US 11,670,758 B2
Negative-electrode composition for alkaline secondary batteries, and alkaline secondary battery negative electrode
Masahiro Serikawa, Tokyo (JP)
Assigned to TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed by TOPPAN PRINTING CO.,LTD., Tokyo (JP)
Filed on Oct. 28, 2020, as Appl. No. 17/83,207.
Application 17/083,207 is a continuation of application No. PCT/JP2019/024677, filed on Jun. 21, 2019.
Claims priority of application No. JP2018-120215 (JP), filed on Jun. 25, 2018.
Prior Publication US 2021/0057724 A1, Feb. 25, 2021
Int. Cl. H01M 4/24 (2006.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/24 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/242 (2013.01) [H01M 4/383 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 10/24 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An alkaline secondary battery comprising a negative electrode comprising a sheet-shaped metal substrate on which a negative-electrode composition is laminated, the negative-electrode composition comprises:
an active material,
a binder resin, and,
an electrically conductive agent containing an electrically conductive carbon material; wherein
when a value of D50 is defined to be an average particle size X and a value of D20 is defined to be a particle size Y in a cumulative particle size distribution obtained by measuring the active material using a laser diffractometry particle size distribution meter, and
the average particle size X is from 8 μm to 10 μm, and the particle size Y is in a range of 30% or more and 70% or less of the average particle size X, and
wherein the active material is a hydrogen storage alloy.