JPH07252560A - Hydrogen storage material - Google Patents
Hydrogen storage materialInfo
- Publication number
- JPH07252560A JPH07252560A JP6068103A JP6810394A JPH07252560A JP H07252560 A JPH07252560 A JP H07252560A JP 6068103 A JP6068103 A JP 6068103A JP 6810394 A JP6810394 A JP 6810394A JP H07252560 A JPH07252560 A JP H07252560A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen storage
- hydrogen
- alloy
- centered cubic
- metals
- 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.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Hydrogen, Water And Hydrids (AREA)
Abstract
(57)【要約】
【目的】 常温で有効に水素吸収、放出することがで
き、しかも優れた水素吸蔵量を示す水素貯蔵材料を提供
する。
【構成】 一般式Ｔｉ100-x-y-zＣｒxＡyＢzで表さ
れ、ＡがＶ，Ｎｂ，Ｍｏ，Ｔａ，Ｗの一種以上、ＢがＺ
ｒ，Ｍｎ，Ｆｅ，Ｃｏ，Ｎｉ，Ｃｕの二種以上からな
り、ｘ、ｙ、ｚが、０＜ｘ＜７０、０＜ｙ＜８０、０＜
ｚ＜２０、ただし０＜ｘ＋ｙ＋ｚ＜１００の範囲内にあ
り、結晶構造が体心立方構造である。さらに結晶の格子
定数ａを、２．９５Å＜ａ＜３．１０Åの範囲内にし、
さらに、隣接する単位格子の体心にある２個の金属と、
この体心間の近接する隅点にある２個の金属にそれぞれ
接する仮想球の大きさを半径で０．３３Å以上にする。
【効果】 常温で優れた水素吸蔵量を得ることがで
き、水素の貯蔵、輸送などを経済的に実用化できる。(57) [Summary] [Objective] To provide a hydrogen storage material capable of effectively absorbing and releasing hydrogen at room temperature and exhibiting an excellent hydrogen storage capacity. [Structure] Represented by the general formula Ti 100-xyz Cr x A y B z , A is one or more of V, Nb, Mo, Ta and W, and B is Z
It is composed of two or more kinds of r, Mn, Fe, Co, Ni and Cu, and x, y and z are 0 <x <70, 0 <y <80 and 0 <.
It is within the range of z <20, but 0 <x + y + z <100, and the crystal structure is a body-centered cubic structure. Further, the crystal lattice constant a is set within the range of 2.95Å <a <3.10Å,
Furthermore, two metals in the body centers of adjacent unit cells,
The size of the phantom spheres in contact with the two metals at the adjacent corner points between the body centers is set to 0.33Å or more in radius. [Effect] An excellent hydrogen storage capacity can be obtained at room temperature, and hydrogen storage and transportation can be economically put into practical use.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水素を高密度でしかも
常温にて可逆的に水素を吸蔵・放出することができる水
素貯蔵材料に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogen storage material capable of storing and releasing hydrogen at a high density and reversibly at room temperature.
【０００２】[0002]
【従来の技術】水素貯蔵材料は、常温、常圧下で液体水
素の水素密度と同等かあるいはそれ以上の密度で水素を
貯蔵できる材料であることから、これまでの液化水素あ
るいは高圧ボンベ方式のように極低温あるいは高圧力を
必要としない優れた水素貯蔵方式を可能にする。さら
に、水素貯蔵材料は、水素と可逆的に反応して、反応熱
の出入りを伴って水素を吸蔵、放出する性質を有してい
る。この反応を利用して水素を貯蔵、運搬する技術の実
用化が図られており、さらに反応熱を利用して水素を熱
貯蔵、熱輸送システムを構築する技術の開発、実用化が
進められている。2. Description of the Related Art A hydrogen storage material is a material capable of storing hydrogen at a density equal to or higher than the hydrogen density of liquid hydrogen at room temperature and atmospheric pressure. It enables an excellent hydrogen storage system that does not require extremely low temperature or high pressure. Further, the hydrogen storage material has a property of reversibly reacting with hydrogen to occlude and release hydrogen as reaction heat comes in and out. Technology for storing and transporting hydrogen using this reaction is being put into practical use, and further the development and practical use of technology for using the reaction heat to thermally store hydrogen and construct a heat transport system. There is.
