All-Solid-State Battery Electrode Conductive Network for Higher Output
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Solution Overview
Problem
Existing all-solid-state batteries face challenges in achieving high output characteristics and capacity, particularly as they are expected to expand into new applications requiring improved performance.
Innovation Solution
The all-solid-state battery electrode is designed with a specific configuration of conductive assistant particles, where the aspect ratio A is 1.5 or more, and the inter-particle distance L satisfies the relationship L ≤ b, forming a favorable conductive network to enhance electron conductivity and increase the utilization rate of electrode active material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional non-aqueous electrolyte secondary batteries are used with standard conductive material configurations, then the battery structure is simple and easy to manufacture, but the output characteristics are insufficient for high-demand applications
Solution Approach 1:
The patent applies local quality by specifying that conductive assistant particles with an aspect ratio of 1.5 or more be distributed throughout the electrode mixture. This creates localized conductive pathways with optimized geometry in specific regions of the electrode, enhancing electron conductivity where needed without requiring complete structural redesign of the entire battery system.
Solution Approach 2:
The patent employs parameter changes by defining specific geometric parameters for conductive assistant particles (aspect ratio ≥1.5) and their spatial arrangement (inter-particle distance relationship). By controlling these parameters, the electrode achieves improved output characteristics while maintaining a manufacturable structure through quantitative design rather than qualitative complexity.
2Reliability
If the aspect ratio of conductive assistant particles is increased to 1.5 or more, then electron conductivity and utilization rate of electrode active material improve, but the manufacturing precision requirements increase
Solution Approach 1:
The patent addresses manufacturing precision challenges by establishing clear parameter thresholds (aspect ratio ≥1.5, specific inter-particle distance relationships) that can be controlled during production. These quantitative parameters provide measurable targets for quality control, enabling consistent achievement of improved electron conductivity through controlled particle selection and distribution processes.
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
This configuration results in an all-solid-state battery with large capacity and excellent output characteristics, as demonstrated by improved discharge capacity and retention rates.
Implementation Method 1
forming a favorable conductive network to enhance electron conductivity
Data Source
AI summary
An all-solid-state battery electrode of the present invention includes: a molded body formed from an electrode mixture that contains at least an electrode active material, a solid electrolyte, and conductive assistant particles. The conductive assistant particles have an aspect ratio A determined by observing a cross section of the molded body of the electrode mixture of 1.5 or more, and an inter-particle distance L (μm) of the conductive assistant particles in a three-dimensional space and a length b (μm) of a long axis of the conductive assistant particles, which are determined by observing the cross section, satisfy the following relationship: L≤b. The all-solid-state battery of the present invention includes the all-solid-state battery electrode of the present invention as a positive electrode and/or a negative electrode.