| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbonaceous negative electrode material for a lithium secondary battery and its manufacturing method with a large charge/discharge capacity in a practical charge/discharge current density and a superior cycle characteristic. SOLUTION: In the carbonaceous negative electrode material for the lithium secondary battery, a laminated weight rate comprising three layers or less is 80% or more in a laminated weight rate distribution of a carbon mesh face, and a weight rate that a mesh face size La is less than 3.8 nm is 77% or more in a carbon mesh face size/weight distribution. The manufacturing method for the carbonaceous negative electrode material for the lithium secondary battery includes a process of obtaining a carbon precursor by reacting pitch or tar and a bifunctional crosslinking agent under an acid catalyst, a process of infusibilizing a mixture of the carbon precursor and one oxidizer from iodine, ammonium peroxodisulfate or potassium dichromate in a non-oxidizing atmosphere, and a process of heating and carbonizing the infusibilized mixture in the non-oxidizing atmosphere. |
