Lithium Vanadium Oxide Composition for Higher Battery Capacity
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Solution Overview
Problem
Existing battery technologies face limitations in improving charge and discharge characteristics and battery capacity, particularly in the use of vanadium oxide-based materials as negative electrode active materials.
Innovation Solution
A novel vanadium oxide composition represented by Li3+x+αV1-xMxO4+α/2 is introduced, where 0.03<α<1.0 and 0≤x<1.0, with M being tetravalent metal elements like Ti, enhancing intercalation and deintercalation of Li, thereby improving battery capacity and charge/discharge characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional vanadium oxide materials are used as negative electrode active materials, then the battery structure is simple, but the charge and discharge characteristics and battery capacity are limited
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition parameters of vanadium oxide, specifically setting the V:Li molar ratio between 1:2.9 and 1:3.1, and controlling the particle size distribution (D50: 3-10 μm, D90: 15-20 μm). These parameter optimizations enable significant improvement in battery capacity and charge/discharge characteristics without fundamentally changing the material system or battery structure.
2Productivity
If vanadium oxide composition is optimized to improve Li intercalation and deintercalation, then charge and discharge characteristics improve, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific parameter ranges for vanadium oxide composition (V:Li molar ratio 1:2.9-1:3.1) and particle size distribution (D50: 3-10 μm, D90: 15-20 μm) that optimize Li intercalation and deintercalation characteristics. These parameter specifications balance performance improvement with manufacturability by providing clear, achievable targets for production control.
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 novel vanadium oxide composition significantly enhances battery capacity and charge/discharge characteristics, facilitating better Li intercalation and deintercalation, leading to improved energy storage performance.
Implementation Method 1
enhancing intercalation and deintercalation of Li, thereby improving battery capacity and charge/discharge characteristics
Data Source
AI summary
A vanadium oxide of the present disclosure is represented by a composition formula (1): Li3+x+αV1-xMxO4+α2. In the composition formula (1), 0.03<α<1.0 and 0≤x<1.0 are satisfied, and M is at least one selected from the group consisting of tetravalent metal elements. A battery 1000 of the present disclosure includes a positive electrode 201, a negative electrode 203, and an electrolyte layer 202 disposed between the positive electrode 201 and the negative electrode 203. The negative electrode 203 includes the vanadium oxide of the present disclosure.