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US 12,218,340 B2Granted
Alkaline battery and method of producing negative electrode gel for alkaline battery
AssigneeFdk Corporation
InventorsYuya Suzuki, Shigeyuki Kuniya, Takeo Nogami, Shingo Anzai, Shunji Matsui
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Abstract
An alkaline battery and a method of producing an alkaline battery that includes a negative electrode gel in which a negative electrode active material made of a zinc alloy and a binder are dispersed in an alkaline aqueous solution. Ultrafine microfibrils form the binder.
Claims2
An alkaline primary battery having a positive electrode and a negative electrode, the alkaline battery comprising:
- manganese dioxide for a positive electrode active material;
- and
- a negative electrode gel in which a negative electrode active material made of a zinc alloy and a binder are dispersed in an alkaline aqueous solution,
- wherein the binder contains cellulose nanofibers having a diameter of about 3 nm and a length of several μm and polyacrylic acid,
- the cellulose nanofibers having a diameter of about 3 nm are linear fibers to which functional groups are attached and are uniformly dispersed in the negative electrode gel to form a three-dimensional network structure,
- the aqueous solution of the negative electrode gel contains between 0.4 wt % and 0.9 wt % polyacrylic acid, and
- the aqueous solution of the negative electrode gel contains between 0.2 wt % and 0.7 wt % cellulose nanofibers,
- wherein discharge performance of the alkaline battery is improved by at least 8% and the negative electrode gel has a viscosity of 203% or less compared to the same alkaline battery in which the aqueous solution contains no nanofibers.
5 more elements
Dependencies are inferred from the claim text.