Multi-layer battery separator for alkaline battery and method for making
AssigneeSWM Holdings US, LLC
InventorsVincent Motin, Christelle Bellouard, Axel Le Nozahic
Life of this patent
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Abstract
Battery separators and methods of making such separators are provided. The separators can be used in various alkaline batteries such as a Zn/MnO2 battery or the like. An alkaline battery separator comprises a first layer of polyvinyl alcohol fibers, a second layer of cellulose or a cellulose derivative and a third layer comprising a water soluble polymer. The battery separator has reduced pore sizes to reduce clogging, while still maintaining desirable wet ionic resistance, basis weight and absorption performance.
Claims25
An alkaline battery separator comprising:
- a first layer comprising polyvinyl alcohol fibers;
- a second layer comprising cellulose or a cellulose derivative;
- and
- a third layer comprising a water soluble polymer and a microcrystalline cellulose gel.
An alkaline battery separator comprising:
- at least one layer comprising polyvinyl alcohol fibers and a cellulose or a cellulose derivative;
- and
- a coating adhered to the at least one layer comprising a water soluble polymer and a microcrystalline cellulose gel, wherein the alkaline battery separator has a maximum pore size of less than about 1.0 μm.
A method for making an alkaline battery separator, the method comprising:
- forming a first layer comprising polyvinyl alcohol fibers;
- forming a second layer comprising a cellulose or a cellulose derivative;
- and
- coating one of the first or second layers with a third layer comprising a water soluble polymer and a microcrystalline cellulose gel.
Dependencies are inferred from the claim text.