Modified carbon black materials for lithium-ion batteries
AssigneeThe Regents of the University of California
InventorsRobert Kostecki, Thomas Richardson, Ulrike Boesenberg, Elad Pollak, Simon Lux
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Abstract
A lithium (Li) ion battery comprising a cathode, a separator, an organic electrolyte, an anode, and a carbon black conductive additive, wherein the carbon black has been heated treated in a CO2 gas environment at a temperature range of between 875-925 degrees Celsius for a time range of between 50 to 70 minutes to oxidize the carbon black and reduce an electrochemical reactivity of the carbon black towards the organic electrolyte.
Claims6
A lithium (Li) ion battery comprising:
- a cathode;
- a separator;
- an organic electrolyte;
- an anode;
- and
- a carbon black conductive additive, wherein the carbon black has been heated treated in a CO2 gas environment at a temperature range of between 600-1200 degrees Celsius for a time range of between 1 to 120 minutes to oxidize the carbon black surface and reduce an electrochemical reactivity of the carbon black towards the organic electrolyte.
A method of treating carbon black to reduce an electrochemical reactivity of the carbon black towards an organic electrolyte, comprising:
- heat the carbon black in a CO2 gas environment at a temperature range of between 600-1200 degrees Celsius for a time range of between 1 to 120 minutes to oxidize the carbon black surface and reduce the electrochemical reactivity;
- and
- measure the carbon black electrochemical reactivity using a cyclic voltammetry technique to determine an electrochemical current is response to an electrochemical polarization in the voltage range of between 2.5 to 5.0 volts versus a Li/Li+ reference potential, wherein a treated carbon black produces an electrochemical current in a range of between −0.025 and +0.075 mA/cm2 in the voltage range of between 2.5 to 4.75 volts.
Dependencies are inferred from the claim text.