Carbonaceous electrode material for secondary battery

Details Carbonaceous electrode material for secondary battery Carbonaceous electrode material for secondary battery

H - Electricity

01

M

H01M 4/36 (2006.01) H01B 1/04 (2006.01) H01M 4/96 (2006.01) H01M 4/58 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2116424

A carbonaceous electrode having improved capacities of doping and dedoping a cell active substance, such as lithium, and suitable for a non-aqueous solvent-type secondary battery, is constituted by a carbonaceous material having a specific microtexture. The carbonaceous material is characterized by having an average (002) plane-spacing of at least 0.365 nm according to X-ray diffraction method, and by providing a residual carbonaceous substance showing an average (002) plane-spacing of at most 0.350 nm according to X-ray diffraction method when the carbonaceous material is treated with an H2O-N2 equi-molar gaseous mixture at 900 °C up to a weight reduction of 60 %.

Une électrode carbonée ayant une capacité améliorée pour doper et dédoper une substance active d'une pile, comme le lithium, et appropriée pour une pile secondaire de type solvant non aqueux, est constituée d'une matière carbonée ayant une microtexture spécifique. La matière carbonée se caractérise par un espacement de plan (002) moyen d'au moins 0,365 nm, selon la méthode de diffraction des rayons X, et qu'elle donne une substance carbonée résiduelle ayant un espacement de plan (002) moyen d'au plus 0,350 nm selon la même méthode lorsque la matière carbonée est traitée avec un mélange équimolaire de H2O-N2 gazeux à 900 degrés C jusqu'à une réduction de poids de 60 %.

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