WO1996031633A1 - Rare earth metal-nickel hydrogen-occlusion alloy, process for producing the same, and negative electrode of nickel-hydrogen secondary battery - Google Patents
Rare earth metal-nickel hydrogen-occlusion alloy, process for producing the same, and negative electrode of nickel-hydrogen secondary battery Download PDFInfo
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- WO1996031633A1 WO1996031633A1 PCT/JP1996/000916 JP9600916W WO9631633A1 WO 1996031633 A1 WO1996031633 A1 WO 1996031633A1 JP 9600916 W JP9600916 W JP 9600916W WO 9631633 A1 WO9631633 A1 WO 9631633A1
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- alloy
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- hydrogen storage
- negative electrode
- hydrogen
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/383—Hydrogen absorbing alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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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
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention is applied to a hydrogen storage container, a heat pump, a negative electrode material of a nickel hydrogen secondary battery, and the like, whereby a rare earth metal-nickel hydrogen storage exhibiting a high capacity and a long life is achieved.
- the present invention relates to an alloy, a method for producing the same, and a negative electrode for a nickel hydrogen secondary battery.
- negative electrode alloy materials for nickel-hydrogen rechargeable batteries which are currently being mass-produced, La, Ce, Pr, Nd, or a mixture of these elements (mish metal) is an A-size material.
- n i, C o, M n the a 1 AB 5 type alloy having a B site (Te present invention odors, referred to as L a n i 5 type) are mainly used.
- This alloy has a feature that it has a large hydrogen storage capacity as compared with other alloys, and has a hydrogen absorption and desorption pressure at room temperature of 1 to 5 atm, and is easy to use.
- the conventional rare earth gold-nickel alloy having a La Ni 5 type structure has a low initial activity at the time of storing hydrogen, and is required to have an initial hydrogen storage amount of 100%.
- the absorption and release of hydrogen must be performed several to ten or more times.
- this alloy expands and contracts due to absorption and release of hydrogen, it has cracks, and is pulverized, resulting in a disadvantage of deteriorating battery characteristics.
- a rare earth metal-nickel hydrogen storage alloy conventionally used for a negative electrode material of a nickel hydrogen secondary battery has a higher capacity and a longer life. It is rare.
- a roll metal forming apparatus equipped with a single roll or twin rolls is used to supply a molten metal of the rare earth metal-containing alloy to the roll surface and control a cooling rate.
- a method of rapid cooling and solidification There is known a method of rapid cooling and solidification.
- the roll surface roughness of a commonly used roll forming apparatus is such that the maximum height of the surface irregularities (R m consult) is less than several ⁇ in the production of amorphous materials and the like. Or something close to a mirror surface is used.
- the purpose of the present invention is to provide a negative electrode for a nickel-hydrogen rechargeable battery, in particular, compared to a rare earth metal-nickel-hydrogen storage alloy used as a negative electrode material for a conventional nickel-hydrogen rechargeable battery.
- An object of the present invention is to provide a rare earth metal-nickel hydrogen storage alloy and a method for producing the same, which can simultaneously improve all of the initial active battery capacity and battery life.
- Another object of the present invention is to provide a negative electrode for a nickel-hydrogen rechargeable battery having all of the initial high activity, high battery capacity and long life at the same time.
- the present inventor has the antiphase boundaries are not observed at all present in the crystals of the prior art a N i 5 type structure, be present in the crystals of the a N i 5 type single phase structure and a specific composition to be described later composition
- the ability to do this, and the specific distribution of this anti-phase boundary, etc., enhance the initial activity for hydrogen absorption and release, and this boundary is finely divided by hydrogen absorption and release.
- an alloy exhibiting a La Ni 5 type single-phase structure crystal having a specific antiphase boundary can be used to convert a molten alloy having a specific composition into a roll having a specific surface roughness and a specific cooling condition. It has been found that it can be obtained by supplying more and manufacturing to a specific thickness.
- R represents La, Ce, Pr, Nd, or a mixed element thereof
- M represents Co, Al, Mn, Fe, Cu, Zr, Ti, Indicates Mo, Si, V, Cr, Nb, Hf, Ta, W, B, C, or a mixture of these elements, and is represented by 3.5 ⁇ X ⁇ 5, 0 ⁇ y ⁇ 2).