【０００３】これらの水素貯蔵合金を用いたシステムが
実用化されるか否かは、その水素貯蔵合金の性能、とり
わけ経済性の観点から水素吸蔵量の大小が問題になる。
これまでに、水素貯蔵材料として、Ｌａ−Ｎｉ，Ｍｇ−
Ｎｉ，Ｔｉ−Ｆｅ，Ｍｍ−Ｎｉ，Ｔｉ−Ｍｎ、およびこ
れらの多元化した合金が開発、提唱されており、上記し
た各種用途への応用、実用化が図られている。Whether or not a system using these hydrogen storage alloys is put to practical use depends on the performance of the hydrogen storage alloy, especially from the viewpoint of economy, and the size of the hydrogen storage amount.
So far, as hydrogen storage materials, La-Ni, Mg-
Ni, Ti-Fe, Mm-Ni, Ti-Mn, and multi-component alloys of these have been developed and proposed, and are being applied to various applications and put into practical use.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記した水素
貯蔵材料のうち、Ｍｇ−Ｎｉ合金を除き、いずれもその
水素吸蔵量は最大で２００ｃｃ／ｇ程度である。この程
度の水素吸蔵量は、高圧水素ボンベの水素貯蔵密度と同
程度であり、また反応熱を利用するシステムにおいても
この材料から得られる熱量としては、従来の水素貯蔵合
金を用いないシステムから得られる熱量と同程度であ
る。しかし、水素貯蔵合金の合金コストがまだ高いこと
もあり、上記程度の水素吸蔵量では、水素貯蔵合金を用
いたシステムは経済性から考えて必ずしも優位であると
は言い難い。一方、Ｍｇ−Ｎｉ合金は、４００ｃｃ／ｇ
と優れた水素吸蔵量を示す。しかし、水素吸蔵・放出反
応が遅く、３５０℃以上の高温でなければスムーズに水
素の吸収・放出ができないなどの欠点を有しており、実
用化は難しい。本発明は、上記事情を背景としてなされ
たものであり、常温で可逆的に速やかに水素を吸収・放
出でき、しかも従来材に比べて優れた水素吸蔵量を示す
水素貯蔵材料を提供することを目的とする。However, all of the above hydrogen storage materials except the Mg-Ni alloy have a maximum hydrogen storage capacity of about 200 cc / g. This amount of hydrogen storage is about the same as the hydrogen storage density of a high-pressure hydrogen cylinder, and the amount of heat that can be obtained from this material in a system that uses reaction heat is obtained from a system that does not use a conventional hydrogen storage alloy. It is about the same as the amount of heat generated. However, since the alloy cost of the hydrogen storage alloy is still high, it is hard to say that the system using the hydrogen storage alloy is always superior in view of economical efficiency with the above hydrogen storage amount. On the other hand, Mg-Ni alloy is 400 cc / g
And shows an excellent hydrogen storage capacity. However, it has a drawback that the hydrogen absorption / desorption reaction is slow and the hydrogen cannot be absorbed / released smoothly unless the temperature is higher than 350 ° C., which makes practical application difficult. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a hydrogen storage material capable of reversibly and rapidly absorbing and releasing hydrogen at room temperature and exhibiting a hydrogen storage capacity superior to that of conventional materials. To aim.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明のう
ち、第１の発明の水素貯蔵材料は、一般式Ｔｉ100-x-y-
zＣｒxＡyＢzで表され、ＡがＶ，Ｎｂ，Ｍｏ，Ｔａ，Ｗ
の一種以上、ＢがＺｒ，Ｍｎ，Ｆｅ，Ｃｏ，Ｎｉ，Ｃｕ
の二種以上からなり、ｘ、ｙ、ｚが、０＜ｘ＜７０、０
＜ｙ＜８０、０＜ｚ＜２０、ただし０＜ｘ＋ｙ＋ｚ＜１
００の範囲内にあり、かつ結晶構造が体心立方構造であ
ることを特徴とする。That is, of the present invention, the hydrogen storage material of the first invention is a hydrogen storage material of the general formula Ti 100-xy-
z Cr x A y B z , where A is V, Nb, Mo, Ta, W
One or more of the above, B is Zr, Mn, Fe, Co, Ni, Cu
X, y, and z are 0 <x <70, 0.
