Through-Hole Electrode Structure for High-Loading Lithium Batteries
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Solution Overview
Problem
Lithium batteries face performance degradation due to non-uniform distribution of constituent components and increased density near the electrode surface, which affects flexibility and high loading capacity.
Innovation Solution
Incorporating a novel electrode design with through-holes in the electrode active material layer and positioning the electrode current collector selectively, allowing for a uniform distribution of components and reducing the volume occupied by the current collector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high loading capacity is increased to achieve higher energy density, then energy density is improved, but component distribution becomes non-uniform and surface density increases leading to performance degradation
Solution Approach 1:
The electrode active material layer is designed with a porous structure containing multiple through-holes that extend from one surface to the opposite surface. This porous configuration enables uniform distribution of electrolyte and active materials throughout the electrode thickness, preventing surface density accumulation and maintaining consistent electrochemical performance even at high loading capacities
Solution Approach 2:
The invention transitions from a traditional planar electrode structure to a three-dimensional porous structure with through-holes penetrating the entire thickness. This dimensional transformation creates internal pathways that facilitate uniform component distribution and improves ion transport efficiency throughout the electrode volume
2Use of energy by moving object
If electrode density near surface is increased to improve loading capacity, then energy density is improved, but flexibility is reduced
Solution Approach 1:
The porous structure with through-holes creates an open framework that reduces material density while maintaining high loading capacity through efficient space utilization. This porous architecture inherently provides flexibility by allowing the electrode to deform without structural failure
Solution Approach 2:
The electrode employs a composite structure combining active material, binder, and conductive material in a porous matrix. This composite design achieves high loading capacity through optimized material distribution while the porous framework maintains flexibility and mechanical integrity
3Use of energy by moving object
If high loading capacity is used to increase energy density, then energy density is improved, but internal resistance increases reducing high-rate capability
Solution Approach 1:
The through-holes create direct ion transport pathways from one electrode surface to the other, significantly reducing ion transport distance and resistance. This porous structure enables efficient electrolyte penetration and maintains low internal resistance even at high loading capacities, thereby preserving high-rate capability
Solution Approach 2:
By creating three-dimensional through-holes penetrating the electrode thickness, the invention establishes multiple ion transport dimensions that reduce reliance on surface-only pathways. This dimensional expansion shortens ion diffusion paths and reduces internal resistance
Data Source
AI summary
An electrode, a lithium battery including the same, and a method of preparing the electrode are provided. The electrode includes an electrode active material layer including an electrode active material and a binder; and an electrode current collector at a portion of the electrode active material layer and at one side of the electrode active material layer, or at a portion of the electrode active material layer between opposing sides of the electrode active material layer, wherein the electrode active material layer includes a plurality of through-holes.