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Flexible light-weight Lithium ion conducting inorganic-organic composite electrolyte membrane for Lithium-air Battery

Technology #15183n

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Prof Stefan Adams
Safanama Dorsasadat
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Mr Prasanna Shiridi Sai
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Tech Offer 15183N Lithium Ion Conducting Membrane [PDF]

Flexible light-weight Lithium ion conducting inorganic-organic composite electrolyte membrane for Lithium-air Battery

Prof Stefan Adams, Safanama Dorsasadat

Faculty of Engineering, Dept. of Materials Science and Engineering 

Industry Problem

Rechargeable Lithium-air battery (LAB) is a promising power source with high specific energy. A fast ion-conducting membrane is a key component behind the successful performance of a Li-air battery. The membrane protects the lithium or lithium alloy anode from reacting chemically with the catholyte or cathode material. However none of the potential materials for membrane has proved satisfactory. For example, ceramic ionic conductors are hardly scalable, difficult to seal, brittle and electrochemically unstable against the commonly used catholytes. On the other hand, organic polymers do not have a suitable combination of high mechanical as well as electrochemical stability with fast Lithium ion conductivity.

Solution

Prof Stefan Adams’ research group from the Faculty of Engineering has developed fast Lithium ion conducting, light-weight, flexible hybrid inorganic-organic membranes. The developed membranes combine the fast-ionic conductivity, electrochemical and mechanical stability of their ceramic component with the fundamental advantage of organic compounds that they are more easily scalable and more easily molded into desired shapes and sizes than purely ceramic solid electrolytes. The hybrid membrane exhibited high ionic conductivity of 1.0×10-4 Scm-1 with excellent chemical stability in both neutral and acidified lithium chloride solutions. The applicability of the hybrid membrane in aqueous/hybrid LABs is demonstrated. The greatly enhanced stability of the hybrid membrane resulted in significantly improved battery performance and cycle life. Under current density of 0.03 mAcm-2, the Li-air cell with acidified LiCl (10M) cycled for 140 hours with overpotential < 0.4 V for most of the cycles.


Value Proposition

•  High Li-ion conductivity

•  High chemical stability in contact with catholyte solution

•  Sufficient mechanical stability to prevent penetration by Lithium dendrites

•  Ease of fabrication leading to scalability to desired dimensions

Potential Application

Anode-protecting membranes for large-scale lithium-based battery designs

For more information, contact:

NUS Industry Liaison Office

  : (65) 6516  3622

  : prasanna.s@nus.edu.sg

  : www.ilo.nus.edu.sg

Prof. Stefan Adams

Department of Material science & Engineering

National University of Singapore

Email: mseasn@nus.edu.sg

ILO Ref: 15183n