Hi Stuey,
The Sila anode composition is set out in the claims of this PCT patent application:
SILA NANOTECHNOLOGIES INC
WO2019079652A1 ANODE ELECTRODE COMPOSITION OF LI-ION BATTERY CELL
https://worldwide.espacenet.com/patent/search/family/066171228/publication/WO2019079652A1?q=WO2019079652A11. A Li-ion battery cell, comprising:
anodeand cathode electrodes;
an electrolyte ionically coupling theanodeelectrode and the cathode electrode; and
a separator electrically separating theanodeelectrode and the cathode electrode, wherein theanodeelectrode comprises a metal current collector and an electrode coating,
wherein the electrode coating:
(1) comprises Si-comprising active material particles that exhibit an average particle size in the range from about 0.2 microns to about 10 microns and exhibit a volume expansion in the range of about 8 vol. % to about 180 vol. % during one or more charge-discharge cycles of the Li- ionbatterycell,
(2) exhibits an areal capacity loading in the range of about 3 mAh/cm2 to about 12 mAh/cm2 ,
(3) exhibits a volumetric capacity in the range from about 600 mAh/cc to about 1800 mAh/cc in a charged state of the Li-ionbatterycell,
(4) comprises conductive additive material particles, and
(5) comprises a polymer binder that is configured to bind the Si- comprising active material particles and the conductive additive material particles together to stabilize theanodeelectrode against the volume expansion during the one or more charge-discharge cycles of the Li-ionbatterycell while maintaining an electrical connection between the metal current collector and the Si-comprising active material particles.
... 14. The Li-ionbatterycell of claim 1,
wherein the conductive additive material comprises carbon nanotubes or carbon nanofibers, and
wherein a total content of the conductive additive material is below about 5 wt. % of the electrode coating and/or below about 5 vol. % of the electrode coating.
I guess the formation of the carbon nanotubes or nanofibres is more complex than graphite. Note that claim 1 does not exclude graphite. Nor does claim 1 limit the amount of conductive additive material.
(20min delay)