Multi-layered polymeric gel electrolyte and electrochemical cell using same
AssigneeMotorola, Inc.
InventorsGanesh Venugopal, Anaba A. Anani
Life of this patent
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Abstract
An electrochemical cell 10 includes first and second electrodes 12 and 14 with an electrolyte system 26 disposed therebetween. The electrolyte system includes at least a first and second layer 28 and 30, the second or gelling layer 30 being used to absorb an electrolyte active species.
Claims58
An electrolyte system for an electrochemical cell, comprising:
- a discrete, first electrolyte polymeric carrier layer which comprises a plurality of sublayers, is non-gelling, and having first and second major surfaces;
- a discrete second electrolyte polymeric carrier layer which is substantially gelling, and is disposed on at least one of said first and second major surfaces of said first electrolyte carrier layer;
- and
- an electrolyte active species dispersed throughout at least said discrete second electrolyte layer wherein the gelling layer is not present in the non-gelling layer.
An electrolyte system for an electrochemical cell, comprising a multi-layered structure including a non-gelling, discrete, first electrolyte polymeric carrier layer comprising a plurality of sublayers, and sandwiched between first and second layers of a gelling, discrete second electrolyte polymeric carrier layer and at least said gelling layers having an electrolyte active species dispersed therein;
- wherein the gelling layer is not present in the non-gelling layer.
An electrochemical cell, comprising:
- an anode;
- a cathode;
- and
- an electrolyte system including a multi-layered structure having a non-gelling, discrete, first electrolyte polymeric carrier layer comprising a plurality of sublayers and sandwiched between first and second layers of a gelling, discrete second electrolyte polymeric carrier layer and at least said gelling layers having an electrolyte active species dispersed therein wherein the gelling layer is not present in the non-gelling layer.
An electrolyte separator system for an electrochemical cell, comprising:
- a discrete, first electrolyte polymeric carrier layer which is non-gelling and comprising a plurality of sublayers, and having first and second major surfaces;
- and
- a discrete second electrolyte polymeric carrier layer which is gelling, and is disposed on at least one of said first and second major surfaces of said first electrolyte carrier layer wherein the gelling layer is not present in the non-gelling layer.
An electrolyte system for an electrochemical cell comprising a multilayered structure including a discrete, first electrolyte polymeric carrier layer that is non-gelling and that is sandwiched between discrete second and third electrolyte polymeric carrier layers that are gelling, said second and third layers comprising polyvinylidene fluoride and having an electrolyte species dispersed therein wherein the gelling layer is not present in the non-gelling layer.
An electrochemical cell, comprising:
- an anode;
- a cathode;
- and
- an electrolyte system including a multi-layered structure having a discrete, first electrolyte polymeric carrier layer that is substantially non-gelling and that is sandwiched between second and third electrolyte polymeric carrier layers that are substantially gelling and are fabricated of polyvinylidene fluoride, said gelling layer that include an electrolyte active species dispersed therein wherein the gelling layer is not present in the non-gelling layer.
Dependencies are inferred from the claim text.