Innovative Positive Electrode Design for Stable Battery Performance
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Summary
Problems
Existing techniques for producing positive active material composite particles for battery electrodes face challenges due to the positive active material's inability to soften like the binder resin, making it difficult to form suitable composite particles for the positive active material mixture layer.
Innovation solutions
The development of positive active material composite particles comprising a positive active material particle, a conductive particle with a smaller diameter, and a binder resin that bonds the conductive particle to the surface of the positive active material particle, ensuring stability during deposition processes.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the technique of Patent Document 1 is applied to produce positive active material composite particles, then composite particles can be formed through heating, but the positive active material cannot soften like binder resin, making it impossible to obtain suitable composite particles
Why choose this principle:
The composite particle is segmented into distinct functional components: positive active material particles (core), conductive particles (sub-particles), and binder resin (matrix). This segmentation allows each component to perform its specific function while maintaining overall particle integrity during deposition processes.
Principle concept:
If the technique of Patent Document 1 is applied to produce positive active material composite particles, then composite particles can be formed through heating, but the positive active material cannot soften like binder resin, making it impossible to obtain suitable composite particles
Why choose this principle:
The binder resin acts as an intermediary substance that bonds the positive active material particles and conductive particles together. This mediator enables the formation of stable composite particles without requiring the positive active material itself to soften, resolving the contradiction between manufacturability and suitability.
Application Domain
Data Source
AI summary:
The development of positive active material composite particles comprising a positive active material particle, a conductive particle with a smaller diameter, and a binder resin that bonds the conductive particle to the surface of the positive active material particle, ensuring stability during deposition processes.
Abstract
A positive active material composite particle (1) of the present disclosure includes a positive active material particle (2), a conductive particle (3) existing on a surface of the positive active material particle (2) and having a smaller diameter than the positive active material particle (2), and a binder resin (4) bonding the surface of the positive active material particle (2) and the conductive particle (3) on the surface of the positive active material particle (2). A positive electrode sheet (10) of the present disclosure includes a positive active material mixture layer (9) formed on a current collecting member (8) by a dry process using the positive active material composite particle (1).