Anode electrode compositions for battery applications
AssigneeCabot Corporation
InventorsAndriy Korchev, Kevin Girard, Aurelien L. DuPasquier, Miodrag Oljaca
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Abstract
Carbon nanostructures are used to prepare electrode compositions for lithium ion batteries. In one example, an anode for a Li ion battery includes three-dimensional carbon nanostructures made of highly entangled nanotubes, fragments of carbon nanostructures and/or fractured nanotubes, which are derived from the carbon nanostructures, are branched and share walls with one another. Amounts of carbon nanostructures employed can be less than or equal to 0.5 weight % relative to the weight of the electrode composition.
Claims23
An electrode composition, comprising:
- an active anode material;
- and
- at least one material selected from the group consisting of:
- carbon nanostructures, fragments of carbon nanostructures and fractured multiwall carbon nanotubes,
- wherein the active anode material includes graphite, silicon, SiOx, silicon-graphite composite or lithium titanate
- wherein the carbon nanostructures or fragments of carbon nanostructures include a plurality of multiwall carbon nanotubes that are crosslinked in a polymeric structure by being branched, interdigitated, entangled and/or sharing common walls, and
- wherein the fractured multiwall carbon nanotubes are derived from carbon nanostructures and are branched and share common walls with one another.
A method for preparing an electrode composition, the method comprising:
- combining a dispersion, which includes at least one material selected from the group consisting of carbon nanostructures, fragments of carbon nanostructures and fractured multiwall carbon nanotubes, with an active anode material, to form the electrode composition,
- wherein the carbon nanostructures or fragments of carbon nanostructures include a plurality of multiwall carbon nanotubes that are crosslinked in a polymeric structure by being branched, interdigitated, entangled and/or sharing common walls,
- wherein the fractured multiwall carbon nanotubes are derived from carbon nanostructures and are branched and share common walls with one another, and
- wherein the active anode material includes graphite, silicon, SiOx, silicon-graphite composite or lithium titanate.
A method for preparing an electrode composition, the method comprising incorporating carbon nanostructures in a slurry which includes an active anode material to form the electrode composition,
- wherein the active anode material includes graphite, silicon, SiOx, silicon-graphite composite or lithium titanate, and
- wherein a carbon nanostructure comprises a plurality of multiwall carbon nanotubes that are crosslinked in a polymeric structure by being branched, interdigitated, entangled and/or sharing common walls.
Dependencies are inferred from the claim text.