Separator, battery and electronic device
A separator which includes a covering layer in which a fine framework of polyolefin resin is coated with a glass layer and an exposed layer in which the polyolefin resin is exposed is provided. A battery is provided having a cathode and an anode, an electrolyte, and a separator where the separator has the covering layer in which the fine framework of polyolefin resin is coated with the glass layer and a method for manufacturing a separator including the step of coating a fine framework of polyolefin resin with the glass layer by applying a precursor containing viscous liquid product which contains only polysilazane compound or a mixture of viscous liquid product which contains only polysilazane compound with polycarbosilazane compound to the polyolefin resin and placing the precursor applied polyolefin resin in a water bath to dry.
1. A separator comprising:
a first layer; and
a second layer,
wherein the second layer includes a resin with a framework structure of 1 μm or less in diameter,
wherein the resin includes an aramid,
wherein a rate of hole area in a surface of the second layer is in the range from 30% to 45%, and
wherein an area density of the second layer is 0.124 mg/cm 2 or more and 0.358 mg/cm 2 or less.
2. The separator according to claim 1 , wherein the second layer further includes glass or PVdF (polyvinilidene fluoride).
3. The separator according to claim 1 , wherein the area density of the second layer is 0.19 mg/cm 2 or more and 0.24 mg/cm 2 or less.
4. A battery comprising:
a cathode;
an anode;
an electrolyte; and
a separator including a first layer and a second layer,
wherein the second layer includes a resin with a framework structure of 1 μm or less in diameter,
wherein the resin includes an aramid,
wherein a rate of hole area in a surface of the second layer is in the range from 30% to 45%, and
wherein an area density of the second layer is 0.124 mg/cm 2 or more and 0.358 mg/cm 2 or less.
5. The battery according to claim 4 , wherein the first layer includes a polyolefin resin.
6. The battery according to claim 4 , wherein the second layer further includes glass or PVdF (polyvinilidene fluoride).
7. The battery according to claim 4 , wherein the area density of the second layer is 0.19 mg/cm 2 or more and 0.24 mg/cm 2 or less.
8. The battery according to claim 4 , wherein an organic solvent is used as a solvent of the electrolyte.
9. The battery according to claim 4 , wherein an open circuit voltage in the fully charged state is within a range of 4.2 V to 4.6 V.
10. An electronic device including the battery according to claim 4 .