| 摘要 |
PCT No. PCT/JP93/01929 Sec. 371 Date Aug. 23, 1995 Sec. 102(e) Date Aug. 23, 1995 PCT Filed Dec. 28, 1993 PCT Pub. No. WO95/18467 PCT Pub. Date Jul. 6, 1995An anode material consisting of non-graphitizable carbon material obtained by baking carbon precursor is disclosed. In this non-graphitizable carbon material, ratio by weight of carbon Ps in stacking structure determined from diffraction peak originating in (002) crystal lattice plane and X-ray diffraction spectrum components on the lower angle side with respect to the diffraction peak originating in the (002) crystal lattice plane of X-ray diffraction spectrum is smaller than 0.59, or stacking index SI thereof is smaller than 0.76. Moreover, average number of carbon layers nave in stacking structure is smaller than 2.46. Alternatively, when baking temperature is T DEG C. and half width at half maximum of peak appearing in the vicinity of 1340 cm-1 in Raman spectrum is HW, the condition expressed below is satisfied.HW>138-0.06xTThis non-graphitizable carbon material is manufactured by allowing carbon precursor which becomes non-graphitizable carbon by baking to undergo heat treatment at temperature 600 DEG C. or more under inactive gas atmosphere of flow rate of 0.1 ml/sec. or more per carbon precursor 1 g, or to undergo heat treatment at temperature 600 DEG C. or more under the atmosphere of pressure less than 50 kPa. At this time, carbon precursor is mounted in a layered form so that the area in contact with the atmosphere is 10 cm2 or more per 1 Kg.
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