- the crystal in the alloy has a La Ni 5 type single-phase structure, and the antiphase boundary that exists perpendicular to the C axis of the crystal grains in the alloy. 20 nm in C-axis direction A rare earth metal-nickel hydrogen storage alloy containing 5% by volume or more and less than 95% by volume of crystals containing 2 or more and less than 17 crystals per day is provided.
- the alloy melt having the composition A represented by the above formula (1) is cooled at a supercooling degree of 50 to 500 and a cooling rate of 100 to 1 OOOO ⁇ Z seconds.
- the roll surface roughness is such that the average maximum height (R m ,,) of the roll surface irregularities is 30 to 150 ⁇ using a roll forming apparatus. ⁇ 2.0 mm, solidify uniformly, preferably after this solidification, the resulting alloy is heated in vacuum or in an inert atmosphere at a temperature of 800-10000
- the present invention provides a method for producing the rare earth-type nickel hydrogen storage alloy, wherein the method is heated for 1 to 12 hours.
- a negative electrode for a nickel-hydrogen secondary battery including the rare earth-nickel hydrogen storage alloy and a conductive agent as negative electrode materials.
- FIG. 1 is a high-resolution transmission electron micrograph for measuring the abundance ratio of crystal grains having an antiphase boundary in the band-shaped lump prepared in Example 1.
- FIG. 2 is an enlarged photograph of the portion A shown in FIG. 1 for measuring the abundance of the inversion phase boundary contained in the crystal grains of the zonal agglomerate prepared in Example 1. This is a high-resolution transmission electron microscope photograph.
- the hydrogen storage alloy of the present invention has a composition A represented by the above formula (1), the crystal in the alloy has a La Ni 5 type single phase structure, and the C axis of crystal grains in the alloy Rare earth metal-nickel containing at least 5 vol% and less than 95 vol% of crystals containing 2 or more and less than 17 crystals per 2 O nm in the C-axis direction with an antiphase boundary perpendicular to It is an occlusion alloy. If the antiphase boundary present perpendicular to the C axis of the crystal grain is 2 or more and less than 17 per 20 nm in the C axis direction, and the crystal content is less than 5% by volume The initial activation decreases.
- the battery life is shortened when the anode is used as a nickel hydrogen secondary battery.
- the fact that the crystal structure of the alloy is a La Ni 5 type single phase structure can be identified, for example, by creating and analyzing a normal X-ray diffraction diagram.
- the anti-phase boundary was measured using a high-resolution transmission electron microscope with an accelerating voltage of 2 OO kV or more, where an electron beam was incident from the [100] axis of the alloy crystal grains and the magnification was 300,000 or more so
- the abundance of the crystal grains containing the antiphase boundary was measured by using a transmission electron microscope with an acceleration voltage of 200 kV or more at a magnification of 10,000 to 50,000 times (100” This can be done by taking a transmission electron microscope image of the plane and measuring the plane fertility of the crystal containing the antiphase boundary.
- R can be selected from one or more of the rare earth metals of La, Ce, Pr, and Nd. the content of the element, is preferred to rather than L a 2 0 ⁇ 6 0 atom 0/0, 6 0 to 6 0 atomic%, P r O ⁇ 5 0 atom%, and N d 0 ⁇ 5 0 atom% Can be selected as appropriate. Also, misch metal can be used as a raw material.
- the metal related to M may be one kind or a combination of two or more kinds. Combinations of two or more metals can be made as appropriate based on the properties of each metal. In particular,
- C o has the effect of expanding the crystal lattice to lower the equilibrium hydrogen pressure, and the effect of preventing pulverization and improving the life.
- the compounding ratio is such that R is 1 in the formula (the same applies to the following elements), and is preferably from 0.01 to: L.0 atomic ratio, particularly preferably from 0.02 to 0.8. Atomic ratio.
- a 1 has the effect of expanding the crystal lattice to lower the equilibrium hydrogen pressure, and the effect of increasing the hydrogen storage capacity.
- the amount is preferably from 0.1 to 1.0 atomic ratio, particularly preferably from 0.2 to 0.3 atomic ratio.
- M n acts to expand the crystal lattice and lower the equilibrium hydrogen pressure, and hydrogen Has the effect of increasing the amount of occlusion.
