Nanoporous separators for batteries and related manufacturing methods
Provided is a lithium battery, wherein the battery comprises an anode, a cathode, wherein the cathode comprises one or more transition metals, an electrolyte, and a porous separator interposed between the cathode and anode, wherein the separator comprises an anionic compound. Also provided are methods of manufacturing such batteries.
1. A free-standing separator for a lithium battery, comprising:
a porous separator layer, comprising slit edges, and which comprises:
one or more inorganic oxides or nitrides;
a polymer binder; and
a reinforcement area comprising polymer disposed on at least one of the slit edges of the porous separator layer, such that the polymer does not entirely cover a full width of the porous separator layer, wherein the reinforcement area comprises a layer comprising the polymer overlying the porous separator layer.
2. The separator of claim 1 , wherein at least a portion of the polymer comprised in the reinforcement area is impregnated in at least a portion of pores of the porous separator layer.
3. The separator of claim 1 , wherein the layer ef comprising the polymer is laminated to the porous separator layer at the reinforcement area.
4. The separator of claim 1 , wherein the reinforcement area comprises a plurality of portions disposed along two opposing slit edges of the porous separator layer.
5. A lithium battery comprising:
an anode,
a cathode, wherein the cathode comprises one or more transition metals,
an electrolyte, and
a porous separator interposed between the cathode and the anode,
wherein the porous separator comprises slit edges and comprises:
one or more inorganic oxides or nitrides, including boehmite;
a polymer binder; and
a reinforcement area comprising a polymer disposed on at least one of the slit edges of the porous separator, such that the polymer does not entirely cover a full width of the porous separator, wherein the reinforcement area comprises a layer comprising the polymer overlying the porous separator.
6. The lithium battery of claim 5 , wherein the anode comprises lithium metal.
7. The lithium battery of claim 5 , wherein the cathode comprises one or more transition metals selected from the group consisting of manganese, nickel and cobalt.
8. The lithium battery of claim 5 , wherein the polymer comprised in the reinforcement area is impregnated in at least a portion of pores of the porous separator.
9. The lithium battery of claim 5 , wherein the layer comprising the polymer is laminated to the porous separator at the reinforcement area.
10. The lithium battery of claim 5 , wherein the reinforcement area comprises a plurality of portions disposed along two opposing slit edges of the porous separator.
11. The free-standing separator of claim 1 , wherein the one or more inorganic oxides or nitrides includes boehmite.