3D Battery Electrode With Staggered Support Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional secondary battery electrode structures face challenges in achieving high energy density, rate capability, and structural stability due to limitations in increasing the height and length of active material plates without causing bending or collapse, and irregular intervals between plates, which affects battery performance and lifespan.
Innovation Solution
A three-dimensional electrode structure is introduced, featuring a current collecting layer with vertically arranged active material plates and inner support layers positioned at different intervals, allowing for increased height and length of active material plates while maintaining structural stability, and incorporating a partition wall for additional support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the height and length of active material plates are increased to enhance energy density, then the capacity and energy density improve, but the plates bend or collapse due to structural instability
Solution Approach 1:
The patent transitions from a conventional two-dimensional electrode structure to a three-dimensional structure where active material plates are vertically arranged on the current collector. This dimensional change allows increasing the height of plates to enhance capacity while the vertical orientation combined with support layers prevents bending and collapse that would occur in flat configurations.
Solution Approach 2:
Inner support layers are introduced as intermediary elements positioned between adjacent active material plates. These support layers act as mediators that provide structural reinforcement to the plates, preventing them from bending or collapsing while allowing the plates to maintain increased height and length for higher energy density.
2Quantity of substance
If active material plates are arranged closely to increase energy density, then the active material volume fraction increases, but the intervals between plates become irregular affecting performance
Solution Approach 1:
Inner support layers serve as intermediary spacers positioned between adjacent active material plates. These support layers ensure uniform intervals are maintained between plates during assembly and operation, preventing irregular spacing that would compromise battery performance while allowing high active material volume fraction through close vertical arrangement.
Solution Approach 2:
The patent optimizes the thickness and positioning parameters of inner support layers to achieve the desired balance between plate interval uniformity and active material density. By carefully controlling these geometric parameters, the structure maintains precise spacing while maximizing the volume fraction of active material.
3Stability of the object's composition
If the number of support layers is increased to improve structural stability, then plate support improves, but the device complexity increases
Solution Approach 1:
Instead of uniformly distributing support layers throughout the entire electrode structure, the patent applies inner support layers selectively at specific locations between adjacent plates where structural reinforcement is most needed. This localized approach provides necessary stability while minimizing the total number of support layers and reducing overall device complexity.
Data Source
AI summary
A three-dimensional (“3D”) electrode structure includes a current collecting layer, a plurality of plates including an active material and disposed on the current collecting layer, and a plurality of inner support layers disposed between the plurality of plates. The plurality of plates includes first, second, and third plates. An inner support layer of the inner support layers is disposed between the first and second plates, and another inner support layer of the inner support layers is disposed between the second and third plates. The inner support layer between the first and second plates and the another inner support layer between the second and third plates are arranged at different positions in a lengthwise direction of the second plate.