Composite solid electrolyte for protection of active metal anodes
First Claim
1. A substantially impervious composite solid electrolyte, comprising:
- a base component comprising a continuous inorganic solid electrolyte matrix having through pores;
a filler component contained in the base component through pores and providing a fluid barrier, wherein the filler component is not conductive to metal ions;
wherein the composite layer has metal ion conductivity of at least 10−
6 S/cm.
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Accused Products
Abstract
A composite solid electrolyte include a monolithic solid electrolyte base component that is a continuous matrix of an inorganic active metal ion conductor and a filler component used to eliminate through porosity in the solid electrolyte. In this way a solid electrolyte produced by any process that yields residual through porosity can be modified by the incorporation of a filler to form a substantially impervious composite solid electrolyte and eliminate through porosity in the base component. Methods of making the composites is also disclosed. The composites are generally useful in electrochemical cell structures such as battery cells and in particular protected active metal anodes, particularly lithium anodes, that are protected with a protective membrane architecture incorporating the composite solid electrolyte. The protective architecture prevents the active metal of the anode from deleterious reaction with the environment on the other (cathode) side of the architecture, which may include aqueous, air and organic liquid electrolytes and/or electrochemically active materials.
272 Citations
95 Claims
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1. A substantially impervious composite solid electrolyte, comprising:
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a base component comprising a continuous inorganic solid electrolyte matrix having through pores; a filler component contained in the base component through pores and providing a fluid barrier, wherein the filler component is not conductive to metal ions; wherein the composite layer has metal ion conductivity of at least 10−
6 S/cm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83)
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84. A substantially impervious composite solid electrolyte layer, comprising:
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a monolithic solid electrolyte membrane base component having fluid permeable through pores that extend from one major surface of the base component membrane to an opposing major surface, the membrane comprising a continuous inorganic solid electrolyte matrix having an intact ion conductive network; a filler component, the filler component not conductive to metal ions, the filler component contained in the membrane through pores, and therein providing a fluid barrier; wherein the composite layer has metal ion conductivity of at least 10−
6 S/cm.
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85. A method of fabricating a substantially impervious composite solid electrolyte, the method comprising:
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providing a base component comprising a continuous inorganic solid electrolyte matrix having through pores; and impregnating the base component with filler material forming a fluid barrier filler component in the through pores of the base component, wherein the filler component is not conductive to metal ions, such that the composite solid electrolyte is rendered substantially impervious. - View Dependent Claims (86, 87, 88, 89, 90, 91, 92, 93, 94)
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95. A method of fabricating a protected anode, the method comprising:
- forming a laminate of an active metal anode, a first component layer adjacent to the active metal anode that is ionically conductive and chemically compatible with an active metal, and a composite solid electrolyte layer adjacent to the first layer that is substantially impervious, active metal ion conductive and chemically compatible with the first layer material;
wherein the ionic conductivity of the protective membrane architecture is at least 10−
6 S/cm; and
wherein the composite solid electrolyte layer comprises a continuous inorganic solid electrolyte matrix having through pores, and wherein the through pores contain a filler component that provides a fluid barrier, wherein the filler component is not conductive to metal ions.
- forming a laminate of an active metal anode, a first component layer adjacent to the active metal anode that is ionically conductive and chemically compatible with an active metal, and a composite solid electrolyte layer adjacent to the first layer that is substantially impervious, active metal ion conductive and chemically compatible with the first layer material;
Specification