Ceramic Solid Electrolyte Preparation for Uniform Spherical Particles
Find Innovative SolutionsGenerate Solutions
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 batteries.
Innovation Solution
The method involves mixing raw materials using water as a solvent and applying a rotary concentration method or spray method to achieve spherical particles with even distribution, thereby enhancing ionic conductivity and electrochemical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxide-based solid electrolyte is prepared by solid phase method, then it is stable in atmosphere, but particles are uneven and crystallinity varies greatly
Solution Approach 1:
The patent changes the preparation parameters from conventional solid-phase sintering to a wet chemical synthesis method followed by controlled heat treatment. This involves dissolving raw materials in water to form a homogeneous slurry, drying to form a precursor, and then performing two-stage heat treatment (400-500°C for 2-10 hours followed by 900-1200°C for 2-10 hours) to achieve uniform spherical particles with consistent crystallinity while maintaining atmospheric stability
Solution Approach 2:
The patent introduces water as an intermediary medium to dissolve raw materials and form a homogeneous slurry before drying and heat treatment. This water-based intermediary enables uniform distribution of metal ions, leading to uniform particle formation and consistent crystallinity after heat treatment, while the final product remains stable in atmospheric conditions
2Reliability
If sulfide-based solid electrolyte is used, then it has high conductivity and ductility, but it has severe odor and is unstable in air and water
Solution Approach 1:
The patent prepares oxide-based composite solid electrolytes with uniform spherical particle morphology through controlled synthesis. The composite nature of the oxide material provides both high ionic conductivity (comparable to sulfides) and superior stability in air and water, eliminating the harmful odor and instability issues of sulfide-based electrolytes while maintaining ductility
3Ease of manufacture
If conventional solid phase method is used to mix raw materials, then it is simple to manufacture, but particle distribution is uneven and shape varies
Solution Approach 1:
The patent changes the manufacturing approach from dry solid-phase mixing to wet chemical synthesis. Raw materials are dissolved in water to form a homogeneous slurry, which is then dried to form a uniform precursor. Subsequent two-stage heat treatment produces spherical particles with consistent size and shape, achieving high manufacturing precision while maintaining ease of manufacture through a systematic process
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 allows for the preparation of high-performance ceramic electrolytes with even particle shape and distribution, leading to improved ionic conductivity and electrochemical properties in batteries.
Implementation Method 1
mixing the mixture by ball-milling in a dry state, and then heating the mixture. The ceramic solid electrolyte prepared by this way has low ionic conductivity because it has uneven particle distribution and various shapes of particles
Implementation Method 2
mixing raw materials using water as a solvent and applying a rotary concentration method or spray method to achieve spherical particles with even distribution
Implementation Method 3
mixing the mixture by ball-milling in a dry state, and then heating the mixture
Implementation Method 4
Most of these oxide-based solid electrolytes are prepared by a solid phase method, so the particles are uneven and the crystallinity varies greatly depending on the heat treatment temperature
Data Source
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.