<Y <80, 0 <z <20, but 0 <x + y + z <1
And a crystal structure is a body-centered cubic structure.
【０００６】第２の発明は、上記発明において、結晶の
格子定数ａが、２．９５Å＜ａ＜３．１０Åの範囲内に
あり、かつ、隣接する単位格子の体心にある２個の金属
と、この体心間の近接する隅点にある２個の金属にそれ
ぞれ接する仮想球の大きさが、半径で０．３３Å以上で
あることを特徴とする。A second invention is the above invention, wherein the crystal lattice constant a is within a range of 2.95Å <a <3.10Å, and two metal elements located at the body centers of adjacent unit cells are present. The size of the phantom spheres that are in contact with the two metals at the adjacent corner points between the body centers are 0.33Å or more in radius.
【０００７】[0007]
【作用】本発明の合金は、五元系以上の組成から構成さ
れる合金であり、その結晶構造が体心立方構造であるこ
とを特徴としている。体心立方構造とすることによっ
て、従来の水素吸蔵量を飛躍的に増大させることが可能
となった。ここで、Ｃｒの組成比ｘを限定した理由を述
べると、ｘが７０以上では水素吸蔵量そのものがＨ／Ｍ
＝ｌよりも低下し、従来合金よりも水素吸蔵量が低下す
る。ｘが７０未満では、従来合金よりもおおきな水素吸
蔵量を示すが、特にｘが１０＜ｘ＜６０の範囲では、Ｈ
／Ｍ＝１．４以上となり、従来合金と比べて著しく大き
な水素吸蔵量を示すようになる。このため、ｘの組成範
囲を、０＜ｘ＜７０に定めた。望ましくは、１０＜ｘ＜
６０である。The alloy of the present invention is an alloy composed of a quinary or higher composition, and is characterized in that its crystal structure is a body-centered cubic structure. By adopting a body-centered cubic structure, it has become possible to dramatically increase the conventional hydrogen storage amount. Here, the reason why the Cr composition ratio x is limited is as follows. When x is 70 or more, the hydrogen storage amount itself becomes H / M.
= 1 and the hydrogen storage amount is lower than that of the conventional alloy. When x is less than 70, hydrogen storage capacity is larger than that of the conventional alloy, but especially when x is in the range of 10 <x <60, H
/M=1.4 or more, showing a significantly large hydrogen storage amount as compared with the conventional alloy. Therefore, the composition range of x is set to 0 <x <70. Desirably 10 <x <
60.
【０００８】また、Ｔｉ−Ｃｒ系二元合金は、１０００
℃以上の高温で体心立方晶を示す合金であるが、これに
Ａの元素を添加することにより、比較的低温にても体心
立方晶が出現しやすくなり、より簡単な処理により体心
立方晶を作り出すことが可能となる。また、単に体心立
方晶が得られやすくなるばかりではなく、その水素吸蔵
量を飛躍的に増加させる効果も有している。特に、Ａの
中でもＶおよびＭｏにおいてこの効果が著しい。しかし
その組成比ｙが８０以上では、水素吸蔵量は大きいもの
の、水素放出がしずらくなり、可逆的な水素吸・放出量
すなわち有効に利用できる水素吸蔵量が低下する。よっ
て、ｙの組成範囲を０＜ｙ＜８０に定めた。The Ti-Cr binary alloy is 1000
It is an alloy that shows body-centered cubic crystal at high temperature of ℃ or more. By adding element A to this alloy, body-centered cubic crystal is likely to appear even at relatively low temperature. It becomes possible to create cubic crystals. Further, not only is it easy to obtain body-centered cubic crystals, but it also has the effect of dramatically increasing the hydrogen storage amount. In particular, among A, this effect is remarkable in V and Mo. However, when the composition ratio y is 80 or more, although the hydrogen storage amount is large, hydrogen release becomes difficult, and the reversible hydrogen storage / release amount, that is, the hydrogen storage amount that can be effectively used, decreases. Therefore, the composition range of y is set to 0 <y <80.
