JPS62294145A - Metallic alloy for hydrogen storage containing rare earth element and nickel - Google Patents

Metallic alloy for hydrogen storage containing rare earth element and nickel

Info

Publication number
JPS62294145A
JPS62294145A JP13631886A JP13631886A JPS62294145A JP S62294145 A JPS62294145 A JP S62294145A JP 13631886 A JP13631886 A JP 13631886A JP 13631886 A JP13631886 A JP 13631886A JP S62294145 A JPS62294145 A JP S62294145A
Authority
JP
Japan
Prior art keywords
hydrogen storage
rare earth
nickel
alloy
earth elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13631886A
Other languages
Japanese (ja)
Inventor
Hideo Toma
東馬 秀夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Santoku Corp
Original Assignee
Santoku Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Santoku Corp filed Critical Santoku Corp
Priority to JP13631886A priority Critical patent/JPS62294145A/en
Publication of JPS62294145A publication Critical patent/JPS62294145A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a metallic alloy for hydrogen storage excellent in the amount of hydrogen occlusion, plateau characteristic, and plateau pressure and reduced in hysteresis, by constituting an alloy containing rare earth elements and nickel of a specific nonstoichiometric composition. CONSTITUTION:The metallic alloy for hydrogen storage containing rare earth elements and nickel has a nonstoichiometric composition represented by a formula RNi3.5-4.5M1.0-0.5 (where R means rare earth elements and M means metals other than rare earth elements and nickel). As the above R, La, Ce, Nd, Pr, Sm, etc., and mixtures thereof can be used. Moreover, Al, Mn, Fe, Co, Cr, Cu, etc., are suitably used as the above third metal M. The above alloy can be obtained by blending R, Ni, and M in the above prescribed compositional ratio, by melting the resulting mixture under the inert atmosphere of Ar, etc., by the use of an arc furnace, a high-frequency furnace, etc., at about 1,300-3,000 deg.C, by solidifying the molten metal by allowing it to stand to be cooled, and by crushing the above to about rice-grain size-100 mesh.

Description

【発明の詳細な説明】 3、発明の詳細な説明 本発明は水素吸蔵合金に関し、更に詳細には希土類元素
及びニッケルを含む水素吸蔵合金に関する。
Detailed Description of the Invention 3. Detailed Description of the Invention The present invention relates to a hydrogen storage alloy, and more particularly to a hydrogen storage alloy containing a rare earth element and nickel.

〈従来の技術及び問題点〉 従来、希土類元素、ニッケルの他にアミニウム。<Conventional technology and problems> Conventionally, in addition to rare earth elements and nickel, aminium has been used.

マンガン、鉄、コバルト、銅、クロム等の第3金属元素
を加えた場合の水素吸蔵合金の合金組成としてはRN 
l 5−X M X (式中、Rは希土類元素。
The alloy composition of a hydrogen storage alloy when a third metal element such as manganese, iron, cobalt, copper, or chromium is added is RN.
l 5-X M X (wherein, R is a rare earth element.

Mは希土類元素及びニッケル以外の他の金属元素を示す
)にて表わされる化学量論組成を用いていたが、水素吸
蔵量は必ずしも満足されるものではなく、且つプラトー
性も劣るものであった。
The stoichiometric composition expressed by M (representing a rare earth element and a metal element other than nickel) was used, but the hydrogen storage capacity was not necessarily satisfactory and the plateau property was also poor. .

〈発明の[1的〉 本発明によれば、水素吸蔵量を満足する値に維持すると
共にプラトー性も良好であり、しかも従来より高いプラ
トー圧を得ることのできる水素吸蔵合金を提供す、るこ
とを目的とする。
<Object 1 of the Invention> According to the present invention, there is provided a hydrogen storage alloy that maintains the hydrogen storage amount at a satisfactory value, has good plateau properties, and can obtain a higher plateau pressure than conventional ones. The purpose is to

く問題点を解決するための手段〉 本発明によれば、希土類元素及びニッケルを含む水素吸
蔵合金において、 RN l 3.5〜4.。M□、。〜。、。
Means for Solving Problems> According to the present invention, in a hydrogen storage alloy containing a rare earth element and nickel, RN l is 3.5 to 4. . M□,. ~. ,.

