Positive electrode for rechargeable lithium batteries
First Claim
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1. A battery comprising:
- a) an electrolyte;
b) a positive electrode having an active material and comprising a current collector which has a major surface facing the active material; and
c) a layer between the major surface of the current collector and the electrolyte, said layer comprising a conductive polymer having single and double bonds alternating along a main polymer chain and being a conductor of electrons and capable of restricting penetration of one or more of electrolyte and active material therethrough.
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Abstract
In an electrochemical lithium cell having an active metal negative electrode, a positive electrode and an electrolyte separator there is provided a layer between the current collector and the positive electrode, which layer comprises a carbon-based material which is a conductor of electrons and which restricts penetration of electrolyte therethrough to prevent corrosion of the positive electrode.
64 Citations
8 Claims
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1. A battery comprising:
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a) an electrolyte; b) a positive electrode having an active material and comprising a current collector which has a major surface facing the active material; and c) a layer between the major surface of the current collector and the electrolyte, said layer comprising a conductive polymer having single and double bonds alternating along a main polymer chain and being a conductor of electrons and capable of restricting penetration of one or more of electrolyte and active material therethrough. - View Dependent Claims (2, 3, 4)
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- 5. In a battery having a lithium-containing negative electrode body, a positive electrode body containing an active material, an electrolyte separator in the form of a polymeric network containing an electrolyte solution comprising a metal salt of the negative electrode disposed between the negative and positive electrode bodies, and a current collector adjacent a surface of the positive electrode body remote from the electrolyte separator, the improvement comprising a layer between the current collector and the active material of the positive electrode, said layer comprising at least one conductive polymer having single and double bonds alternating along a main polymer chain and being a conductor of electrons and capable of restricting penetration of one or more of electrolyte and active material therethrough.
Specification