US 12,218,340 B2
Alkaline battery and method of producing negative electrode gel for alkaline battery
Yuya Suzuki, Tokyo (JP); Shigeyuki Kuniya, Tokyo (JP); Takeo Nogami, Tokyo (JP); Shingo Anzai, Tokyo (JP); and Shunji Matsui, Tokyo (JP)
Assigned to FDK CORPORATION, Tokyo (JP)
Filed by FDK CORPORATION, Tokyo (JP)
Filed on Dec. 17, 2020, as Appl. No. 17/124,505.
Application 17/124,505 is a continuation of application No. PCT/JP2019/024276, filed on Jun. 19, 2019.
Claims priority of application No. 2018-116914 (JP), filed on Jun. 20, 2018.
Prior Publication US 2021/0104734 A1, Apr. 8, 2021
Int. Cl. H01M 4/24 (2006.01); H01M 4/26 (2006.01); H01M 10/26 (2006.01)
CPC H01M 4/244 (2013.01) [H01M 4/26 (2013.01); H01M 10/26 (2013.01)] 2 Claims
OG exemplary drawing
 
1. 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.