Case 15197

Layer-by-Layer Separator Membrane for Lithium-Ion Battery

Keywords:
Polyelectrolyte, layer-by-layer (LbL), lithium-ion battery

Applications:
Thin films used for the highly ion-conductive lithium ion battery separator

Problem:
Improving the ionic conductivity of the membrane

Technology:
This invention uses the layer-by-layer technique to prepare tunable films for use in lithium ion battery separators. The number of bilayers can be selected to control thickness. Polyelectrolyte chemical structure can be selected to control ionic conductivity and lithium-ion transference number. These multilayers can be formed using the dipping approach or the spraying approach.

Advantages:

Increased ionic conductivity and lithium-ion transference number

Tunable polyelectrolyte films allows for flexibility in operating conditions

Inventors:

Professor Paula T. Hammond (Department of Chemical Engineering, MIT)

Professor Yet-Ming Chiang (Department of Material Sciences and Engineering, MIT)

Professor W. Craig Carter (Department of Material Sciencse and Engineering, MIT)

Bilal El-Zahab (Department of Chemical Engineering, MIT)

Intellectual Property:
US Provisional Patent Application 61/546457 filed 10/12/2011.

Publications:

Last revised: January 17, 2012

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