Nonaqueous electrolyte secondary battery insulating porous layer
The present invention has an object to provide (i) a nonaqueous electrolyte secondary battery separator having excellent ion permeability and (ii) an insulating porous layer by which to achieve the nonaqueous electrolyte secondary battery separator. The insulating porous layer is a nonaqueous electrolyte secondary battery insulating porous layer containing: a resin A; and a resin B, the resin A and the resin B having therebetween a Hansen solubility parameter distance (HSP distance) (Ra) of not more than 10 MPa 1/2 .
1. A nonaqueous electrolyte secondary battery insulating porous layer comprising:
a resin A; and
a resin B,
the resin A and the resin B being a combination of two kinds of resins that have the greatest total weight of resins contained in the nonaqueous electrolyte secondary battery insulating porous layer,
wherein the resin A and the resin B are each an aromatic polymer; and
the resin A and the resin B having therebetween a Hansen solubility parameter distance (HSP distance) (Ra) of not more than 10 MPa 1/2 .
2. The nonaqueous electrolyte secondary battery insulating porous layer as set forth in claim 1 , wherein the nonaqueous electrolyte secondary battery insulating porous layer has an air permeability of not more than 1000 sec/100 cm 3 .
3. A nonaqueous electrolyte secondary battery laminated separator comprising:
a porous base material containing a polyolefin-based resin as a main component; and
a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1 , the nonaqueous electrolyte secondary battery insulating porous layer being disposed on at least one surface of the porous base material.
4. A nonaqueous electrolyte secondary battery member comprising:
a cathode;
a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1 ; and
an anode,
the cathode, the nonaqueous electrolyte secondary battery insulating porous layer, and the anode being arranged in this order.
5. A nonaqueous electrolyte secondary battery comprising:
a nonaqueous electrolyte secondary battery insulating porous layer recited in claim 1 .
6. A nonaqueous electrolyte secondary battery member comprising:
a cathode;
a nonaqueous electrolyte secondary battery laminated separator recited in claim 3 ; and
an anode,
the cathode, the nonaqueous electrolyte secondary battery laminated separator, and the anode being arranged in this order.
7. A nonaqueous electrolyte secondary battery comprising:
a nonaqueous electrolyte secondary battery laminated separator recited in claim 3 .