US 2026/0196476 A1 · HYDROGEN STORAGE ALLOY FOR ALKALINE STORAGE BATTERY, ALKALINE STORAGE BATTERY USING SAME FOR NEGATIVE ELECTRODE, AND VEHICLE

Hydrogen storage alloy for alkaline storage battery, alkaline storage battery using same for negative electrode, and vehicle

AssigneesJapan Metals & Chemicals Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Toyota Jidoshokki

InventorsSaki NOTOYAMA, Tomoki SOUMA, Katsuyuki KUDO, Ryoji SUZUKI, Takao SAWA, Masanobu OUCHI, Hiroyuki SASAKI, Ryo EGUCHI, Satoshi KONO, Takeou OKANISHI, Kohei MANRIKI, Tsukasa SUGIE

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Abstract

A hydrogen storage alloy that is used for an alkaline storage battery, and that has a main phase combining crystal structures of an A2B7-type structure, an A5B19-type structure, or an AB3-type structure and is represented by General Formula (1): (La1-a-bYaRb)1-cMgcNidAleCrfFeg (where R and the suffixes a, b, c, d, e, f, and g are as follows: R is one or both of Sm and Ce, 0<a≤0.12, 0≤b≤0.12, 0.13≤c≤0.27, 3.20≤d+e+f+g≤3.75, 0≤e≤0.14, 0≤f≤0.05, and 0≤g≤5 0.35); an alkaline storage battery that uses this alloy for a negative electrode; and a vehicle that has this alkaline storage battery as a source of electricity to be supplied to a motor.

Claims14

Dependent claims

A hydrogen storage alloy used for an alkaline storage battery, characterized in that the hydrogen storage alloy has a main phase combining crystal structures of an A2B7-type structure, an A5B19-type structure, and an AB3-type structure and meets conditions of General Formula (1) below:

where R and the suffixes a, b, c, d, e, f, and g are as follows:
R:
one or both of Sm and Ce,
0
<
a
≤
0
.
1
⁢
2
,
0
≤
b
≤
0
.
1
⁢
2
,
0.13
≤
c
≤
0.27
,
3.2
≤
d
+
e
+
f
+
g
≤
3.75
,
0
≤
e
≤
0
.
1
⁢
4
,
0
≤
f
≤
0.05
,
and
0
≤
g
≤
0
.
3
⁢
5
.

65 more elements

Dependencies are inferred from the claim text.