Battery Current Collector Metal Mesh Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium rechargeable batteries face efficiency deterioration due to active materials being deintercalated from current collectors during repeated charging and discharging cycles.
Innovation Solution
A current collector with a base material and metal mesh layers having adhesive layers, where the metal mesh layers include patterns and holes, enhancing the contact area with active materials and improving adhesion, thereby preventing deintercalation and extending cycle lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active materials are coated on conventional current collectors, then battery capacity is achieved, but active materials are deintercalated during repeated charging and discharging cycles
Solution Approach 1:
The current collector uses a composite structure combining a base material layer with a metal mesh layer featuring patterns and holes. This composite design provides both mechanical support and enhanced adhesion properties, preventing active material deintercalation while maintaining battery capacity over extended cycle lifespans
Solution Approach 2:
The metal mesh layer incorporates localized patterns with varying hole distributions and mesh densities in different regions. This local quality variation optimizes adhesion strength where active materials are coated while maintaining overall structural integrity, effectively preventing deintercalation during charge-discharge cycles
2Reliability
If metal mesh layers with patterns and holes are added to the current collector, then contact area with active material is increased and adhesion is improved, but device complexity increases
Solution Approach 1:
The current collector is segmented into distinct functional layers: a base material layer providing mechanical support and a metal mesh layer with patterns and holes providing adhesion enhancement. This segmentation allows each layer to be optimized independently while working together to prevent active material deintercalation
Solution Approach 2:
The metal mesh layer incorporates a porous structure with controlled hole patterns that increase the surface area and contact points with active materials. This porous design enhances adhesion strength without significantly increasing overall device complexity, as the holes are integrated into the mesh pattern itself
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 solution effectively restricts active material deintercalation, enhancing battery efficiency and cycle lifespan by increasing contact areas and improving adhesion between the active material and the current collector.
Implementation Method 1
adhesive layers positioned on the base material... positioning and compressing the metal mesh layers onto the adhesive layers
Data Source
AI summary
Provided are a current collector for a battery, including: a base material; adhesive layers positioned on the base material; and metal mesh layers positioned on the adhesive layers, in which the metal mesh layer includes a plurality of metal mesh patterns, and holes positioned between the metal mesh patterns, and a method of manufacturing the same. An active material is applied onto the metal mesh layer through the holes of the metal mesh layer, and thus a contact area of the metal mesh layer and the active material is increased, so that it is possible to restrict the active material from being deintercalated from the current collector and improve a cycle lifespan property of a battery.