Ceramic Solid Electrolyte Preparation for Uniform Particle Distribution
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Solution Overview
Problem
Conventional methods for synthesizing ceramic solid electrolytes result in materials with uneven particle distribution and shape, leading to low ionic conductivity and reduced electrochemical properties in lithium secondary batteries.
Innovation Solution
The method involves mixing raw materials using distilled water as a solvent, followed by ball-milling, and applying a rotary concentration method or spray method for drying, which results in ceramic solid electrolyte particles with spherical shapes and even distribution, enhancing ionic conductivity and electrochemical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional solid phase mixing and ball-milling method is used, then the synthesis process is simple, but the particle distribution is uneven and particle shape is irregular, resulting in low ionic conductivity
Solution Approach 1:
The patent introduces water as an intermediary solvent to facilitate uniform mixing of raw materials. The slurry formulation with water allows particles to disperse evenly before drying, achieving uniform particle distribution without complex processing equipment. This resolves the contradiction by using a simple liquid medium to achieve precision that would otherwise require complex mixing devices.
Solution Approach 2:
The patent changes the physical state of the mixing medium from dry solid phase to liquid slurry phase. This parameter change enables better particle dispersion and uniform distribution during mixing. The subsequent drying process removes the liquid, leaving uniformly distributed particles with improved shape and distribution uniformity.
2Reliability
If conventional dry ball-milling is used, then the manufacturing process is straightforward, but the ionic conductivity is low due to uneven particle distribution
Solution Approach 1:
Water acts as an intermediary medium during mixing, enabling uniform distribution of particles. This simple liquid mediator achieves reliable ionic conductivity by ensuring even particle distribution, eliminating the need for complex dry mixing procedures while maintaining manufacturing simplicity.
Solution Approach 2:
The patent utilizes phase transition from liquid slurry to solid particles through drying. The liquid phase enables uniform mixing, and the phase transition to solid during drying preserves the uniform distribution, achieving high ionic conductivity through a simple phase change process rather than complex manufacturing steps.
3Manufacturing precision
If irregular shaped particles are used, then the synthesis is easier, but the electrochemical properties are reduced
Solution Approach 1:
The liquid slurry medium with water facilitates uniform particle formation during mixing. This simple liquid intermediary produces particles with consistent spherical shapes, which exhibit superior electrochemical properties compared to irregular particles, resolving the contradiction between shape uniformity and electrochemical performance.
Solution Approach 2:
The patent produces spherical particles through the slurry drying process. The spherical shape improves packing density and contact between particles, enhancing electrochemical properties. This natural spheroidization during drying achieves shape uniformity that benefits performance without requiring complex shaping 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 approach enables the preparation of high-performance ceramic electrolytes with improved particle uniformity, leading to increased ionic conductivity and enhanced electrochemical properties when used in lithium secondary batteries.
Implementation Method 1
drying first by a rotary concentration method or a spray method
Data Source
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AI summary
The present invention relates to a method for preparing a ceramic solid electrolyte having a even particle distribution, excellent crystallinity, and high ionic conductivity. Step 1 for preparing the ceramic solid electrolyte particles may be a step for adding and mixing raw materials to distilled water to prepare a solid electrolyte precursor. Step 2 may be a step for mixing the solid electrolyte precursor with a ball-mill. Step 3 may be a step for drying first by rotary concentrating or spraying. Step 4 may be a step for drying second in a dryer at 80°C for at least 24 hours to completely remove the distilled water solvent. Step 5 may be a step for calcining first ceramic particles in a heat treatment device and firing second the ceramic particles.