Solid-State Battery Asymmetric Electrode Angles
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Solution Overview
Problem
Current lithium-ion batteries face challenges with flammability, low ion conductivity, and reduced volume energy density due to the use of organic electrolytes, and existing solid-state battery structures do not effectively optimize the shape and size of electrode layers to prevent shorting and enhance energy density.
Innovation Solution
A solid-state battery design featuring a laminate structure with specific angle configurations (α>90°, β>90°, and α>β) for the electrode layers and collector layers, combined with a laser cutting method to minimize non-functional regions and optimize the shape and size, ensuring high volume energy density and reduced shorting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electrode layers are made larger to increase energy density, then volume energy density improves, but the risk of shorting between layers increases
Solution Approach 1:
The patent applies asymmetry by configuring the electrode layers with different angular orientations (α and β angles) relative to the collector layers. The first electrode layer has a different angular configuration than the second electrode layer, creating an asymmetric laminate structure that optimizes both space utilization and electrical isolation. This asymmetric design allows the electrode layers to be positioned at optimal angles that maximize energy density while maintaining sufficient separation to prevent shorting.
Solution Approach 2:
The patent transitions from a conventional planar arrangement to a three-dimensional angular configuration by defining specific angles (α>90°, β>90°, and α>β) for the electrode layers relative to the collector layers. This dimensional change allows the electrode layers to be oriented in multiple directions within the laminate, effectively utilizing available space while creating natural separation zones that prevent shorting between adjacent layers.
2Quantity of substance
If non-functional regions are reduced to increase energy density, then volume energy density improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise angular parameters (α>90°, β>90°, and α>β) for the electrode layer configurations. By defining these specific parameter ranges, the invention transforms the manufacturing challenge into a controlled parameter optimization problem. The specified angular relationships provide clear manufacturing targets that balance maximizing energy density with achieving feasible manufacturing precision.
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 proposed design achieves a higher volume energy density and improved reliability by minimizing non-functional regions and preventing shorting between electrode layers, enhancing the battery's performance and manufacturing efficiency.
Implementation Method 1
a laser cutting step of cutting the laminated structure into a predetermined size and shape using a laser beam
Data Source
AI summary
Provided herein is a solid-state battery having high volume energy density, as well as a method of manufacture of such a solid-state battery. A solid-state battery 100 is a laminate including a first collector layer 1, a positive electrode layer 2, a solid electrolyte layer 5, a negative electrode layer 4, and a second collector layer 3, in this order from the top. The solid-state battery 100 satisfies α>90°, β>90°, and α>β, where α is the angle formed in the positive electrode layer 2 by a side surface 2A of the positive electrode layer 2 and the top surface of the solid electrolyte layer 5 underlying the positive electrode layer 2, and β is the angle formed in the negative electrode layer 4 by a side surface 4A of the negative electrode layer 4 and the top surface of the second collector layer 3 underlying the negative electrode layer 4.