Nonaqueous secondary battery
AssigneeFuji Photo Film Co., Ltd.
InventorsYoshikatsu Kagawa, Shoichiro Yasunami, Yukio Maekawa
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Abstract
A nonaqueous secondary battery comprises an anode active material comprising a carbonaceous material, an electrolyte and a cathode active material comprising a lithium-containing transition metal chalcogenide. The carbonaceous material is obtained by burning a polyacrylonitrile fiber and has length of a crystallite in the c-axis direction of 75 to 250 .ANG. and an interval of 002 faces of 3.41 to 3.44 .ANG., the length and the interval being determined from an X-ray diffraction spectrum thereof using a Cu-K.alpha. ray.
Claims6
A nonaqueous secondary battery which comprises an anode active material comprising a carbonaceous material, an electrolyte and a cathode active material comprising a lithium-containing transition metal chalcogenide;
- wherein said carbonaceous material is a carbonized polyacrylonitrile obtained by burning polyacrylonitrile fiber of 0.4 to 40 denier at 2,400.degree. to 3,500.degree. C., said polyacrylonitrile fiber consisting essentially of a polyacrylonitrile or a copolymer of acrylonitrile and other monomers polymerizable with acrylonitrile, and wherein said carbonaceous material has length of a crystallite in c-axis direction of 75 to 250 .ANG. and an interval of 002 faces of 3.41 to 3.44 .ANG., said length and said interval being determined from an X-ray diffraction spectrum thereof using Cu-K.alpha. ray.
Dependencies are inferred from the claim text.