MOLTEN SALT BATTERY

• Main Authors: NOHIRA TOSHIYUKI, FUKUNAGA ATSUSHI, MATSUMOTO KAZUHIKO, ITANI EIKO, HAGIWARA RIKA, NUMATA KOMA, SAKAI SHOICHIRO, NITTA KOJI
• Format: Patent
• Language: English; Japanese
• Published: 18.12.2014
• 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 molten salt battery superior in charge and discharge characteristics.SOLUTION: A molten salt battery comprises: a positive electrode including a positive electrode active material expressed by the general formula, AMFeMPO(where n is 1 or 2; 0≤x≤0.5; 0≤y≤0.5; A represents an alkali metal element; Mrepresents an element other than the alkali metal; and Mrepresents an element other than Fe); a negative electrode including a negative electrode active material; a separator interposed between the positive and negative electrodes; and a molten salt electrolyte. The molten salt electrolyte includes 90 mass% or more of ionic liquid containing a salt of the element A. 【課題】充放電特性に優れた溶融塩電池を提供する。【解決手段】一般式：Ａn(1-x)Ｍ1nxＦｅ1-yＭ2yＰ2Ｏ7（ｎは、１または２であり、０ ｘ ０．５、０ ｙ ０．５であり、Ａは、アルカリ金属元素であり、Ｍ1は、アルカリ金属以外の元素であり、Ｍ2は、Ｆｅ以外の元素である）で表される正極活物質を含む正極と、負極活物質を含む負極と、前記正極と前記負極との間に介在するセパレータと、溶融塩電解質と、を含み、前記溶融塩電解質は、元素Ａの塩を含むイオン液体を９０質量％以上含む、溶融塩電池である。【選択図】図７