Solid Electrolyte Glass for High-Voltage Lithium Batteries
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Solution Overview
Problem
Current solid electrolytes for lithium and sodium-ion batteries suffer from poor ionic conductivity and insufficient stability, which limits their application in next-generation battery designs, particularly in terms of safety and electrochemical window, making them unsuitable for high-voltage battery cells and vehicles.
Innovation Solution
Development of a glassy electrolyte with a disordered amorphous phase, specifically R3-2xMxHalO, where R is lithium or sodium, M is magnesium, calcium, strontium, or barium, and Hal is fluorine, chlorine, or iodine, exhibiting ionic conductivity of at least 13 mScm^-1 at 25°C and an electrochemical window of over 8 V, enhancing safety and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional electrolytes are used, then manufacturing is easier, but safety deteriorates due to flammability
Solution Approach 1:
The patent changes the physical state parameter of the electrolyte from liquid to solid glassy phase. This phase change eliminates flammability while the synthesis process remains relatively simple, involving mixing precursors and heating to form the glassy electrolyte with formula R3-2xMxHalO, thus maintaining ease of manufacture while dramatically improving safety
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
The glassy electrolyte demonstrates improved ionic conductivity and electrochemical stability, making it suitable for high-voltage battery applications, ensuring safety and performance in lithium and sodium-ion batteries, particularly in electric vehicles, with features like non-flammability, recyclability, and low toxicity.
Implementation Method 1
a first solid electrolyte glass comprising formula Li3-2xMxHalO wherein M is selected from the group consisting of magnesium, calcium, strontium or barium; Hal is selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures thereof
Implementation Method 2
the solid electrolyte glass has a glass transition point, wherein a glassy phase is obtainable by heating- cooling cycles up to 250 °C
Data Source
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AI summary
Glassy electrolyte for lithium or sodium ions conduction The present disclosure relates to the development and improvement of sodium or lithium-ion electrochemical devices, in particular to the development of a new glassy electrolyte comprising high ionic conductivity for batteries, capacitors, and other electrochemical devices comprising a solid electrolyte glass comprising the formula R3- 2xMxHalO wherein R is selected from the group consisting of lithium or sodium; M is selected from the group consisting of magnesium, calcium, strontium or barium; Hal is selected from the group consisting of fluorine, chlorine, bromine, iodine or mixtures thereof; X is the number of moles of M and 0 ≤ x ≤ 0.01 and the solid electrolyte glass has a glass transition point.