Hydrocarbon treatment of carbonaceous materials
Assignee3M Innovative Properties Company
InventorsJeffery R. Dahn, Eddie R. P. Buiel
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Abstract
A method for making a carbonaceous material suitable for use as an electrode composition that includes contacting pyrolyzed organic material with hydrocarbon gas for a period and at a temperature sufficient to produce a carbonaceous material characterized such that when the carbonaceous material is incorporated into an electrode composition of a lithium-ion cell, the cell exhibits a reversible capacity of at least about 400 mAH/g of carbonaceous material and an irreversible capacity no greater than about 140 mAH/g of carbonaceous material, the capacities being measured up to the point of plating of metallic lithium on the surface of the carbonaceous material.
Claims34
A method for making a carbonaceous material suitable for use as an electrode composition comprising:
- contacting pyrolyzed organic material with hydrocarbon gas for a period and at a temperature sufficient to produce a carbonaceous material characterized such that when said carbonaceous material is incorporated into an electrode composition of a lithium-ion cell, the cell exhibits a reversible capacity of at least about 400 mAH/g of carbonaceous material and an irreversible capacity, as measured by the amount of lithium that cannot be fully recovered after the first charge of the lithium-ion cell, of no greater than about 140 mAH/g of carbonaceous material, said capacities being measured up to the point of plating of metallic lithium on the surface of the carbonaceous material.
A method for making a carbonaceous material suitable for use as an electrode composition comprising:
- contacting pyrolyzed organic material with a hydrocarbon gas comprising ethylene for a period and at a temperature sufficient to produce a carbonaceous material characterized such that when said carbonaceous material is incorporated into an electrode composition of a lithium-ion cell, the cell exhibits a reversible capacity of at least about 400 mAH/g of carbonaceous material, and an irreversible capacity no greater than about 140 mAH/g of carbonaceous material, said capacities being measured up to the point of plating of metallic lithium on the surface of the carbonaceous material.
A method for making a carbonaceous material suitable for use as an electrode composition comprising:
- contacting pyrolyzed organic material selected from the group consisting of pyrolyzed novolac resins, resole resins, and combinations thereof, with hydrocarbon gas for a period and at a temperature sufficient to produce a carbonaceous material characterized such that when said carbonaceous material is incorporated into an electrode composition of a lithium-ion cell, the cell exhibits a reversible capacity of at least about 400 mAH/g of carbonaceous material and an irreversible capacity no greater than about 140 mAH/g of carbonaceous material, said capacities being measured up to the point of plating of metallic lithium on the surface of the carbonaceous material.
A method for making a carbonaceous material suitable for use as an electrode composition comprising:
- contacting pyrolyzed organic material comprising pyrolyzed glucose with hydrocarbon gas for a period and at a temperature sufficient to produce a carbonaceous material characterized such that when said carbonaceous material is incorporated into an electrode composition of a lithium-ion cell, the cell exhibits a reversible capacity of at least about 400 mAH/g of carbonaceous material and an irreversible capacity no greater than about 140 mAH/g of carbonaceous material, said capacities being measured up to the point of plating of metallic lithium on the surface of the carbonaceous material.
Dependencies are inferred from the claim text.