| abstract |
(57) Abstract: A metal oxide capable of electrochemically absorbing and releasing alkaline earth metal ions M 12 + (where M 1 is Ba, Sr or Ca) is used as a positive electrode. a positive electrode a material, a negative electrode and the negative electrode material a carbon material capable of electrochemically occluding and releasing the alkaline earth metal ions M 1 2+, M (CF 3 sO 3) 2, M ( A non-aqueous electrolyte comprising PF 6 ) 2 or M (BF 4 ) 2 (where M is the same element as M 1 ) and an organic solvent, wherein a sequestering agent is added to the non-aqueous electrolyte. Has been added. The present invention provides a non-aqueous electrolyte secondary battery that has a large capacity and good storage characteristics and uses alkaline earth metal ions as an ion conduction medium. |