CARBON MATERIAL AND PRODUCTION METHOD THEREFOR, AND SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR

An object of the present invention is to provide a carbon material that achieves both a high capacity retention rate and a low DCR retention rate even after 500 cycles, and a secondary battery using the same. The gist of the present invention is as follows. A carbon material wherein a number of peaks in the particle size distribution obtained from flow type-particle image analysis is 2 or more, a number of particles Ne calculated by the following formula (1) is 700 or more, and a specific surface area is 10 m2/g or less. A secondary battery including a positive electrode, a negative electrode, and an electrolyte, wherein the negative electrode comprises a current collector and a negative electrode active material layer disposed on the current collector, and wherein the negative electrode active material layer contains this carbon material. Ne=No×F (In formula (1), No is a number of particles of the carbon material obtained from the flow type-particle image analysis. F (%) is a particle frequency of the carbon material having a particle size of less than 3 um obtained from the flow type-particle image analysis.)