Conductive-Coated Vanadium Oxide Composite for Battery Capacity Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vanadium oxide-based battery materials face challenges in achieving high electron conductivity and capacity due to limitations in particle size and composition, which affect charge and discharge characteristics.
Innovation Solution
A vanadium oxide composite with a specific composition (Li3+x+aV1-xMxO4+a/2) coated with an electrically conductive material, having a controlled particle size of 0.5 µm to 5.0 µm, enhances electron conductivity and facilitates Li insertion/extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the particle size of vanadium oxide is increased to improve capacity, then the capacity increases, but the charge and discharge characteristics deteriorate
Solution Approach 1:
The vanadium oxide particles are divided into fine particles with a specific size range (0.5-5.0 µm) to optimize both capacity and charge/discharge characteristics. This segmentation allows sufficient surface area for rapid ion transport while maintaining adequate volume for high capacity.
2Quantity of substance
If the composition of vanadium oxide is modified to increase capacity, then the capacity improves, but the electron conductivity decreases
Solution Approach 1:
The patent uses composite vanadium oxide materials with specific compositional ranges (Li3+x+aV1-xMxO4+a/2 where M is a tetravalent metal element) to achieve high capacity while maintaining adequate electron conductivity through the synergistic effects of different elements.
Solution Approach 2:
The patent optimizes the compositional parameters (x and a values) of the vanadium oxide to balance capacity and conductivity. By carefully controlling the stoichiometry and doping levels, the material achieves high lithium insertion/extraction capacity while maintaining sufficient electron transport.
3Speed
If the particle size is reduced to improve charge and discharge characteristics, then the charge and discharge characteristics improve, but the capacity decreases
Solution Approach 1:
The patent identifies an optimal particle size range (0.5-5.0 µm) that balances the competing requirements of rapid charge/discharge and high capacity. This parameter optimization ensures sufficient surface area for fast ion transport while maintaining adequate volume for high lithium storage capacity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite improves battery capacity and charge/discharge characteristics by facilitating electron conduction and Li mobility, suitable for use in solid-state batteries.
Implementation Method 1
an electrically conductive material at least partially coating a surface of the particle
Implementation Method 2
facilitates Li insertion/extraction
Data Source
Figure 1~2
Figure 3~4
AI summary
A vanadium oxide composite of the present disclosure includes: a particle including a vanadium oxide represented by a composition formula (1) Li3+x+aV1-xMxO4+a/2; and an electrically conductive material at least partially coating a surface of the particle. In the composition formula (1), 0 < a < 1 and 0 ≤ x < 1 are satisfied, and M is at least one element selected from the group consisting of a tetravalent metal element and a tetravalent metalloid element. The vanadium oxide composite has an average particle size of 0.5 µm or more and 5.0 µm or less.