NON-AQUEOUS ELECTROLYTE SECONDARY CELL

A solid solution represented by the formula (1): LixMyMz is used as a negative electrode active material for a non-aqueous electrolyte secondary battery comprising a chargeable and dischargeable positive electrode, a non-aqueous electrolyte and a chargeable and dischargeable negative electrode. In the formula (1). M represents at least one element selected from the group consisting of Ti, Zr, Mn, Co, Ni, Cu and Fe, and M represents at least one element selected from the group consisting of Si and Sn, and 0