【０００９】さらに、Ｂの元素の添加は、水素化特性の
中の圧力−組成−等温曲線におけるプラトー性の改善や
平衡解離圧特性の制御に効果を示す。とりわけ、Ｆｅと
他の元素との複合添加は、平衡解離圧特性を常温常圧付
近に保ったまま、プラトー性の改善に大きく寄与する。
しかし、Ｂ元素の組成比ｚが２０以上では、体心立方晶
以外の相が出現しやすくなり、それによって体心立方晶
の有する高吸蔵性の特徴が低下するようになる。このた
め、０＜ｚ＜２０の範囲に限定する。Further, the addition of the element B is effective in improving the plateau property in the pressure-composition-isothermal curve in the hydrogenation characteristics and controlling the equilibrium dissociation pressure characteristics. In particular, the composite addition of Fe and other elements greatly contributes to the improvement of the plateau property while keeping the equilibrium dissociation pressure characteristic at around room temperature and atmospheric pressure.
However, when the composition ratio z of the B element is 20 or more, a phase other than the body-centered cubic crystal is likely to appear, whereby the characteristic of the high storage property of the body-centered cubic crystal is deteriorated. Therefore, the range is limited to 0 <z <20.
【００１０】さらに、本発明の合金が単に体心立方構造
というだけではなく、格子定数ａが、２．９５Å以上か
つ３．１０Å以下の範囲にあり、かつ結晶格子内の空隙
が一定以上の場合に、水素吸蔵量が急激に増大する。す
なわち、格子定数が上記範囲にあっても、水素吸蔵量の
大幅な増加は期待されず、結晶格子内の空隙に配置可能
な仮想球の大きさが半径で０．３３Å以上の場合に水素
吸蔵量が大幅に増大する。この仮想球は、例えば図１に
示すように、隣接する単位格子１、１の体心にある金属
Ｂ１、Ｂ２と、体心間の近接する隅点にある金属Ａ１、
Ａ２間の空隙におかれる仮想的なものであり、各金属に
内接するものである。この０．３３Å以上確保される空
隙に水素が侵入して占有することによって、水素吸蔵量
が大幅に増大することになる。この大きさが０．３３Å
未満であると、空隙への水素の侵入が円滑になされず、
水素吸蔵量の大幅な増大は望めない。Further, when the alloy of the present invention is not only a body-centered cubic structure, but the lattice constant a is in the range of 2.95Å or more and 3.10Å or less and the voids in the crystal lattice are not less than a certain value. Moreover, the hydrogen storage amount rapidly increases. That is, even if the lattice constant is in the above range, a large increase in the hydrogen storage capacity is not expected, and if the size of the virtual sphere that can be placed in the voids in the crystal lattice is 0.33Å or more in radius, the hydrogen storage capacity is increased. The amount increases significantly. For example, as shown in FIG. 1, the phantom sphere includes metal B1 and B2 at the body centers of the adjacent unit lattices 1 and 1, and metal A1 at the close corner points between the body centers.
It is a virtual one placed in the space between A2 and inscribed in each metal. When hydrogen penetrates and occupies the voids that are secured at 0.33 Å or more, the hydrogen storage amount is significantly increased. This size is 0.33Å
If it is less than, the penetration of hydrogen into the void is not smoothed,
A drastic increase in hydrogen storage capacity cannot be expected.
【００１１】[0011]
【実施例】以下に、この発明の実施例（発明材）を、本
発明の範囲外の比較材と比較しつつ説明する。各成分原
料をそれぞれ秤量して、表１に示す組成となるように配
合した。この配合物を、アーク式真空溶解装置の銅製ル
ツボ内に収納し、高純度Ａｒガス雰囲気下でアーク溶解
し、装置内で室温まで冷却して凝固させた。さらに溶解
後、合金の組成を均質化させることと、体心立方晶単相
とする目的で、Ａｒガス雰囲気下において１２００℃か
ら１４００℃の任意の温度にて、約１０時間程度の熱処
理を施した後、直ちに水冷処理を行った。このような処
理を施すことによって、表１に示した本発明材は、いず
れも体心立方晶単相であることを、粉末Ｘ線回折測定に
よる構造解析から確認した。EXAMPLES Examples (invention materials) of the present invention will be described below in comparison with comparative materials outside the scope of the present invention. Raw materials for each component were weighed and blended so as to have the composition shown in Table 1. This compound was housed in a copper crucible of an arc type vacuum melting apparatus, arc melted in a high-purity Ar gas atmosphere, and cooled to room temperature in the apparatus to solidify. Further, after melting, for the purpose of homogenizing the composition of the alloy and making a body-centered cubic single phase, a heat treatment is performed under an Ar gas atmosphere at an arbitrary temperature of 1200 ° C to 1400 ° C for about 10 hours. After that, water cooling treatment was immediately performed. It was confirmed from the structural analysis by powder X-ray diffraction measurement that each of the materials of the present invention shown in Table 1 was a body-centered cubic single phase by performing such a treatment.
