WATER BARRIER SODIUM ION CONDUCTIVE FILM AND SODIUM BATTERY

• Main Authors: MAEDA KAZUYUKI, INAZAWA SHINJI
• Format: Patent
• Language: English; Japanese
• Published: 20.07.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOUNDS THEREOF; CONDUCTORS; ELECTRICITY; INORGANIC CHEMISTRY; INSULATORS; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

PROBLEM TO BE SOLVED: To provide a sodium ion conductive film excellent in water barrier property and a sodium ion secondary battery exhibiting high electromotive force while suppressing electrolysis of water contained in an electrolyte.SOLUTION: There is provided a water barrier sodium ion conductive film containing a connected body of particles of a solid electrolyte having sodium ion conductivity and an aliphatic hydrocarbon compound having 20 or more carbon atoms, where a part of the connected body is exposed to both main surfaces of the film and the aliphatic hydrocarbon compound is filled in a gap obtained by the connected body. There is provided a solution electrolyte sodium ion secondary battery containing a cathode, an anode, a solution electrolyte containing a sodium ion and the water barrier sodium ion conductive film arranged between the anode and the solution electrolyte.SELECTED DRAWING: Figure 1 【課題】遮水性に優れるナトリウムイオン伝導膜、および、電解質に含まれる水の電気分解を抑制しつつ、高い起電力を発現するナトリウムイオン二次電池を提供する。【解決手段】ナトリウムイオン伝導性を有する固体電解質の粒子の連結体と、炭素数２０以上の脂肪族炭化水素化合物と、を含む膜であって、前記連結体の一部が、前記膜の両方の主面に露出しており、前記脂肪族炭化水素化合物が、前記連結体が有する空隙に充填されている、遮水性ナトリウムイオン伝導膜。また、正極と、負極と、ナトリウムイオンを含む水溶液電解質と、前記負極と前記水溶液電解質との間に配置された、上記遮水性ナトリウムイオン伝導膜と、を含む、水溶液電解質ナトリウムイオン二次電池。【選択図】図１