LITHIUM AIR BATTERY AND USING METHOD THEREOF

• Main Authors: OTSUKA TOMO, SAWADA KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 23.08.2018
• 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 lithium air battery which is improved in charge/discharge cycle characteristics while ensuring a high capacity.SOLUTION: A lithium air battery 1 herein disclosed comprises: a negative electrode 12 including a negative electrode layer 12a capable of occluding and releasing lithium ions; a positive electrode 13 including a carbon-containing conductive porous body, and a positive electrode layer capable of oxidizing and reducing oxygen in the air as a positive electrode active material; and a nonaqueous lithium ion conductor (e.g. an electrolyte layer 14) disposed between the negative electrode 12 and the positive electrode 13. In the positive electrode layer, a first pore volume occupied by pores of 1 nm or more and 200 nm or less in pore size is larger than a second pore volume occupied by pores of over 200 nm up to 10000 nm in pose size.SELECTED DRAWING: Figure 1 【課題】高容量を確保しつつ、充放電サイクル特性の向上したリチウム空気電池を提供する。【解決手段】本開示のリチウム空気電池１は、リチウムイオンを吸蔵放出可能な負極層１２ａを含む負極１２と、炭素を含む導電性多孔質体を含み、かつ空気中の酸素を正極活物質として該酸素を酸化還元可能な正極層を含む正極１３と、前記負極１２と前記正極１３との間に配置された非水系リチウムイオン伝導体（例えば電解質層１４）と、を備えている。前記正極層において、１ｎｍ以上２００ｎｍ以下の孔径を有する細孔の占める第１細孔容積は、２００ｎｍを超え１００００ｎｍ以下の孔径を有する細孔の占める第２細孔容積よりも大きい。【選択図】図１