【００１２】これらの合金は、大気中で５０〜２００メ
ッシュに粉砕して測定試料とし、各試料５ｇを、水素吸
収・放出量測定装置内のステンレス鋼製反応容器内に封
入した。なお、上記試料を用いて水素吸収・放出特性を
測定する前処理として、初期活性化処理を行った。すな
わち、前記反応容器内を約８０℃に保持したまま、約１
時間真空脱ガス処理を行い、その後反応容器温度を２０
℃まで降下させ、約４０ｋｇｆ／ｃｍ2の高純度水素を
導入した。本発明材の試料は、このような操作によりた
だちに水素を吸収し始めた。水素吸収完了後、容器を８
０℃に加熱しながら真空排気し、前記試料から水素を放
出させ、初期活性化処理を完了させた。次に、反応容器
を再び２０℃に保持し、４０ｋｇｆ／ｃｍ2まで加圧し
水素を吸収させて水素吸蔵量を測定した。These alloys were crushed to 50-200 mesh in the atmosphere to obtain measurement samples, and 5 g of each sample was enclosed in a stainless steel reaction container in a hydrogen absorption / desorption amount measuring device. An initial activation treatment was performed as a pretreatment for measuring hydrogen absorption / desorption characteristics using the above sample. That is, while maintaining the inside of the reaction vessel at about 80 ° C., about 1
Vacuum degassing treatment for 20 hours
The temperature was lowered to 0 ° C., and high-purity hydrogen of about 40 kgf / cm 2 was introduced. The sample of the material of the present invention immediately started to absorb hydrogen by such an operation. After the hydrogen absorption is completed, put the
The sample was evacuated while being heated to 0 ° C. to release hydrogen from the sample, and the initial activation treatment was completed. Next, the reaction vessel was kept at 20 ° C. again, pressurized to 40 kgf / cm 2 to absorb hydrogen, and the hydrogen storage amount was measured.
【００１３】表１は、本発明材および比較材の、結晶構
造と上記水素吸蔵量の測定結果を示す。表から明らかな
ように、本発明材はいずれも体心立方構造を有してお
り、比較材と比較して優れた水素吸蔵量を有していた。
次に、図２は、Ｔｉ−Ｃｒ−Ｖ−Ｆｅ−Ｃｕ五元合金に
おけるＴｉ，Ｃｒ，Ｖの組成比と格子定数および水素吸
蔵量の関係を示す。この図から、格子定数が２．９５Å
以上かつ３．１０Åの場合に、水素吸蔵量が２００ｃｃ
／ｇ以上の優れた値を示している。Table 1 shows the crystal structures of the materials of the present invention and the comparative material and the measurement results of the above hydrogen storage capacity. As is clear from the table, each of the materials of the present invention had a body-centered cubic structure and had an excellent hydrogen storage capacity as compared with the comparative material.
Next, FIG. 2 shows the relationship between the composition ratio of Ti, Cr, V in the Ti-Cr-V-Fe-Cu quaternary alloy, the lattice constant, and the hydrogen storage amount. From this figure, the lattice constant is 2.95Å
Above and above 3.10Å, hydrogen storage capacity is 200cc
/ G or more, which is an excellent value.
【００１４】[0014]
【表１】 [Table 1]
【００１５】しかし、格子定数がこの範囲にあっても必
ずしも水素吸蔵量が大きな値を示しているわけではな
い。さらに、格子定数がこの範囲にある合金で、図１の
Ｂ１、Ｂ２の２個の金属と、Ａ１、Ａ２の２個の金属間
の空隙に配置可能な仮想球の大きさと、水素吸蔵量との
関係を図３に示す。この図からわかるように、水素が反
応することによって水素が占有すると考えられる上記空
隙の大きさと水素吸蔵量とは相関関係があり、大きな水
素吸蔵量を示すためには、上記した格子間空隙の大きさ
が０．３３Å以上なければならないことがわかる。However, even if the lattice constant is within this range, the hydrogen storage amount does not always show a large value. Further, with an alloy having a lattice constant in this range, the size of a virtual sphere that can be arranged in the void between the two metals B1 and B2 and the two metals A1 and A2 in FIG. The relationship is shown in FIG. As can be seen from this figure, there is a correlation between the size of the above-mentioned voids that are considered to be occupied by hydrogen due to the reaction of hydrogen with the hydrogen storage amount, and in order to show a large hydrogen storage amount, the above-mentioned interstitial voids It turns out that the size must be 0.33Å or more.