(式中、Rは希土類元素、Mは希土類元素及びニッケル
以外の他の金属を示す)に表わされる非化学量論組成を
有することを特徴とする水素吸蔵合金が提供される。
A hydrogen storage alloy is provided which is characterized by having a non-stoichiometric composition represented by the formula (wherein R is a rare earth element, and M is a rare earth element and a metal other than nickel).

以下、本発明につき更に詳細に説明する。The present invention will be explained in more detail below.

本発明の水素吸蔵合金は。The hydrogen storage alloy of the present invention is.

RNi、RNi3.5〜4.0M4 + OM 1 +
。〜。、Sにて示され非化学量論組成を有することを特
徴とする。すなわち、RNi、、、Ml、。乃至RNi
4.。Mo、、にて示されるように希土類元素、ニッケ
ル以外の第3金JX(M)を化学量論組成よりも少ない
非化学量論組成とすることにより、驚くべきことに水素
吸蔵量、ヒステリシス、プラトー性、プラトー圧が共に
バランスされた良好な結果を得ることができる。
RNi, RNi3.5~4.0M4 + OM 1 +
. ~. , S and is characterized by having a non-stoichiometric composition. That is, RNi,,,Ml,. ~RNi
4. . As shown in Mo, , by making tertiary gold JX (M), which is a rare earth element other than nickel, to have a non-stoichiometric composition that is less than the stoichiometric composition, surprisingly, the hydrogen storage capacity, hysteresis, Good results with well-balanced plateau properties and plateau pressure can be obtained.

RN i 、、sMl、、において第3金属元素(M)
の原子比が1.0を超えるとプラトー性が極端に悪くな
る。また一方RNi、、。M、、、において第3金属元
素(M)が0.5未満となると、水素吸蔵量が少なくな
り、ヒステリシスも大きくなる。
The third metal element (M) in RN i , sMl, .
When the atomic ratio exceeds 1.0, the plateau property becomes extremely poor. On the other hand, RNi... When the third metal element (M) is less than 0.5 in M, . . . , the amount of hydrogen storage decreases and the hysteresis also increases.

本発明の水素吸蔵合金において用いることのできる希土
類元素(R)としては、ランタン(La)。
A rare earth element (R) that can be used in the hydrogen storage alloy of the present invention is lanthanum (La).

セリウム(Ce)、ネオジム(Nd)、プラセオジム(
Pr)、サマリウム(Sm)等及びこれらの混合物を挙
げることができる。希土類元素を種々変えることにより
広い範囲でプラトー性が良く、ヒステリシスが小さく、
しかも水素吸蔵量が大なる水素吸蔵合金が得られる。
Cerium (Ce), Neodymium (Nd), Praseodymium (
Pr), samarium (Sm), etc. and mixtures thereof. By varying the rare earth elements, the plateau property is good over a wide range, and the hysteresis is small.
Furthermore, a hydrogen storage alloy with a large hydrogen storage capacity can be obtained.

本発明の水素吸蔵合金において用いることのできる第3
金属元素(M)としては、アルミニウム(Afl)、マ
ンガン(Mn)、鉄(Fe)、コバルト(Co)、クロ
ム(Cr) 、IR(Cu)等を挙げることができる。
The third material that can be used in the hydrogen storage alloy of the present invention
Examples of the metal element (M) include aluminum (Afl), manganese (Mn), iron (Fe), cobalt (Co), chromium (Cr), and IR (Cu).

これらのうち、コバルト(Co)を用いた場合、バラン
スのとれた特性を有するので好ましい。銅(Cu)を用
いた場合は、COを用いた場合よりプラトー圧が高く、
他のAQ、Mn、Fe、Crを用いた場合はCOを用い
た場合より、プラトー圧が低く、またヒステリシスがC
Oを用いた場合より大きくなり、水素吸蔵量が少し少な
くなる。
Among these, it is preferable to use cobalt (Co) because it has well-balanced characteristics. When using copper (Cu), the plateau pressure is higher than when using CO,
When other AQ, Mn, Fe, and Cr are used, the plateau pressure is lower than when CO is used, and the hysteresis is lower than that when CO is used.
This is larger than when O is used, and the amount of hydrogen storage is slightly smaller.

本発明の水素吸蔵合金を製造するにあたっては。In manufacturing the hydrogen storage alloy of the present invention.

