SODIUM MOLTEN SALT BATTERY AND METHOD FOR MANUFACTURING THE SAME

• Main Authors: FUKUNAGA ATSUSHI, ITANI EIKO, NUMATA KOMA, SAKAI SHOICHIRO, NITTA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a sodium molten salt battery arranged to suppress the gas generation caused therein.SOLUTION: A sodium molten salt battery comprises: a positive electrode; a negative electrode; a molten salt electrolyte having sodium ion conductivity; and a battery case. The positive electrode, the negative electrode and the molten salt electrolyte are housed in the battery case. The positive electrode has a positive electrode current collector, and a positive electrode active material layer formed on the surface of the positive electrode current collector. The negative electrode has a negative electrode current collector, and a negative electrode active material layer formed on the surface of the negative electrode current collector. At least one current collector selected from the positive and negative electrode current collectors includes a sheet material including at least aluminum, and a first oxide surface film having a thickness smaller than 100 nm on the surface of the sheet material. 【課題】ナトリウム溶融塩電池の内部で起こるガス発生を抑制する。【解決手段】正極、負極、ナトリウムイオン伝導性を有する溶融塩電解質および電池ケース、を含み、正極、負極および溶融塩電解質は、前記電池ケースに収容されており、正極は、正極集電体および正極集電体の表面に形成された正極活物質層を有し、負極は、負極集電体および負極集電体の表面に形成された負極活物質層を有し、正極集電体および負極集電体から選ばれる少なくとも一方は、少なくともアルミニウムを含むシート材料を含み、シート材料の表面は、厚さ１００ｎｍ未満の第一酸化皮膜を有する、ナトリウム溶融塩電池。【選択図】図５