NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

A nonaqueous electrolyte secondary cell comprising a positive electrode, a negative electrode containing a carbonaceous substance capable of absorbing/releasing lithium ions, and a nonaqueous electrolyte containing a nonaqueous solvent. The nonaqueous solvent contains a sulton compound having at least one double bond in a ring. The specific area of the carbonaceous substance measured by the BET method ranges from 1.5 m2/g to 10 m2/g. A peak originating from the interplanar spacing d002 of below 0.336 nm appears when the carbonaceous substance is measured by powder X-ray diffraction. Two peaks in the range from 42.8° to 44.0° and in the range from 45.5° to 46.6° of the angle of diffraction 2Theta are observed when the carbonaceous substance is measured by X-ray diffraction using the CuKalpha line. The intensity ratio of the R value measured by Raman spectrum measurement is 0.3 or more and the area ratio of that is 1 or more. The carbonaceous substance can be a graphite material.