Graphite particles and lithium secondary cell using them as...

C - Chemistry – Metallurgy – 04 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C04B 35/52 (2006.01) C01B 31/04 (2006.01) H01M 4/02 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2262613

A graphite particle obtained by assembling or binding together a plurality of flat-shaped particles so that the planes of orientation are not parallel to one another, or a graphite particle in which aspect ratio is 5 or less or specific surface area is 8 m2/g or less or the size of crystallite in the direction of c-axis of the crystal is 500 .ANG. or more and the size of crystallite in the direction of plane is 1,000 .ANG. or less as measured by X ray broad angle diffraction, or a graphite particle in which pore volume of the pores having a size falling in a range of 10 2 to 10 6 .ANG. is 0.4 to 2.0 cc/g per weight of graphite particle or pore volume of the pores having a size falling in a range of 1 × 10 2 to 2 × 10 4 .ANG. is 0.08 to 0.4 cc/g per weight of graphite particle is suitable for production of negative electrode of lithium secondary battery, and a lithium secondary battery obtained therefrom is excellent in rapid charge-discharge characteristics, cycle characteristics, etc.

L'invention concerne des particules de graphite lesquelles sont des particules planes regroupées ou combinées de manière que leurs faces d'orientation ne soient pas parallèles mutuellement; des particules de graphite dont le rapport d'allongement n'est pas supérieur à 5, dont l'aire de surface spécifique n'est pas supérieur à 8 m<2>/g, ou dont les crystallites ont une taille non inférieure à 500 ANGSTROM le long de l'axe c et une taille non supérieure à 1000 ANGSTROM dans la direction avant; ou des particules de graphique dont le volume de pores d'une taille comprise entre 10<2> et 10<6> ANGSTROM se situe entre 0,4 et 2,0 cc/g par poids de particules de graphite ou dont le volume de pores présentant une taille comprise entre 1x10<2> et 2x10<4> ANGSTROM se situe entre 0,08 et 0,4 cc/g par poids de particules de graphite. Ces particules de graphite sont adaptées à la production de la cathode d'un élément secondaire au lithium, et un élément secondaire au lithium ainsi fabriqué présente une excellente caractéristique de charge et de cycles rapides, etc.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Graphite particles and lithium secondary cell using them as... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Graphite particles and lithium secondary cell using them as..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graphite particles and lithium secondary cell using them as... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1713055

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.