POWER SUPPLY DEVICE

• Main Authors: TAJIMA DAISUKE, KAWABATA TOSHIHIKO
• Format: Patent
• Language: English; Japanese
• Published: 07.01.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a power supply device having high electromotive force.SOLUTION: A metal air battery that is a power supply device includes a positive electrode 14 with oxygen as a positive electrode active material, a negative electrode 16 with a metal as a negative electrode active material, and a high polymer electrolytic material 12 that is interposed between the positive electrode 14 and the negative electrode 16 and holds water to make gel. The positive electrode 14 has a positive electrode material 17 in which a basic functional group can be formed on a surface by contact with water, or a positive electrode material 17 having a basic functional group on a surface thereof. An amount of the basic functional group formed on the surface of the positive electrode material 17 by the contact with water and an amount of the basic functional group provided on the surface of the positive electrode material 17 are 0.036% or more. Further, the positive electrode 14 has an exposed surface 14b exposed to the atmosphere, and is formed so as to be capable of taking in oxygen in the atmosphere from the exposed surface 14b by the positive electrode material 17.SELECTED DRAWING: Figure 1 【課題】起電力が高い電源デバイスを提供する。【解決手段】電源デバイスである金属空気電池は、酸素を正極活物質とする正極１４と、金属を負極活物質とする負極１６と、正極１４及び負極１６の間に介在し且つ水を保持してゲル状をなす高分子電解質１２と、を備えている。正極１４は、水との接触により表面に塩基性官能基が生成し得る正極材料１７、又は、表面に塩基性官能基を備える正極材料１７を有する。水との接触により正極材料１７の表面に生成する塩基性官能基の量、及び、正極材料１７が表面に備える塩基性官能基の量は、０．０３６％以上である。また、正極１４は、大気に露出する露出面１４ｂを有し、正極材料１７によって露出面１４ｂから大気中の酸素を取り込み可能に形成されている。【選択図】図１