Composite Cathode Composition for Testable High-Capacity Batteries
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Solution Overview
Problem
Rechargeable batteries have lower capacity compared to primary batteries, and primary batteries cannot be tested before use as they deplete irreversibly, making it difficult to ensure reliability in battery applications.
Innovation Solution
A method of combining different cathode active materials, where a rechargeable material with high voltage and a high-capacity material with lower voltage are mixed, layered, or patterned to form a composite cathode, allowing for batteries to be tested repeatedly over a specific voltage range while maintaining high capacity under full discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rechargeable battery is used, then the battery can be tested repeatedly prior to deployment, but the capacity is lower compared to primary batteries
Solution Approach 1:
The patent combines a rechargeable cathode material (enabling testing) with a high-capacity primary battery material (enabling high capacity) into a single composite cathode. This merging allows the battery to simultaneously achieve both reliability through testing and high capacity, resolving the contradiction between these two features.
Solution Approach 2:
The invention uses a composite cathode material consisting of multiple distinct materials with different electrochemical properties. The rechargeable component allows for cycling and testing, while the high-capacity component provides superior energy density, thus achieving both reliability and high capacity through material composition.
2Quantity of substance
If a primary battery is used, then the battery provides high capacity, but it cannot be tested before use as it depletes irreversibly
Solution Approach 1:
The patent merges a high-capacity primary battery material with a rechargeable material in a composite cathode structure. This combination preserves the high capacity advantage of primary batteries while adding the ability to test through the rechargeable component, thus resolving the contradiction between capacity and testing capability.
3Quantity of substance
If a composite cathode with multiple materials is formed, then both rechargeability and high capacity are achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The composite cathode is formed by segmenting the manufacturing process into distinct steps: first forming a base cathode layer, then applying a separate rechargeable material layer. This segmentation allows each material to be optimized independently and simplifies the overall manufacturing process compared to creating a fully integrated composite material.
Solution Approach 2:
The patent introduces a vertical dimension to the cathode structure by layering materials at different heights or positions within the cathode assembly. This dimensional approach allows multiple materials to coexist without requiring complex horizontal mixing or integration, thereby reducing manufacturing complexity while maintaining the benefits of material combination.
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 cathode batteries provide high capacity and reliability, enabling testing before deployment and ensuring high energy density, with the rechargeable material being cycled without depleting the high-capacity material, thus addressing the limitations of conventional rechargeable batteries.
Implementation Method 1
a first cathode material of the inventive cathode is a rechargeable material
Implementation Method 2
The first and second cathode active materials may be combined in several fashions including mixing, layering and/or patterning
Data Source
AI summary
A method of preparing a composition for use as a cathode that combines two different cathode materials is disclosed. When utilized in a battery, one cathode material is rechargeable, and the second cathode material has a high capacity with a lower voltage than the first cathode material. The active materials may be combined in several fashions including mixing, layering, deposition, coating, and/or patterning. Such batteries can be tested repeatedly over a specific voltage range and provide high capacity under full discharge at deployment.