Metal-air battery
A secondary metal-air battery includes a positive electrode, a negative electrode, a nonaqueous electrolyte, an aqueous electrolyte, and a separator, in which the positive electrode is an air electrode, the negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer contains at least one component selected from the group consisting of lithium metal, magnesium, zinc, and aluminum, and the separator is a polymer film having an air permeability of more than 10,000 seconds/100 mL, an ionic conductance of 1×10 −5 S/cm or more, and a water contact angle of 90° or more.
1 . A secondary metal-air battery comprising:
a positive electrode;
a negative electrode;
a nonaqueous electrolyte;
an aqueous electrolyte; and
a separator,
wherein the positive electrode is an air electrode,
the negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector,
the negative electrode mixture layer contains at least one component selected from the group consisting of lithium metal, magnesium, zinc, and aluminum, and
the separator is a polymer film having an air permeability of more than 10,000 seconds/100 mL, an ionic conductance of 1×10 −5 S/cm or more, and a water contact angle of 90° or more.
2 . The secondary metal-air battery according to claim 1 , wherein the polymer film has a change ratio of a contact angle after 1 hour of dropwise addition of water to a contact angle after 10 seconds of dropwise addition of water of less than 10%.
3 . The secondary metal-air battery according to claim 2 , wherein a contact angle of the polymer film measured using dimethyl carbonate is 90° or more.
4 . The secondary metal-air battery according to claim 2 , wherein the polymer film has a change ratio of a contact angle after 1 hour of dropwise addition of dimethyl carbonate to a contact angle after 10 seconds of dropwise addition of dimethyl carbonate of less than 10%.
5 . The secondary metal-air battery according to claim 2 , wherein the polymer film has a meltdown temperature of 300° C. or higher.
6 . The secondary metal-air battery according to claim 2 , wherein a polymer constituting the polymer film contains an aromatic polyamide, an aromatic polyimide, or an aromatic polyamideimide.
7 . The secondary metal-air battery according to claim 1 , wherein a contact angle of the polymer film measured using dimethyl carbonate is 90° or more.
8 . The secondary metal-air battery according to claim 7 , wherein the polymer film has a change ratio of a contact angle after 1 hour of dropwise addition of dimethyl carbonate to a contact angle after 10 seconds of dropwise addition of dimethyl carbonate of less than 10%.
9 . The secondary metal-air battery according to claim 7 , wherein the polymer film has a meltdown temperature of 300° C. or higher.
10 . The secondary metal-air battery according to claim 7 , wherein a polymer constituting the polymer film contains an aromatic polyamide, an aromatic polyimide, or an aromatic polyamideimide.
11 . The secondary metal-air battery according to claim 1 , wherein the polymer film has a change ratio of a contact angle after 1 hour of dropwise addition of dimethyl carbonate to a contact angle after 10 seconds of dropwise addition of dimethyl carbonate of less than 10%.
12 . The secondary metal-air battery according to claim 11 , wherein the polymer film has a meltdown temperature of 300° C. or higher.
13 . The secondary metal-air battery according to claim 11 , wherein a polymer constituting the polymer film contains an aromatic polyamide, an aromatic polyimide, or an aromatic polyamideimide.
14 . The secondary metal-air battery according to claim 1 , wherein the polymer film has a meltdown temperature of 300° C. or higher.
15 . The secondary metal-air battery according to claim 14 , wherein a polymer constituting the polymer film contains an aromatic polyamide, an aromatic polyimide, or an aromatic polyamideimide.
16 . The secondary metal-air battery according to claim 1 , wherein a polymer constituting the polymer film contains an aromatic polyamide, an aromatic polyimide, or an aromatic polyamideimide.