Polymer-containing electrolyte composition
JP2026508850APending Publication Date: 2026-03-13SOUTH 8 TECHNOLOGIES INC
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Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2026-03-13
AI Technical Summary
Technical Problem
Existing lithium-ion batteries face safety hazards due to flammable electrolytes, with current safety measures either compromising performance or being inefficient and complex, and there is a need for improved polymer electrolyte production methods to prevent thermal runaway.
Method used
A method involving liquefied gas electrolytes with dissolved polymers that precipitate as a solid upon venting, increasing cell impedance and preventing thermal runaway without affecting normal operation, using a process that avoids heating and maintains conductivity.
Benefits of technology
The method effectively prevents thermal runaway in lithium-ion batteries by ensuring high impedance post-vent, maintaining performance during normal operation, and reducing manufacturing costs.
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Smart Images
Figure 2026508850000001_ABST
Abstract
This invention discloses a method and materials for adding polymer materials to a liquefied gas electrolyte solution in electrochemical energy storage devices such as lithium-ion batteries and related technologies, in order to further improve the safety of battery cells. An example device includes an ion-conducting electrolyte comprising a liquefied gas solvent, a salt, and a polymer. The liquefied gas solvent has a vapor pressure of more than 100 kPa at 293.15 K, and the polymer is present at a sufficiently low concentration and completely dissolved in the liquefied gas solvent. The device may further include an anode in contact with the ion-conducting electrolyte, a cathode, and a separator layer. A housing can accommodate the ion-conducting electrolyte, anode, cathode, and separator layer.
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