Totally-solid lithium secondary battery
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazunori Takada, Kazuya Iwamoto, Shigeo Kondo
Life of this patent
Estimating the term…
Abstract
A totally-solid lithium secondary battery can be improved in charge and discharge characteristics by adding to the negative electrode a first transition metal chalcogenide or lithium•transition metal chalcogenide which acts as the active material for negative electrode and a second transition metal chalcogenide or lithium•transition metal chalcogenide which inhibits precipitation of metallic lithium.
Claims14
A totally-solid lithium secondary battery which comprises a positive electrode, an electrolyte comprising mainly a sulfide based lithium ion conductive inorganic solid electrolyte comprising mainly a sulfide, and a negative electrode containing (a) at least one first transition metal chalcogenide or lithium transition metal chalcogenide and (b) at least one second transition metal chalcogenide or lithium transition metal chalcogenide, and in which oxidation-reduction potential of said second transition metal chalcogenide or lithium transition metal chalcogenide is lower than that of said first transition metal chalcogenide or lithium transition metal chalcogenide in the operation of charging and discharging of the totally-solid lithium secondary battery.
A totally-solid lithium secondary battery which comprises a positive electrode, an electrolyte comprising mainly a sulfide based lithium ion conductive inorganic solid electrolyte comprising mainly a sulfide, and a negative electrode containing (a) at least one first transition metal chalcogenide or lithium transition metal chalcogenide and (b) at least one second transition metal chalcogenide or lithium transition metal chalcogenide, and in which said first transition metal chalcogenide or lithium transition metal chalcogenide performs an oxidation-reduction reaction and said second transition metal chalcogenide or lithium-transition metal chalcogenide shows a mixed conductivity of electron-lithium ion in the operation of charging and discharging of the totally-solid lithium secondary battery.
Dependencies are inferred from the claim text.