Negative Electrode Pore Distribution for Battery Penetrability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Non-aqueous electrolyte batteries face challenges in achieving optimal penetrability and output characteristics due to limitations in pore diameter distribution within the negative electrode layer, which affects the impregnation of the non-aqueous electrolyte solution and overall battery performance.
Innovation Solution
A non-aqueous electrolyte battery design featuring a negative electrode with a porous layer having specific pore diameter peaks at 0.04 to 0.15 μm and 0.8 to 6 μm, achieved through the mercury press-in method, utilizing lithium compounds and a structured slurry with controlled grain size distribution, and a current collector with a small average crystal particle diameter to enhance electrode density and prevent corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pore diameter distribution in the negative electrode layer is not optimized, then the manufacturing process is simpler, but the penetrability of the non-aqueous electrolyte solution and output characteristics are insufficient
Solution Approach 1:
The patent applies porous materials principle by carefully controlling the pore diameter distribution of the negative electrode layer to create an optimized porous structure. The pore diameter is controlled to be 0.03 μm or more and 0.2 μm or less, with specific distribution characteristics (first peak at 0.04-0.15 μm, second peak at 0.8-6 μm) to enhance electrolyte penetrability while maintaining structural integrity and performance.
Solution Approach 2:
The patent applies parameter changes principle by precisely controlling the pore diameter parameter of the negative electrode layer. The pore diameter is optimized within the range of 0.03-0.2 μm with specific peak distributions, and this parameter control directly improves the penetrability of the non-aqueous electrolyte solution and the output characteristics of the battery.
2Reliability
If the pore diameter is increased to improve electrolyte impregnation, then the penetrability improves, but the electrode density and structural integrity deteriorate
Solution Approach 1:
The patent applies porous materials principle by creating a controlled porous structure in the negative electrode layer with specific pore diameter ranges (0.03-0.2 μm) and distribution characteristics. This optimized porous structure allows sufficient electrolyte impregnation while maintaining the structural integrity and density of the electrode layer, resolving the contradiction between penetrability and structural stability.
Solution Approach 2:
The patent applies local quality principle by creating different pore diameter regions within the negative electrode layer. The pore diameter distribution includes a first peak at 0.04-0.15 μm and a second peak at 0.8-6 μm, creating local variations in pore size that optimize both electrolyte access and structural maintenance in different regions of the electrode.
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 battery exhibits improved output characteristics and cycle performance with enhanced penetrability of the non-aqueous electrolyte solution, leading to increased capacity and reduced impedance, particularly during rapid charging and discharge cycles.
Implementation Method 1
the porous negative electrode layer has a first peak at a pore diameter of 0.04 to 0.15 μm and a second peak at a pore diameter of 0.8 to 6 μm in the relation between the pore diameter and log differential intrusion obtained in the mercury press-in method
Data Source
AI summary
A non-aqueous electrolyte battery includes an electrode group includes a positive electrode and a negative electrode disposed through a separator, and a non-aqueous electrolyte. The negative electrode comprises a current collector and a porous negative electrode layer formed on the current collector and containing a lithium compound. The porous negative electrode layer has a first peak at a pore diameter of 0.04 to 0.15 μm and a second peak at a pore diameter of 0.8 to 6 μm in the relation between the pore diameter and log differential intrusion obtained in the mercury press-in method.