希土類元素(R)、ニッケル(Ni)及び第3金属元素
(M)を前述の非化学量論組成となるよう配合し、アー
ク炉、高周波炉等を用いてアルゴン雰囲気下などの不活
性雰囲気下にて1300〜3000’Ca度にて溶解し
、次いで放冷して得られた合金を米オ′・γ大〜100
メツシュ程度に粉砕するのが望ましい。
A rare earth element (R), nickel (Ni), and a third metal element (M) are blended to have the above-mentioned non-stoichiometric composition, and then heated under an inert atmosphere such as an argon atmosphere using an arc furnace, high frequency furnace, etc. The alloy obtained by melting at 1300 to 3000'Ca degree and then cooling was heated to
It is desirable to crush it to a mesh size.

〈発明の効果〉 本発明の水素吸蔵合金は、水素吸蔵量、プラトー性、プ
ラトー圧のいずれにおいても満足するものが得られ、し
かもヒステリシスが小さいので非常に有用である。
<Effects of the Invention> The hydrogen storage alloy of the present invention is very useful because it provides satisfactory hydrogen storage capacity, plateau properties, and plateau pressure, and has small hysteresis.

〈実施例〉 以下、本発明につきその実施例を挙げて説明する。<Example> Hereinafter, the present invention will be explained by giving examples thereof.

ス】D」1 ミツシュメタル(M m  ランタンとセリウムの混合
物)と、ニッケルとコバルトとを粉砕混合しアーク炉に
入れ、アルゴン雰囲気下に3000℃にて溶解後、1時
間放冷して下記の組成の水素吸蔵合金を製造した。
D''1 Mitsushi metal (a mixture of Mm lanthanum and cerium), nickel and cobalt were pulverized and mixed, placed in an arc furnace, melted at 3000°C under an argon atmosphere, allowed to cool for 1 hour, and the following composition was obtained. A hydrogen storage alloy was manufactured.

MmNi5.?5CO0,7S (Mm 34.62 
wt%、、Ni54.44 wt%、 G o 10.
93 wt%)かようにして得られた水素吸蔵合金を米
粒大に粉砕し定容法にて合金の特性を測定した。その結
果を第1図並びに下記の表に示す。
MmNi5. ? 5CO0,7S (Mm 34.62
wt%, Ni54.44 wt%, G o 10.
(93 wt%) The hydrogen storage alloy thus obtained was ground into pieces the size of rice grains, and the properties of the alloy were measured using a constant volume method. The results are shown in Figure 1 and the table below.

第1図は水素吸蔵量と平衡圧の等温線図で、3O℃及び
10℃におけるそれぞれの水素の吸蔵圧と放出圧を示す
。吸蔵圧と放出圧の差がヒステリシス、平衡圧の平らな
部分がプラトー域で、水素の吸蔵量は、H/Mで表わさ
れる。H/M=1のところで、Mm N i3.、、c
 o。、7sHs、5組成となる。この点での水素吸蔵
量は、1.35wt%となる。
FIG. 1 is an isothermal diagram of hydrogen storage amount and equilibrium pressure, showing the hydrogen storage pressure and release pressure at 30° C. and 10° C., respectively. The difference between the storage pressure and the release pressure is hysteresis, the flat part of the equilibrium pressure is the plateau region, and the amount of hydrogen stored is expressed as H/M. At H/M=1, Mm N i3. ,,c
o. , 7sHs, and 5 compositions. The hydrogen storage amount at this point is 1.35 wt%.

ル1u鉄 実施例1に準じて下記の化学量論組成の水素吸蔵合金を
製造し、実施例1と同様にしてその特性を測定した。そ
の結果を第2図に示す。
A hydrogen storage alloy having the following stoichiometric composition was manufactured according to Example 1, and its properties were measured in the same manner as in Example 1. The results are shown in FIG.

大英例2〜8 実施例1に準じて下記の表の組成の水素吸蔵合金を製造
し、実施例1に記載と同様の手法により特性を測定した
。その結果を表に示す。
Examples 2 to 8 Hydrogen storage alloys having the compositions shown in the table below were manufactured according to Example 1, and their properties were measured using the same method as described in Example 1. The results are shown in the table.

実施例2,4.8については第3図に測定結果を示す。The measurement results for Examples 2 and 4.8 are shown in FIG.

