Ester-Polymer Electrode Plate for Faster Electrolyte Absorption
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Solution Overview
Problem
The active material in current electrode plates has poor electrolyte absorption performance, leading to poor cycling performance of battery cells.
Innovation Solution
An electrode plate is developed with a current collector and an active material layer that includes an active material and an ester polymer, optimized to improve electrolyte absorption rates through uniform high-infiltration points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional active material is used in the electrode plate, then the manufacturing process is simple, but the electrolyte absorption performance is poor
Solution Approach 1:
The patent applies composite materials by combining conventional active material with ester polymer to create a composite active material layer. This composite structure enables the layer to simultaneously achieve good electrolyte absorption performance through the ester polymer's capillary action while maintaining the electrochemical functionality of the active material, thus resolving the contradiction between simple manufacturing and poor electrolyte absorption.
Solution Approach 2:
The ester polymer introduces porous structures that enhance electrolyte absorption through capillary action. The porous network formed by the ester polymer creates multiple infiltration channels for electrolyte penetration, significantly improving the electrolyte absorption performance without complicating the overall manufacturing process.
2Reliability
If active material with poor electrolyte absorption is used, then the electrode plate structure is simple, but the cycling performance is poor
Solution Approach 1:
By creating a composite active material layer containing both active material and ester polymer, the patent improves cycling performance through enhanced electrolyte absorption and distribution. The ester polymer component provides a stable matrix that facilitates consistent electrolyte access to active material particles over multiple cycles, while the composite structure remains manageable in complexity.
Solution Approach 2:
The patent changes the physical and chemical parameters of the active material layer by incorporating ester polymer, which modifies the layer's porosity, surface area, and capillary properties. These parameter changes enable better electrolyte penetration and distribution, directly improving cycling performance without requiring complete redesign of the electrode plate structure.
3Productivity
If uniform high-infiltration points are formed in the active material layer, then the electrolyte absorption rate increases, but the manufacturing precision requirement increases
Solution Approach 1:
The ester polymer creates local high-infiltration regions within the active material layer, concentrating the electrolyte absorption function in specific areas rather than requiring uniform distribution throughout. This local quality approach enables high electrolyte absorption rates while being more tolerant of manufacturing variations, as the ester polymer's self-organizing capability forms functional infiltration points even with moderate manufacturing precision.
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 introduction of the ester polymer enhances the electrolyte absorption rate of the active material layer, thereby improving the cycling performance of the battery cell.
Implementation Method 1
the ester polymer of this application is introduced during preparation of the active material layer, and can form uniform high-infiltration points within the active material layer, which equably improves the infiltration performance of the active material layer, thereby increasing the overall electrolyte absorption rate of the active material layer
Data Source
AI summary
An electrode plate and a related battery cell, battery, and electric apparatus. The electrode plate includes a current collector and an active material layer arranged on at least one surface of the current collector. The active material layer includes an active material and an ester polymer. The active material layer meets formula (1) to formula (3).λ=1-P1P2formula (1)v=π×(d2)2×h×ρtformula (2)v/λ>1.formula (3)