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US 9,490,478 B2Granted
Electrochemical cells comprising fibril materials
AssigneeSion Power Corporation
InventorsYuriy V. Mikhaylik, David L. Coleman
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Abstract
The use of fibril materials, such as fibril cellulose materials and other similar materials, in electrochemical cells and components thereof is generally described.
Claims25
An electrode, comprising:
- an electrochemically active material;
- a plurality of electronically conductive particles;
- and
- electronically non-conductive and/or polymeric fibrils in contact with at least a portion of the electrochemically active material and/or at least a portion of the electronically conductive particles such that:
- at least a portion of the fibrils mechanically join electronically conductive particles to each other, and/or
- at least a portion of the fibrils mechanically join electronically conductive particles to electrochemically active material,
- wherein at least about 50% of the total volume occupied by the fibril material is made up of fibrils having maximum cross-sectional diameters of less than about 1 micrometer and aspect ratios of at least about 10:1.
4 more elements
An electrode, comprising:
- a layer comprising an electrochemically active material comprising lithium metal and/or a lithium alloy;
- and
- a protective layer that protects the lithium metal and/or the lithium alloy from non-electrochemical chemical reactions, the protective layer over the layer comprising the electrochemically active material, and the protective layer comprising fibrils and a matrix material;
- wherein:
- at least a portion of the fibrils are electronically non-conductive and/or polymeric,
- at least about 50% of the total volume occupied by the fibril material is made up of fibrils having maximum cross-sectional diameters of less than about 1 micrometer and aspect ratios of at least about 10:1, and
- at least a portion of the fibrils are in contact with the matrix material.
4 more elements
A method, comprising:
- coating at least a portion of a substrate with a suspension comprising a particulate support material and fibrils suspended in a liquid carrier;
- and
- removing at least a portion of the liquid carrier from the suspension, wherein:
- at least a portion of the fibrils are electronically non-conductive and/or polymeric, and
- at least about 50% of the total volume occupied by the fibril material is made up of fibrils having maximum cross-sectional diameters of less than about 1 micrometer and aspect ratios of at least about 10:1, and
- after at least a portion of the liquid carrier is removed from the suspension, at least a portion of the fibrils mechanically join particles of the particulate support material.
3 more elements
Dependencies are inferred from the claim text.