Composite Battery Substrate With Copper Adhesion Enhancer
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Solution Overview
Problem
Existing rechargeable lithium batteries face challenges in achieving high adhesive strength between the metal layer and the support layer, which affects the stability and performance of the battery.
Innovation Solution
A composite substrate is developed with a support layer and metal layers that include a polymer film and copper-based components, enhanced by an adhesion enhancer with hydroxyalkylene and amine groups to improve bonding, and a method involving surface modification and impregnation of copper ions to form stable metal layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal layer is formed on a support layer in conventional rechargeable lithium batteries, then electrical conductivity is achieved, but adhesive strength between the metal layer and support layer is insufficient
Solution Approach 1:
An adhesion enhancer layer comprising organic-inorganic hybrid particles is introduced between the metal layer and the support layer. These particles have a dual nature: the inorganic component (such as silane) forms chemical bonds with the metal layer, while the organic component (such as polymer) bonds with the support layer, thereby serving as an effective intermediary that significantly improves adhesive strength and overall stability
Solution Approach 2:
The adhesion enhancer utilizes organic-inorganic hybrid particles that combine the advantages of both organic and inorganic materials. The inorganic portion provides strong chemical bonding capability with the metal layer, while the organic portion ensures good compatibility and bonding with the polymer support layer, creating a composite structure that resolves the adhesion problem
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, leading to improved stability and performance of rechargeable lithium batteries.
Implementation Method 1
the adhesion enhancer may include 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
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
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AI summary
Provided is 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 any one of copper, copper oxide, or a combination thereof, wherein the metal layer includes a first metal layer disposed on a surface of the support layer and including an adhesion enhancer and a first copper, and a second metal layer disposed on the first metal layer and including a second copper, and 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.