Battery Island Structure Angled Electrode Manufacturing
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Solution Overview
Problem
Current battery manufacturing processes are complex and do not efficiently produce batteries with desired electrochemical properties and high productivity, limiting miniaturization and output in lithium-ion secondary batteries.
Innovation Solution
A battery structure with a first active material layer having an island structure on a current collector, where the angle between the active material layer and the current collector is less than 90 degrees, and a method involving nozzle-scan coating to form stripe-shaped pattern elements, allowing for a smaller number of manufacturing steps and improved electrochemical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional battery manufacturing processes are used, then batteries can be produced with standard structure, but the manufacturing process is complex and productivity is limited
Solution Approach 1:
The active material layer is segmented into multiple island parts arranged on the current collector surface, creating a modular structure that simplifies manufacturing while improving electrochemical performance. The island structure allows for easier deposition and assembly processes compared to continuous layers.
Solution Approach 2:
The active material layer transitions from a traditional flat two-dimensional structure to a three-dimensional island structure with controlled angles less than 90 degrees. This dimensional change enables better electrolyte penetration and increased effective surface area without complicating the manufacturing process.
2Volume of moving object
If battery size is reduced for miniaturization, then device integration is improved, but electrochemical properties and output may deteriorate
Solution Approach 1:
The island structure creates local variations in the active material layer, with each island providing optimized local electrochemical environments. The angled configuration of islands less than 90 degrees to the current collector enhances local electrolyte access and ion transport, maintaining high electrochemical performance in compact batteries.
Solution Approach 2:
The island structure allows multiple active material regions to be nested within a compact footprint on the current collector surface. This nested arrangement maximizes the use of available space while maintaining sufficient electrochemical active area for high capacity and good charge-discharge characteristics.
Data Source
AI summary
A negative-electrode active material layer formed between a negative-electrode current collector and a solid electrolyte layer has a line-and-space structure in which a plurality of stripe-shaped pattern elements extending in a Y direction are arranged while being separated from each other. A gradient at each contact point where the stripe-shaped pattern element, the negative-electrode current collector and the solid electrolyte layer are in contact with each other is made smaller than 90°.