| abstract |
【Task】 An object of the present invention is to provide a lithium secondary battery having improved discharge capacity and cycle life by improving a negative electrode containing a carbonaceous material. [Solution] A lithium secondary battery including a positive electrode 4, a negative electrode 6 including a carbonaceous material that occludes and releases lithium ions, and a non-aqueous electrolyte, The carbonaceous material of the negative electrode 6 contains Si, and has a peak corresponding to d 002 of 0.344 nm or less (provided that the d 002 indicates a spacing between (002) planes) in powder X-ray diffraction, A lithium secondary battery having a true density of 2 g / cm 3 or more. [Selection diagram] Fig. 1 |