Composite treatment with LiPO3
First Claim
1. An electrochemical generator comprising a cathode and an anode wherein at least one of which is a composite electrode comprising an active material, a current collector, and at least a first and a second solid electrolyte in the composite, at least one of the first and the second electrolyte comprising at least one dispersed electronic conduction additive;
- the first electrolyte being a mineral solid conductor, the second electrolyte being solid and organic;
wherein a layer of the first electrolyte coats at least part of the surface of the particles of the active material, to protect the coated surface of the particles from passivation or degradation reactions, and to maintain the quality of ionic and electronic exchanges between the active material of the composite electrode and other components of the composite electrode, the first electrolyte being impermeable to the second electrolyte.
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Accused Products
Abstract
The present invention concerns a lithium electrochemical generator including at least one composite electrode comprising an active material and a first and second solid electrolytes non-homogeneously distributed into the composite. The first solid electrolyte is of mineral nature, vitreous or partly vitreous, and is a specific conductor of lithium ions, and is preferably localized on the surface of the particles of active materials of the electrode. The second solid electrolyte is organic, comprises a dry or gelified polymer electrolyte conducting ions surrounding the dispersed solid phases and acts as a deformable binder, preferably elastomeritically, of the composite in contact also with the collector and the separator electrolyte of the generator. A thin layer of the first electrolyte wets and coats at least a part of the surface of the active material particles to protect the coated surface of passivation or degradation reactions induced by the second electrolyte, and to maintain a good quality of ionic and electronic exchanges between the active material of the electrode and the other components of the composite, the first electrolyte being impermeable to the components of the second electrolyte.
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Citations
31 Claims
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1. An electrochemical generator comprising a cathode and an anode wherein at least one of which is a composite electrode comprising an active material, a current collector, and at least a first and a second solid electrolyte in the composite, at least one of the first and the second electrolyte comprising at least one dispersed electronic conduction additive;
- the first electrolyte being a mineral solid conductor, the second electrolyte being solid and organic;
wherein a layer of the first electrolyte coats at least part of the surface of the particles of the active material, to protect the coated surface of the particles from passivation or degradation reactions, and to maintain the quality of ionic and electronic exchanges between the active material of the composite electrode and other components of the composite electrode, the first electrolyte being impermeable to the second electrolyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- the first electrolyte being a mineral solid conductor, the second electrolyte being solid and organic;
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16. A composite electrode comprising an active material, a current collector, a first mineral solid electrolyte and a second organic electrolyte, at least one of the first and the second electrolyte comprising at least one dispersed electronic conduction additive;
- the second electrolyte being in contact with the collector;
wherein the first electrolyte coats at least part of the surface of the active material particles to protect the surface thereof from passivation or degradation reactions, and to maintain a quality of ionic and electronic exchanges between the active material and other components of the composite electrode, the first electrolyte being impermeable to the second electrolyte. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- the second electrolyte being in contact with the collector;
Specification