注1)H/M=0.5に於ける絶対工 注2)◎:大大変−0:良い △::通Note 1) Absolute work at H/M=0.5 Note 2) ◎: Very difficult - 0: Good △:: General

【図面の簡単な説明】[Brief explanation of drawings]

第1回は本発明の実施例1の水素吸蔵合金を用いた場合
の水素吸蔵量と平衡圧との関係を示す等温線図、第2図
は比較例による同様の等温線図、第3図は実施例2,4
及び8の水素吸蔵合金を用いた場合の同様の等温線図で
ある。
The first is an isothermal diagram showing the relationship between hydrogen storage amount and equilibrium pressure when using the hydrogen storage alloy of Example 1 of the present invention, Figure 2 is a similar isothermal diagram of a comparative example, and Figure 3 are Examples 2 and 4
and 8 are similar isothermal diagrams when hydrogen storage alloys are used.

Claims (1)

【特許請求の範囲】 希土類元素及びニッケルを含む水素吸蔵合金において、 RNi_3_._5_〜_4_._0M_1_._0_
〜_0_._5(式中、Rは希土類元素、Mは希土類元
素及びニッケル以外の他の金属を示す)に表わされる非
化学量論組成を有することを特徴とする水素吸蔵合金。
[Claims] In a hydrogen storage alloy containing a rare earth element and nickel, RNi_3_. _5_~_4_. _0M_1_. _0_
~_0_. A hydrogen storage alloy characterized by having a non-stoichiometric composition represented by _5 (wherein R is a rare earth element, and M is a rare earth element and a metal other than nickel).
JP13631886A 1986-06-13 1986-06-13 Metallic alloy for hydrogen storage containing rare earth element and nickel Pending JPS62294145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13631886A JPS62294145A (en) 1986-06-13 1986-06-13 Metallic alloy for hydrogen storage containing rare earth element and nickel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13631886A JPS62294145A (en) 1986-06-13 1986-06-13 Metallic alloy for hydrogen storage containing rare earth element and nickel

Publications (1)

Publication Number Publication Date
JPS62294145A true JPS62294145A (en) 1987-12-21

Family

ID=15172412

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13631886A Pending JPS62294145A (en) 1986-06-13 1986-06-13 Metallic alloy for hydrogen storage containing rare earth element and nickel

Country Status (1)

Country Link
JP (1) JPS62294145A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382734A (en) * 1989-08-25 1991-04-08 Nippon Yakin Kogyo Co Ltd Rare earth metal-series hydrogen storage alloy

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6070154A (en) * 1983-09-27 1985-04-20 Japan Metals & Chem Co Ltd Hydrogen storing material
JPS60230950A (en) * 1984-05-01 1985-11-16 Japan Metals & Chem Co Ltd Hydrogen storing material
JPS6191863A (en) * 1984-10-11 1986-05-09 Matsushita Electric Ind Co Ltd Sealed alkaline storage battery
JPS6193556A (en) * 1984-10-12 1986-05-12 Asahi Glass Co Ltd Electrode for battery
JPS61199045A (en) * 1985-02-27 1986-09-03 Chuo Denki Kogyo Kk Hydrogen occluding alloy
JPS61203561A (en) * 1985-03-05 1986-09-09 Matsushita Electric Ind Co Ltd Battery electrode

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6070154A (en) * 1983-09-27 1985-04-20 Japan Metals & Chem Co Ltd Hydrogen storing material
JPS60230950A (en) * 1984-05-01 1985-11-16 Japan Metals & Chem Co Ltd Hydrogen storing material
JPS6191863A (en) * 1984-10-11 1986-05-09 Matsushita Electric Ind Co Ltd Sealed alkaline storage battery
JPS6193556A (en) * 1984-10-12 1986-05-12 Asahi Glass Co Ltd Electrode for battery
JPS61199045A (en) * 1985-02-27 1986-09-03 Chuo Denki Kogyo Kk Hydrogen occluding alloy
JPS61203561A (en) * 1985-03-05 1986-09-09 Matsushita Electric Ind Co Ltd Battery electrode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382734A (en) * 1989-08-25 1991-04-08 Nippon Yakin Kogyo Co Ltd Rare earth metal-series hydrogen storage alloy

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