X-ray Diffraction for Non-destructive Electrode Density and Porosity Measurement
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Solution Overview
Problem
Current methods for measuring electrode density and porosity in lithium secondary batteries are destructive, time-consuming, and costly, requiring electrode sampling and complex processes.
Innovation Solution
A non-destructive method using X-ray diffraction to measure electrode density and porosity by obtaining and analyzing the relative intensities of diffraction peaks, specifically the I peak in parallel and perpendicular directions, allowing for efficient calculation of electrode properties without damaging the electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If destructive sampling method is used to measure electrode density and porosity, then measurement can be performed, but electrode is damaged and measurement time and cost increase
Solution Approach 1:
The patent replaces the mechanical destructive sampling method with X-ray diffraction technology. Instead of physically cutting and dissolving electrode samples to measure density and porosity, the invention uses X-ray beams to obtain diffraction patterns that correlate with these properties. This substitution eliminates the need for physical destruction of electrodes while maintaining measurement capability, directly resolving the contradiction between measurement precision and time loss.
2Measurement precision
If destructive sampling method is used to measure electrode density and porosity, then measurement can be performed, but electrode is damaged and cost increases
Solution Approach 1:
The patent replaces the mechanical destructive sampling method with X-ray diffraction technology. Instead of physically cutting and dissolving electrode samples to measure density and porosity, the invention uses X-ray beams to obtain diffraction patterns that correlate with these properties. This substitution eliminates the need for physical destruction of electrodes while maintaining measurement capability, directly resolving the contradiction between measurement precision and time loss.
3Measurement precision
If complex dissolution process is used to measure electrode properties, then accurate measurement can be achieved, but process complexity increases
Solution Approach 1:
The patent replaces the complex chemical dissolution process with X-ray diffraction measurement. Instead of dissolving electrode base materials in predetermined solvents to isolate and measure active material properties, the invention directly measures X-ray diffraction patterns from the intact electrode. The diffraction peak intensities provide information about electrode density and porosity without requiring any chemical processing, thus eliminating process complexity while maintaining measurement accuracy.
4Ease of operation
If X-ray diffraction method is used to measure electrode density and porosity, then non-destructive measurement is achieved, but measurement method complexity increases
Solution Approach 1:
The patent uses parameter changes in the X-ray diffraction measurement system to simplify the overall process. By adjusting and optimizing parameters such as X-ray wavelength, diffraction angle ranges, and peak intensity analysis methods, the invention achieves non-destructive measurement with a relatively simple operational procedure. The established correlation between diffraction peak intensities and electrode properties provides a straightforward measurement protocol that balances ease of operation with measurement capability.
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
Enables accurate and efficient measurement of electrode density and porosity with high correlation coefficients, reducing errors and production costs by avoiding destructive sampling and simplifying the measurement process.
Implementation Method 1
obtaining an I peak in parallel direction/I peak in perpendicular direction value of an electrode active material by X-ray diffraction
Implementation Method 2
X-ray diffraction
Data Source
Figure 1A
Figure 1B~1C
Figure 2A
AI summary
Provided are methods of measuring electrode density and electrode porosity using X-ray diffraction. According to the methods of measuring electrode density and porosity of the present invention, electrode density and porosity may be efficiently measured by a non-destructive method using X-ray diffraction.