3D Electrode Structure with Partition Walls for Battery Stability
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Solution Overview
Problem
Current lithium secondary batteries face challenges in achieving high energy density and rate characteristics due to the collapse or deformation of active material plates with high aspect ratios, which affects their performance and lifespan.
Innovation Solution
A three-dimensional electrode structure is developed, featuring active material plates protruding from an electrode collector plate with perpendicular partition walls that provide structural support, maintaining the shape of the active material plates and allowing for uniform ion exchange, thereby enhancing energy density and battery stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If active material plates with high aspect ratio are used to increase energy density, then energy density is improved, but the active material plates collapse or deform affecting performance and lifespan
Solution Approach 1:
The electrode structure is divided into multiple segments: electrode collector plate, active material plates, and partition walls. This segmentation allows each component to perform its specific function - the partition walls provide structural support while the active material plates maintain their high aspect ratio for increased energy density without collapsing during charge/discharge cycles.
Solution Approach 2:
Different parts of the electrode structure have different properties optimized for their specific functions. The partition walls are designed with sufficient thickness and rigidity to provide structural support, while the active material plates are designed with high aspect ratio for energy density. This local optimization resolves the contradiction between energy density and reliability.
2Stability of the object's composition
If partition walls are added to maintain active material plate shape, then structural stability is improved, but device complexity increases
Solution Approach 1:
The partition walls serve multiple functions simultaneously: they provide structural support to prevent active material plate collapse, they maintain uniform intervals between plates for consistent ion exchange, and they contribute to the overall mechanical stability of the electrode. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity.
Solution Approach 2:
The partition walls are integrated into the electrode structure as an inherent component rather than an external addition. They are positioned between the active material plates and form a unified structure that works together during battery operation. This integration minimizes the increase in device complexity by combining support and spacing functions into a single structural element.
Data Source
AI summary
A three-dimensional (“3D”) electrode structure includes an electrode collector plate, a plurality of active material plates disposed on the electrode collector plate and protruding from the electrode collector plate, and partition walls arranged on the electrode collector plate and substantially perpendicular to the plurality of active material plates in a plan view so as to provide structural stability of the plurality of first active material plates where the 3D electrode structure may be one of two electrode structures that are spaced apart from each other with an electrolyte layer therebetween.