About 11 results
https://drivepatents.com/patents/1381352 · 23 Apr 2026
A process to make battery-grade graphite from black mass. The process entails spheronizing graphite derived from black mass to yield spheronized graphite, classifying the spheronized graphite to remove conductive carbon fines, and optionally coating the re...
https://drivepatents.com/patents/1400027 · 8 Apr 2026
The present invention relates to a negative electrode active material comprising: artificial graphite particles; and sulfur (S) distributed in the artificial graphite particles, wherein the sulfur content in the negative electrode active material is 15 ppm...
https://drivepatents.com/patents/978565 · 12 Feb 2014
A modified natural graphite material which provides a negative plate having improved adhesion between a negative electrode mixture and a current collector has a circularity of at least 0.92 and at most 1.0 and an incident angle dependence S 60/0 of the pea...
https://drivepatents.com/patents/993049 · 6 Feb 2013
Modified natural graphite particles intended for forming a negative electrode material for a nonaqueous electrolyte secondary battery are characterized by having a circularity of at least 0.93 and at most 1.0 and a surface roughness of at most 1.5% with re...
https://drivepatents.com/patents/1005721 · 1 Feb 2012
To provide a mixed carbon material used for an electrode of a nonaqueous secondary battery with excellent characteristics satisfying both rapid charge-discharge characteristics and high cycle characteristics. A negative electrode material for nonaqueous el...
https://drivepatents.com/patents/1009223 · 28 Sep 2011
The carbon electrode comprises a conical or pyramidal tip (2), which possesses a device for hard-soldering a filament rod and is surrounded at its flanks from a raised edge (3). The raised edge ends above, below or at equal height of the tip of the electro...
https://drivepatents.com/patents/1092017 · 12 Nov 2003
Artificial graphite particles, having a secondary particle structure in which a plurality of primary particles composed of graphite are clustered or bonded together, and having a layer structure in which the edge portion of the primary particles is bent in...
https://drivepatents.com/patents/1097810 · 12 Mar 2003
A material for the negative electrode of a lithium secondary battery is composed of graphite having a particle size up to 100 mu m and being obtained by pulverising natural graphite crystals, at least 80% by weight of the particles having a hexagonal struc...
https://drivepatents.com/patents/1099985 · 4 Dec 2002
Graphite particles having a bent laminate structure inside each particle are produced by feeding, into an impact grinder, graphite particles having an average particle diameter of 5 mm or less together with a gas current to apply an impact to the graphite ...
https://drivepatents.com/patents/1108522 · 21 Nov 2001
The object of the present invention is to provide a carbon material having superior reversibility in lithium intercalation/de-intercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for its negative elect...