Gel-State Polymer Electrode Plate for Battery Liquid Retention
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Solution Overview
Problem
Current electrode plates in battery cells exhibit poor liquid storage capability due to the poor affinity between active materials and electrolytic solutions, leading to deteriorated cycle performance.
Innovation Solution
A polymer is formulated by adding it to a solvent at a specific temperature, allowing the polymer system to stand for a defined period, and then filtering it through a mesh screen to create a gel-state material, enhancing the affinity between polymer molecular chains and the electrolytic solution, thereby improving liquid storage and infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current active material is used in electrode plates, then battery cell capacity is maintained, but liquid storage capability deteriorates leading to poor cycle performance
Solution Approach 1:
The patent introduces a polymer as an intermediary substance between the active material and electrolytic solution. This polymer forms a gel-state material that mediates the interaction between these components, improving liquid storage capability while maintaining good affinity with both the active material and electrolyte, thereby resolving the contradiction between maintaining capacity and improving cycle performance through enhanced liquid retention.
Solution Approach 2:
The patent creates a composite structure by combining polymer with active material to form a modified electrode plate. This composite material integrates the benefits of both components: the active material provides electrochemical functionality while the polymer component enhances liquid storage capability and affinity with electrolytic solution, thus improving cycle performance without sacrificing capacity.
2Reliability
If polymer is added to improve liquid storage, then cycle performance improves, but device complexity increases due to additional processing steps
Solution Approach 1:
The patent merges the polymer addition step with the existing electrode plate manufacturing process. The polymer is incorporated during the slurry preparation stage, combining multiple functions (binder, liquid storage enhancer, affinity promoter) into a single material component, thereby improving cycle performance without significantly increasing processing complexity.
Solution Approach 2:
The patent optimizes specific parameters of the polymer (molecular weight, composition ratio, gel-state characteristics) to achieve the desired balance between liquid storage capability and processing ease. By carefully controlling these parameters, the patent improves cycle performance while keeping the processing steps within acceptable complexity limits.
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 polymer enhances the cycle performance and storage performance of battery cells by promoting the binding of electrolytic solution with active materials, ensuring better liquid storage and rapid migration of ions.
Implementation Method 1
adding the polymer to a first solvent at a first temperature to form a polymer system, allowing the polymer system to stand for 8 hours at the first temperature and for >24 hours at a second temperature; and then filtering the polymer system through a 200-mesh screen, to obtain remains on the screen as the first substance
Implementation Method 2
allowing the polymer system to stand for 8 hours at the first temperature and for >24 hours at a second temperature
Implementation Method 3
promotes the mutual attraction and physical binding between the polymer molecular chains and the solvent in an electrolytic solution
Implementation Method 4
promotes the mutual attraction and physical binding between the polymer molecular chains and the solvent in an electrolytic solution
Implementation Method 5
allows the polymer to maintain attachment on the surface of the active material and to lock the electrolytic solution in a space environment where the polymer is located
Implementation Method 6
ensuring better liquid storage and rapid migration of ions
Data Source
AI summary
A polymer satisfies: 5≤m/n≤1000, in which n represents a mass of the polymer, in grams, and m represents a mass, in grams, of a first substance that is obtained adding the polymer to a first solvent at a first temperature to form a polymer system, allowing the polymer system to stand for 8 hours at the first temperature and for ≥24 hours at a second temperature; and then filtering the polymer system through a 200-mesh screen, to obtain remains on the screen as the first substance and wherein the first temperature is higher than the second temperature.