Powder material, electrode structure, production processes thereof, and secondary lithium battery
AssigneeCanon Kabushiki Kaisha
InventorsTOMOYA YAMAMOTO, SOICHIRO KAWAKAMI, NAOYA KOBAYASHI
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Abstract
Disclosed herein is a powder material comprising a compound which electrochemically intercalates and deintercalates a lithium ion, wherein the powder material is comprised mainly of a compound containing at least an oxygen element, a sulfur element and at least one transition metal element.
Claims33
A powder material comprising a compound which electrochemically intercalates and deintercalates a lithium ion, wherein the powder material is comprised of a compound as a main material, which compound contains at least an oxygen element, a sulfur element and at least one transition metal element.
A process for preparing a powder material comprised mainly of a compound which electrochemically intercalates and deintercalates a lithium ion and contains at least an oxygen element, a sulfur element and at least one transition metal element, the process comprising at least one step selected from a group consisting of:
- I) a step of heating at least one compound (a) selected from a group consisting of carbonates, organic carboxylates, nitrates, hydroxides and oxides of transition metals, and a sulfur compound (b) which forms hydrogen sulfide or sulfur, in a closed vessel;
- II) the step of heating at least one compound (c) selected from a group consisting of sulfides, thiocarbonates, thiosulfates, thiocyanates, thioglicolates and thiourea complexes of transition metals and at least one compound (d) selected from a group consisting of carbonates, carbonic acid, organic carboxylates, organic carboxylic acids, nitrates, nitric acid, hydroxides and oxides, which contains no transition metal element, in a closed vessel;
- and
- III) the step of heating at least one compound (a) selected from a group consisting of carbonates, organic carboxylates, nitrates, hydroxides and oxides of transition metals and at least one compound (c) selected from a group consisting of sulfides, thiocarbonates, thiosulfates, thiocyanates, thioglicolates and thiourea complexes of transition metals in a closed vessel.
A process for producing an electrode structure for a battery utilizing the intercalation and deintercalation reaction of a lithium ion, the process comprising the steps of preparing a powder material which electrochemically intercalates and deintercalates a lithium ion and contains at least an oxygen element, a sulfur element and at least one transition metal element;
- and molding the powder material to obtain an electrode structure.
Dependencies are inferred from the claim text.