Cathode composition and method of making same
First Claim
1. An electrochemical cell comprising an anode (negative electrode);
- a cathode (positive electrode); and
an electrolyte layer disposed between the anode and the cathode, the improvement wherein the cathode comprises two polymeric materials, one being an ionically conductive polymer and the other one being an electrically conductive polymer having single and double bonds alternating along a main polymer chain.
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Abstract
In accordance with the invention, a new cathode composition is prepared in a preferred method, in situ, in a cell whereby such in situ formation results in enhanced contact between the cathode composition and the current collector and between the electrolyte layer and the cathode composition.
The new cathode composition of the invention comprises first and second polymeric materials, the first being radiation cured and ionically conductive and the second being electrochemically cured and electrically conductive. Preferably, the first is radiation cured before the second is electrochemically cured. The second polymeric material is cured in an electrochemical cell which comprises an alkali metal-containing anode layer. The cell desirably contains an electrolyte which consists of a solid ionically conductive polymeric material.
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13 Claims
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1. An electrochemical cell comprising an anode (negative electrode);
- a cathode (positive electrode); and
an electrolyte layer disposed between the anode and the cathode, the improvement wherein the cathode comprises two polymeric materials, one being an ionically conductive polymer and the other one being an electrically conductive polymer having single and double bonds alternating along a main polymer chain. - View Dependent Claims (11, 12, 13)
- a cathode (positive electrode); and
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2. An electrochemical cell comprising
a) an anode (negative electrode) comprising lithium; -
b) an electrolyte layer comprising a lithium salt and an ionically conductive polymer; c) a cathode (positive electrode) having a composition comprising first and second polymeric materials, the first being an electrically conductive polymer having single and double bonds alternating along a main polymer chain and the second being an ionically conductive polymer having ethene-based repeat units. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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Specification