| abstract |
(57) [Abstract] [Purpose] The present invention is directed to current efficiency, output characteristics, cycleability, The present invention relates to a new secondary battery having excellent storage characteristics and safety. A secondary battery having at least a positive electrode, a negative electrode, a separator and a non-aqueous electrolyte, wherein the negative electrode active material has a BET specific surface area A (m 2 / g) of 0.1 < A < Crystal thickness Lc in the range of 100 and in X-ray diffraction (Å) and the value of true density ρ (g / cm 3 ) satisfy the following conditions 1.80 <ρ <2.18, 15 <Lc and 120ρ-227 <Lc <120ρ-189 85% by weight to 99% by weight, BET specific surface area A (m 2 / g) 15% by weight of carbonaceous material with A = 0.1-10 A novel secondary battery comprising 1% by weight. |