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Industrial Research And Consultancy Centre
Patent
Sulfide Superionic Conductor for Lithium-Ion Battery Application and a Synthesis Process Thereof
Abstract

This invention outlines an ultrafast synthesis route for superionic sulfide solid electrolytes using microwave heating. This method significantly reduces the synthesis time and cost, making it a viable alternative to traditional heating methods for producing lithium silicon phosphorus sulfide (LSiPS) solid electrolytes for all-solid-state lithium batteries.

Figure 1. Germanium-free dense lithium superionic conductor and interface re-engineering for all-solid-state lithium batteries against high-voltage cathode

Problem Statement

Current lithium-ion batteries with liquid electrolytes suffer from safety hazards, including low thermal stability and flammability. Traditional synthesis methods for solid electrolytes are time-consuming and costly, hindering their commercial application in advanced battery technologies.

Uniqueness of the Solution
  • Ultrafast synthesis in just 30 minutes, reduces time by 16-144 times as compared to conventional methods. 
  • It is a cost-effective method as it eliminates the need for expensive vacuum sealing and argon gas purging, simplifying the process. 
  • The high-performance electrolyte delivers a high ionic conductivity (2.42 mS/cm) suitable for commercial applications. 
  • High fraction (~89%) of the high-conducting tetragonal phase in the synthesized product. 
  • The simplified process makes the synthesis more accessible for large-scale production.
Prototype Details

NA

Current Status of Technology

The technology has been successfully demonstrated with the synthesis of LSiPS solid electrolytes, showcasing significant improvements in synthesis time and ionic conductivity.

Technology readiness level

4

Societal Impact

This technology promises safer and more efficient batteries, contributing to the advancement of electric vehicles and portable electronics, thereby reducing reliance on fossil fuels and enhancing energy security.

Applications or Domain
  • Energy Storage: Enhancement of all-solid-state lithium batteries for electric vehicles (EVs), portable electronic devices, and grid storage
  • Advanced Battery Technology: Potential use in next-generation batteries with higher energy densities and improved safety profiles

Geography of IP

Type of IP

Application Number

202321010738

Filing Date
Grant Number

489082

Grant Date
Assignee(s)
Indian Institute of Technology Bombay
**This IP is owned by IIT Bombay**