Back to results
US 11,901,559 B2Granted
Anode electrode compositions and aqueous dispersions for battery applications
AssigneeCabot Corporation
InventorsAndriy Korchev, Yilun Tang
Life of this patent
Estimating the term…
Abstract
Carbon nanostructures are used to prepare electrode compositions for lithium ion batteries. In one example, carbon nanostructures, fragments of carbon nanostructures and/or fractured carbon nanotubes are provided in an aqueous dispersion that can be used in the manufacture of silicon-containing anodes. The aqueous dispersion can further include another conductive carbon additive such as carbon black.
Claims18
An aqueous dispersion, comprising:
- a dispersant,
- water, and
- carbon nanostructures, fragments of carbon nanostructures and/or fractured multiwall carbon nanotubes,
- 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 content of carbon nanostructures, fragments of carbon nanostructures and/or fractured multiwall carbon nanotubes is from about 0.2 to about 1.5 wt %, and the dispersion is stable against sedimentation for at least 4 weeks.
3 more elements
A method for preparing an anode composition, the method comprising:
- forming an aqueous dispersion that includes a dispersant, carbon nanostructures, fragments of carbon nanostructures and/or fractured multiwall carbon nanotubes, wherein the content of carbon nanostructures, fragments of carbon nanostructures and/or fractured multiwall carbon nanotubes in the aqueous dispersion is from about 0.2 to about 1.5 wt %, and the aqueous dispersion is stable against sedimentation for at least 4 weeks;
- and
- combining the aqueous dispersion with an anode active material to form the anode 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 multiwall fractured carbon nanotubes are derived from carbon nanostructures and are branched and share common walls with one another.
2 more elements
Dependencies are inferred from the claim text.