Nonaqueous electrolyte rechargeable battery
A nonaqueous electrolyte secondary battery according to the present invention includes: a negative-electrode current collector 16 ; a negative-electrode active material layer 15 provided on the negative-electrode current collector 16 ; a positive-electrode current collector 11 ; a positive-electrode active material layer 12 provided on a face of the positive-electrode current collector 11 opposing the negative-electrode active material layer 15 ; and at least one inorganic insulating layer 13 provided between the positive-electrode active material layer 12 and the negative-electrode active material layer 15 , the at least one inorganic insulating layer 13 being composed of inorganic particles. The inorganic insulating layer 13 contains no binder.
1. A production method for a nonaqueous electrolyte secondary battery, the nonaqueous electrolyte secondary battery including a positive electrode having a positive-electrode active material layer, a negative electrode having a negative-electrode active material layer, and a separator, the method comprising steps of:
(a) jetting an aerosol onto a surface of the separator, the aerosol including inorganic particles dispersed in a gas, thereby forming on the separator a porous inorganic insulating layer that contains no binder and is composed of the inorganic particles; and
(b) forming an electrode group by allowing the separator to be sandwiched by the positive electrode and the negative electrode, accommodating the electrode group in a case, and thereafter filling the case with a nonaqueous electrolyte.
2. The production method of claim 1 , wherein the aerosol contains inorganic particles of one or more materials selected from the group consisting of alumina, mullite, silica, titania and magnesia.
3. The production method of claim 1 , wherein the aerosol contains alumina.
4. The production method of claim 1 , wherein the separator is made of resin.
5. The production method of claim 1 , wherein the separator is made of a polyolefin-type resin.