LiF-embedded SiG powder for lithium ion battery
First Claim
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1. A nanographitic composite for use as an anode in a lithium ion battery, comprising:
- particles of an electroactive material; and
a coating over each of the electroactive particles comprising a first plurality of graphene nanoplatelets and a solid electrolyte interface (SEI) modifier additive wherein the first plurality of graphene nanoplatelets and one of the electroactive particles have covalent bonding, formation of interdiffusion regions that contain both carbon and electroactive material, or a combination thereof therebetween and the SEI modifier additive is a dry powder that is disposed over at least part of the surface of the electroactive material particles, and a second plurality of graphene nanoplatets each adhered to one of the SEI modifier particles or one of the first plurality of graphene nanoplatelets by van der Waals forces.
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Abstract
A nanographitic composite for use as an anode in a lithium ion battery is described, including: particles of an electroactive material; and a coating over the electroactive particles comprising a plurality of graphene nanoplatelets and an SEI modifier additive wherein the SEI modifier additive is a dry powder that is disposed over at least part of the surface of the electroactive material particles.
14 Citations
49 Claims
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1. A nanographitic composite for use as an anode in a lithium ion battery, comprising:
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particles of an electroactive material; and a coating over each of the electroactive particles comprising a first plurality of graphene nanoplatelets and a solid electrolyte interface (SEI) modifier additive wherein the first plurality of graphene nanoplatelets and one of the electroactive particles have covalent bonding, formation of interdiffusion regions that contain both carbon and electroactive material, or a combination thereof therebetween and the SEI modifier additive is a dry powder that is disposed over at least part of the surface of the electroactive material particles, and a second plurality of graphene nanoplatets each adhered to one of the SEI modifier particles or one of the first plurality of graphene nanoplatelets by van der Waals forces. - 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)
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30. A nanographitic composite for use as an anode in a lithium ion battery, comprising:
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a plurality of composite particles comprising; an electroactive particle; a coating layer comprising an inner layer of graphene nanoplatelets that have covalent bonding, formation of interdiffusion regions that contain both carbon and electroactive material, or a combination thereof to the electroactive particle and an outer layer of graphene nanoplatelets that are van der Waal bonded with the inner layer of graphene nanoplatelets, wherein the nanographitic platelets covers at least a portion of the nanoscale particle to form a nanographitic layer; and a solid electrolyte interface (SEI) modifier additive wherein the SEI modifier additive is a dry powder. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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Specification