Sulfone-Containing Electrolytes for Highly Reversible Dendrite-Free Lithium Metal Anode

Summary

Technology Description

 

The electrolyte described enables highly reversible lithium stripping and plating of a lithium anode operating within a lithium metal battery, including but not limited to Li-S or Li-O2 batteries, while minimizing dendrite formation. The technology is a new electrolyte formula that contains sulfone molecules as the additive to the conventional aprotic electrolyte, such as ethyl methyl sulfone (EMS), tetramethylene sulfone (TMS), butyl sulfone (BS), 1-fluoro-2-(methyl sulfonyl)benzene (FS), sulfolanes, and ethyl vinyl sulfone (EVS). The formula will enable minimal dendrite formation and maintain efficiency creating a safer and more effective alternative to the current solutions.

 

Features & Benefits

  • Minimized battery performance loss
  • Double the specific energy capacity

 

Applications

 

  • Car batteries
  • Consumer electronics

 

Background of Invention

 

Lithium metal anode is the theoretical gold standard for power batteries due to its high theoretical capacity and its low standard electrochemical potential. This technology has the ability to double the specific energy capacity of the current Li-ion batteries. Initial lithium battery configurations emerged in the 1970s but quickly garnered a reputation for being unsafe due to the dendrite formation problem at the lithium metal anode that causes shorting, i.e., exothermic discharge. This led to the battery configuration called the rocking chair. However, this configuration significantly reduces the batter potential. This invention aims to address the shorting issue of the initial configurations by including an electrolyte in the batteries that would minimize the dendrite formation.

 

Status

 

Patent pending

 

 

Patent Information:
Tech ID:
OSU-18-08
Contact:
David Dickson
IP & Licensing Manager
Oregon State University
541-737-3450
david.dickson@oregonstate.edu
Inventors:
Xiulei (david) Ji
Woochul Shin
Keywords:
Batteries
electrolytes
electronics
Energy Storage
Transportation
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