Composite Lithium Battery Substrate for Copper-Polymer Adhesion
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Solution Overview
Problem
There is a need for improved adhesive strength between the metal layer and the support layer in rechargeable lithium batteries to enhance the performance and stability of these batteries.
Innovation Solution
A composite substrate for rechargeable lithium batteries is developed, comprising a support layer with a polymer film and metal layers that include copper or copper oxide, enhanced by an adhesion enhancer with a hydroxyalkylene group and amine group to stabilize copper ions, improving bonding through a chemical interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal layer is applied on a polymer film support layer, then electrical conductivity is provided, but adhesive strength between the metal layer and support layer is insufficient
Solution Approach 1:
An adhesion enhancer layer comprising copper and copper oxide is introduced as an intermediary between the polymer film support layer and the metal layer. This intermediate layer chemically bonds to the polymer film through functional groups (carboxyl, hydroxyl, or amine groups) while providing strong adhesion to the metal layer, thereby resolving the adhesive strength insufficiency without compromising stability
Solution Approach 2:
The support structure is designed as a composite material system consisting of the polymer film support layer, the adhesion enhancer layer with copper and copper oxide, and the metal layer. This composite structure combines the flexibility and support properties of the polymer film with the adhesive and conductive properties of the copper-based intermediate layer, achieving both strong adhesion and stability
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 substrate enhances adhesive strength and stability, leading to improved performance and reliability of rechargeable lithium batteries.
Implementation Method 1
a second moiety including an amine group configured to adsorb the first copper
Implementation Method 2
a second moiety including an amine group configured to adsorb the first copper
Implementation Method 3
impregnating the support layer with a second solution including a reducing agent to reduce the first copper ions
Data Source
AI summary
Examples of the disclosure include a composite substrate for a rechargeable lithium battery that includes a support layer including a polymer film, and a metal layer disposed on the support layer and including at least one of copper and copper oxide. The metal layer includes a first metal layer on a surface of the support layer and including an adhesion enhancer and a first copper, and a second metal layer on the first metal layer and including a second copper. The adhesion enhancer includes a first moiety chemically bonded to the surface of the support layer and including a hydroxyalkylene group, and a second moiety including an amine group configured to adsorb the first copper.