Lithium secondary cell

Details Lithium secondary cell Lithium secondary cell

H - Electricity

01

M

H01M 4/66 (2006.01) H01M 4/02 (2006.01) H01M 4/58 (2006.01) H01M 4/64 (2006.01) H01M 4/70 (2006.01) H01M 10/40 (2006.01) H01M 4/62 (2006.01) H01M 6/10 (2006.01)

Patent

CA 2301585

A lithium secondary cell produced by a method comprising forming copper oxide whiskers on the surface of a copper thin sheet on which negative plate active material is stuck, reducing the whole or part of the copper oxide chemically or electrically, and if necessary plating the copper sheet with nickel so as to form acicular projections on the surface. The lithium secondary cell is immune from the disadvantage that conventional lithium secondary cells deteriorate because of the properties of the copper negative plate collector. Further the lithium secondary cell is excellent in charging/discharging cycle characteristics.

L'invention concerne une pile secondaire au lithium, produite par un procédé consistant à former des pointes de contact d'oxyde de cuivre sur la surface d'une feuille mince de cuivre, sur laquelle on a collé un matériau actif de plaque négative; à réduire électriquement ou chimiquement la totalité ou une partie de l'oxyde de cuivre; et le cas échéant, à recouvrir la feuille de cuivre avec du nickel de façon à obtenir des projections aciculaires sur la surface. La pile secondaire au lithium ne présente pas les désavantages des piles secondaires conventionnelles au lithium, du fait des propriétés du dispositif de collecte de plaque négative de cuivre. En outre, la pile secondaire au lithium possède d'excellentes caractéristiques de cycle de chargement/déchargement.

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