| 摘要 |
PURPOSE:To establish technology capable of easily increasing the capacity of an electrode for a lithium secondary battery and preventing its deterioration. CONSTITUTION:A carbon material for a lithium secondary battery electrode is manufactured in such a way that a carbon material for a lithium secondary battery electrode obtained by locally placing at least in an insular state copper fine powder whose particle size is preferably 0.01-20mum on the carbon material surface and sintering, a carbon material, and copper fine powder are mixed, then the mixture is baked in a reducing atmosphere or in an inert gas atmosphere at 300-1000 deg.C. A material prepared by sintering copper fine powder having a particle size of 0.2mum on graphite particles having a particle size of tens mum in a insular state is preferable. The carbon material is formed in a sheet and used as a negative electrode. By mixing and sintering copper and the carbon material in a specified condition, the copper is sintered with fine particle form kept, and crystal structure of the carbon material is stabilized coupled with high current collecting effect of the copper. A production process is remarkably simplified. |