【００１６】[0016]
【発明の効果】以上説明したように、本発明の水素貯蔵
材料によれば、特定組成の五元系以上の材料の結晶構造
を体心立方構造に限定したので、水素吸蔵量が向上し、
水素の貯蔵等のシステムを経済的に実用化することが可
能になる。また、結晶の格子定数および格子位置の金属
間空隙大きさを限定することにより、さらに水素吸蔵量
が増大する効果がある。As described above, according to the hydrogen storage material of the present invention, the crystal structure of a material having a specific composition of quinary or higher is limited to the body-centered cubic structure, so that the hydrogen storage capacity is improved.
It becomes possible to put a system such as hydrogen storage into practical use economically. Further, by limiting the lattice constant of the crystal and the size of the intermetallic void at the lattice position, there is an effect that the hydrogen storage amount is further increased.
【図１】図１は、体心立方晶の結晶構造を示す模式図で
あるFIG. 1 is a schematic diagram showing a crystal structure of a body-centered cubic crystal.
【図２】図２は、格子定数と水素吸蔵量との関係を示す
グラフであるFIG. 2 is a graph showing a relationship between a lattice constant and a hydrogen storage amount.
【図３】図３は、格子位置の金属間空隙大きさと水素吸
蔵量との関係を示すグラフである。FIG. 3 is a graph showing the relationship between the intermetallic gap size at the lattice position and the hydrogen storage amount.
Claims (2)
れ、ＡがＶ，Ｎｂ，Ｍｏ，Ｔａ，Ｗの一種以上、ＢがＺ
ｒ，Ｍｎ，Ｆｅ，Ｃｏ，Ｎｉ，Ｃｕの二種以上からな
り、ｘ、ｙ、ｚが、０＜ｘ＜７０、０＜ｙ＜８０、０＜
ｚ＜２０、ただし０＜ｘ＋ｙ＋ｚ＜１００の範囲内にあ
り、かつ結晶構造が体心立方構造であることを特徴とす
る水素貯蔵材料1. A compound represented by the general formula Ti 100-xyz Cr x A y B z , where A is one or more of V, Nb, Mo, Ta and W, and B is Z.
It is composed of two or more kinds of r, Mn, Fe, Co, Ni and Cu, and x, y and z are 0 <x <70, 0 <y <80 and 0 <.
Hydrogen storage material having z <20, but 0 <x + y + z <100, and having a crystal structure of body-centered cubic structure
３．１０Åの範囲内にあり、かつ、隣接する単位格子の
体心にある２個の金属と、この体心間の近接する隅点に
ある２個の金属にそれぞれ接する仮想球の大きさが、半
径で０．３３Å以上であることを特徴とする請求項１記
載の水素貯蔵材料2. The crystal lattice constant a is 2.95Å <a <
The size of the phantom spheres that are in contact with the two metals that are within the range of 3.10Å and that are in the body centers of the adjacent unit cells and the two metals that are in the adjacent corner points between the body centers The hydrogen storage material according to claim 1, wherein the radius is 0.33Å or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6068103A JP2935806B2 (en) | 1994-03-14 | 1994-03-14 | Hydrogen storage material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6068103A JP2935806B2 (en) | 1994-03-14 | 1994-03-14 | Hydrogen storage material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07252560A true JPH07252560A (en) | 1995-10-03 |
| JP2935806B2 JP2935806B2 (en) | 1999-08-16 |
Family
ID=13364078
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6068103A Expired - Fee Related JP2935806B2 (en) | 1994-03-14 | 1994-03-14 | Hydrogen storage material |
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| Country | Link |
|---|---|
| JP (1) | JP2935806B2 (en) |
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