Halide Material Mechanochemistry for Fast Ionic Conductor Synthesis
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Solution Overview
Problem
Existing methods for producing halide materials with high ionic conductivity require long times and high-energy milling treatments, and often result in incomplete reactions with single cationic halides remaining, which impede efficient synthesis.
Innovation Solution
A method involving mechanochemical treatment of a material mixture containing a first compound with Li, M1, and X1, and a second compound with M2, where M1 and M2 are metal or metalloid elements, and X1 is F, Cl, or I, to produce a halide material with improved ionic conductivity and amorphous phase, utilizing a ball mill for efficient processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-energy milling treatment is used to produce halide materials with high ionic conductivity, then ionic conductivity is improved, but production time is excessively long and energy consumption is high
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing a compound containing Li, M1, and X1 before the mechanochemical treatment. This preparation step ensures that the reactants are in the optimal state for the subsequent mechanochemical reaction, enabling complete reaction in shorter time without requiring excessive milling energy
Solution Approach 2:
The patent changes the reaction parameters by using mechanochemical treatment with specific ball mill conditions (rotation speed 30-80 rpm, treatment time 0.5-12 hours) instead of traditional high-energy milling. This parameter optimization achieves high ionic conductivity while significantly reducing production time and energy consumption
2Productivity
If traditional producing methods are used, then production time is reduced, but single cationic halides remain unreacted which lowers ionic conductivity
Solution Approach 1:
The patent uses preliminary action by preparing a compound containing Li, M1, and X1 in advance with specific stoichiometry. This ensures that all components are properly proportioned and reactive, allowing complete conversion during mechanochemical treatment without leaving unreacted single cationic halides
Solution Approach 2:
The compound containing Li, M1, and X1 acts as an intermediary that facilitates complete reaction. It serves as a pre-formed reactive complex that ensures all cations are properly coordinated, preventing the formation of unreacted single cationic halides during the mechanochemical 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 enables the production of halide materials with high ionic conductivity in a shorter time, enhancing their reliability and environmental resistance, while suppressing the presence of single cationic halides to improve lithium ion conductivity and mechanical properties.
Implementation Method 1
subjecting a material mixture containing a first compound containing Li, M1, and X1 and a second compound containing M2 to mechanochemical treatment
Data Source
AI summary
A halide material producing method according to the present disclosure includes (A) subjecting a material mixture containing a first compound containing Li, M1, and X1 and a second compound containing M2 to mechanochemical treatment, wherein each of M1 and M2 represents one type of element selected from a metal element and a metalloid element, and X1 represents at least one selected from the group consisting of F, Cl, Br, and I.