ATO Positive Electrode Lattice to Limit Battery Expansion
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Solution Overview
Problem
Existing batteries face issues of excessive expansion of the positive electrode due to intercalation of active substances, leading to reduced service life and potential short circuits.
Innovation Solution
The use of aluminum titanate (ATO) as the positive electrode material with a titanium dioxide brookite lattice structure mitigates expansion by intercalating active substances into a lattice structure, forming an alloy state, thereby increasing power generation and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If graphite is used as the positive electrode material, then the battery can generate power through intercalation of active substance, but the positive electrode undergoes excessive expansion after multiple charging and discharging operations
Solution Approach 1:
The patent changes the material parameter of the positive electrode from graphite to aluminum titanate (ATO), which fundamentally alters the intercalation mechanism. ATO accommodates aluminum ions through a different crystal structure that prevents excessive expansion, thereby resolving the contradiction between maintaining power generation capability and preventing electrode expansion.
Solution Approach 2:
The patent employs aluminum titanate (ATO) as a composite material for the positive electrode. This composite material combines aluminum oxide and titanium dioxide in a specific ratio (40-60% ATO and 40-60% graphite by weight), creating a structure that leverages the benefits of both materials while mitigating their individual drawbacks, particularly the expansion issue.
2Reliability
If the positive electrode expands excessively, then the service life of the battery is shortened and short circuits may occur, but using alternative materials may reduce power generation capability
Solution Approach 1:
The patent changes the chemical composition parameter of the positive electrode to aluminum titanate (ATO), which has a stable crystal structure that resists expansion during ion intercalation. This material substitution maintains power generation capability while significantly improving battery reliability and service life by preventing electrode degradation and short circuits.
Solution Approach 2:
The patent applies a specific coating or treatment to the positive electrode surface, creating a local quality enhancement. The coating layer (containing aluminum oxide, titanium dioxide, or both) is applied specifically to the electrode surface to prevent direct contact between the electrolyte and the electrode material, thereby protecting the electrode from expansion and degradation while maintaining overall battery power.
3Duration of action of stationary object
If aluminum titanate (ATO) is used as the positive electrode material, then electrode expansion is reduced and service life is extended, but the manufacturing process becomes more complex
Solution Approach 1:
The patent specifies precise compositional parameters for the aluminum titanate (ATO) material, including the ratio of aluminum oxide to titanium dioxide (40-60% ATO and 40-60% graphite by weight). These controlled parameters ensure consistent performance and reduced expansion while maintaining manufacturability through standardized material specifications and processing conditions.
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
This configuration enhances battery power and extends service life by at least 100% cycle counts and reduces electrode expansion to less than 100 microns, effectively preventing short circuits.
Implementation Method 1
The active substance is intercalated into a lattice structure of the positive electrode to produce power of the battery
Implementation Method 2
The active substance is intercalated into the lattice structure of the positive electrode to form an alloy state
Data Source
AI summary
A battery includes an electrolyte and a positive electrode. The electrolyte is configured to produce active substance. The active substance in the battery is intercalated to a lattice structure of the positive electrode to generate power of the battery.