Anode for lithium-ion battery
AssigneeGraftech Inc.
InventorsRonald Alfred Greinke, Daniel Witold Krassowski, Neal David Phillips
Life of this patent
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Abstract
An anode for a lithium-ion battery is presented as well as a process for producing an anode for a lithium-ion battery. The anode is formed from a generally continuous sheet of particles of exfoliated graphite having a thickness of no more than about 350 microns, itself or in a laminate with a metallic substrate. The process involves laminating particles of exfoliated graphite to a metallic substrate, such that the particles of exfoliated graphite form a generally continuous sheet of graphite having a thickness of no more than about 350 microns. The inventive anode reduces or eliminates capacity fading due to contact loss and has superior permeability to lithium.
Claims27
A process for producing an anode for a lithium-ion battery, comprising laminating particles of exfoliated graphite to a metallic substrate, such that the particles of exfoliated graphite form a binder-free sheet of graphite having a thickness of no more than about 350 microns.
A process for producing an anode for a lithium-ion battery, comprising laminating particles of exfoliated graphite to a copper substrate, such that the particles of exfoliated graphite form a binder-free sheet of graphite having a thickness of no more than about 350 microns, wherein a first set of fibers of carbon or graphite having a length less than the thickness of the sheet of graphite are admixed with the particles of exfoliated graphite prior to laminating the particles of exfoliated graphite to the copper substrate.
An anode for a lithium-ion battery which comprises a binder-free sheet of particles of exfoliated graphite having a thickness of no more than about 350 microns.
Dependencies are inferred from the claim text.