C.

Conclusions:

  • The developed quasi-solid-state all-V2O5 battery surpasses existing solid-state symmetrical batteries in performance.
  • This work provides a practical approach for high-performance solid-state batteries with symmetrical configurations.
  • The findings contribute to the advancement of next-generation battery technologies.