All-Solid-State Li-Ion Battery Evaluation Using XRD Reaction Detection
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Solution Overview
Problem
There is a need for a more efficient method to evaluate the battery characteristics of oxide-based all-solid-state lithium-ion batteries, as existing methods are not sufficient for comprehensive assessment.
Innovation Solution
A method involving the comparison of X-ray diffraction patterns of a compact made by mixing and pressing the oxide-based solid electrolyte and positive electrode active material with those of a fired body, to determine if a reaction product is generated between the two components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional evaluation methods are used for oxide-based all-solid-state batteries, then comprehensive assessment of battery characteristics can be achieved, but the evaluation process is time-consuming and inefficient
Solution Approach 1:
The patent extracts the key evaluation parameter (reaction between solid electrolyte and positive electrode active material) from the comprehensive battery characterization process. By using XRD to specifically detect reaction products, the method isolates the most critical assessment criterion, enabling rapid evaluation without performing all conventional comprehensive tests.
Solution Approach 2:
The patent replaces complex electrochemical testing and comprehensive battery performance evaluation with X-ray diffraction analysis. This substitution uses a non-destructive physical measurement technique to infer battery characteristics, dramatically reducing evaluation time while maintaining assessment quality.
2Productivity
If X-ray diffraction pattern comparison is performed to detect reaction products, then evaluation efficiency is improved, but measurement precision requirements increase
Solution Approach 1:
The patent performs preliminary XRD characterization of both the compact (before firing) and fired body (after firing) to establish baseline diffraction patterns. By comparing these pre-established patterns, the method enables rapid detection of reaction products without requiring complex real-time analysis, thus improving efficiency while maintaining precision.
Solution Approach 2:
The patent uses changes in X-ray diffraction patterns (analogous to color changes) to detect the formation of reaction products. The appearance or disappearance of specific diffraction peaks serves as a clear, easily detectable indicator of chemical reactions, enabling precise measurement with standard XRD equipment.
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 method allows for the efficient evaluation of battery characteristics by determining the presence or absence of a reaction product, which correlates with the battery's performance and charge/discharge capacity.
Implementation Method 1
comparing an X-ray diffraction pattern of a compact obtained by mixing and pressing the oxide-based solid electrolyte and the positive electrode active material with an X-ray diffraction pattern of a fired body obtained by firing the compact
Data Source
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AI summary
A method for evaluating an all-solid-state lithium-ion battery including a solid electrolyte layer including an oxide-based solid electrolyte, a positive electrode layer including a positive electrode active material, and a negative electrode layer, which evaluates the battery characteristics of the all-solid-state lithium-ion battery by comparing an X-ray diffraction pattern of a compact obtained by mixing and pressing the oxide-based solid electrolyte and the positive electrode active material with an X-ray diffraction pattern of a fired body obtained by firing the compact.