Garnet Electrolyte Powder Color Metrics for Quality Control
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Solution Overview
Problem
The cumbersome nature of using the specific surface area determined through a gas adsorption method for quality control of electrolyte powders with a garnet-type crystal structure containing Li, Zr, and La.
Innovation Solution
The electrolyte powder is characterized by specific chromatic coordinates in the CIE 1976L*a*b* color space, with b*≥2, a*≥0, and 2≤c*≤10, and optionally containing Mg and Sr, facilitating easy quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the specific surface area determined through a gas adsorption method is used as a quality control index, then the quality control accuracy is improved, but the operation complexity and time consumption increase
Solution Approach 1:
The invention changes the measurement parameter from specific surface area (requiring gas adsorption) to color coordinates (L*a*b* values) in the CIE 1976 color space. This parameter substitution maintains quality control accuracy while dramatically simplifying the measurement process. The color coordinates serve as alternative indicators that correlate with electrolyte powder quality without requiring complex gas adsorption apparatus or procedures.
2Measurement precision
If the specific surface area determined through a gas adsorption method is used as a quality control index, then the quality control accuracy is improved, but the measurement time increases
Solution Approach 1:
The invention substitutes the measurement parameter from specific surface area to color coordinates (L*, a*, b* values). Color measurement using a colorimeter or spectrophotometer is significantly faster than gas adsorption methods, reducing measurement time while maintaining quality control accuracy. The color parameters provide rapid quality assessment without the time-consuming gas adsorption process.
3Measurement precision
If the specific surface area determined through a gas adsorption method is used as a quality control index, then the quality control accuracy is improved, but the device complexity increases
Solution Approach 1:
The invention changes the measurement parameter from specific surface area to color coordinates, which can be measured using simple colorimeters or spectrophotometers. These devices are much less complex than the gas adsorption apparatus required for specific surface area measurement. The color measurement approach eliminates the need for complex vacuum systems, gas flow control, and adsorption isotherm analysis equipment.
Data Source
AI summary
To provide an electrolyte powder, a sheet, an electrochemical element, and a power storage device, which can facilitate quality control. The electrolyte powder has a garnet-type crystal structure containing Li, Zr, and La, and satisfies b*≥2 in chromatic coordinates of CIE 1976L*a*b* color space. In the electrolyte powder, a*≥0 may be satisfied, or a chroma defined by c*={(a*)2+(b*)2}1/2 may satisfy 2≤c*≤10. The sheet, electrochemical element, and power storage device each contain the electrolyte powder.