- the compounding amount is preferably from 0.1 to 1.0 atomic ratio, particularly preferably from 0.2 to 0.6 atomic ratio.
- F e has the effect of activating the alloy surface and increasing the rate of hydrogen absorption and release.
- the compounding amount is preferably 0.1 atomic ratio or less, particularly preferably 0.01 to 0.03 atomic ratio.
- Cu has the effect of lowering the equilibrium hydrogen pressure by expanding the crystal lattice.
- the compounding amount is preferably from 0.01 to: L. 0 atomic ratio, particularly preferably from 0.05 to 0. .5 atomic ratio.
- Zr has the effect of improving the hysteresis characteristic of the PCT curve (hydrogen dissociation pressure-composition isotherm) and the effect of improving the life by preventing precipitation at the grain boundaries to prevent cracking.
- the compounding amount is preferably not more than 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- T i has the effect of improving the hysteresis characteristics of the PCT curve.
- the compounding amount is preferably not more than 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- Mo has the effect of increasing the activity and increasing the rate of hydrogen absorption and release.
- the compounding amount is preferably not more than 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- the compounding amount is preferably from 0.03 to L: 0.0 atomic ratio, particularly preferably from 0.05 to 0.2 atomic ratio.
- V has the effect of making it easier to generate antiphase boundaries. Its formulation
- the quantity is preferably 0.0 :! It is preferably from 0.5 to 0.5 atomic ratio, particularly preferably from 0.33 to 0.1 atomic ratio.
- the formulation i preferably has an atomic ratio of 0.01 to 0.5, particularly preferably an atomic ratio of 0.1 to 0.3.
- N b has a crack preventing action.
- the compounding amount is preferably from 0.01 to 0.1 atomic ratio, particularly preferably from 0.03 to 0.05 atomic ratio.
- H f has the effect of improving the hysteresis characteristics.
- the amount of the combination is preferably not more than 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- Ta has an effect of improving the hysteresis characteristics.
- the combination * is preferably from 0.01 to 0.1 atomic ratio, particularly preferably from 0.03 to 0.05 atomic ratio.
- W has the effect of increasing the activity and increasing the rate of hydrogen absorption and release.
- the compounding amount is preferably not more than 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- the compounding amount is preferably not more than 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- the compounding amount is preferably at most 0.1 atomic ratio, particularly preferably from 0.01 to 0.03 atomic ratio.
- each raw material of the composition A or Impurities that are inevitably contained during the production of the hydrogen storage alloy and the like may be contained.
- composition A represented by the above formula (1) the following alloy composition or the like can be preferably mentioned.
- the raw material metal mixture blended so as to have the composition A was melted and obtained.
- the alloy melt is cooled to a degree of supercooling of 500 to 500 ° C, a cooling rate of 100 to 100 ° C / sec, preferably 300 to 100 ° C.
- a solid surface is uniformly solidified to a thickness of 0.1 to 2.0 mm using a roll forming apparatus having a roll having a specific surface roughness.
- the degree of undercooling is a value of (melting point of alloy)-(actual temperature of alloy melt below melting point). More specifically, "supercooling" means that even when the alloy melt is cooled to reach the melting point of the alloy, no solidification actually occurs, and the temperature further decreases, and when the nucleation temperature is reached, the alloy melts. A solid phase is formed in the material, that is, crystals are formed and solidified The phenomenon that occurs first.
- Such supercooling control involves, for example, controlling the temperature of the alloy melt prepared using a crucible or the like, and appropriately adjusting the time and speed required for leading to a single roll for solidification. And can be done by If the degree of supercooling and the cooling rate are out of the essential temperature range, an alloy having a La Ni 5 type single phase structure in which a desired inversion phase boundary is precipitated cannot be obtained.
- the roll forming device is a device that includes a single roll or a twin roll, and cools and solidifies an alloy melt on the roll surface.
- the surface roughness of the roll is determined by the roughness of the roll surface, that is, the cut surface when the surface to be measured is cut by a plane perpendicular to the surface of the surface to be measured. Height of contour appearing on
- the average maximum height (Rm.,) is, specifically, defined as the standard length of the roll surface irregularities specified in JISB 0601 (19776), which is 8 mm. Maximum height measured at multiple locations
- the measurement of the average maximum height (Rma Jt ) is based on JISB 0600 In accordance with 1 (19776), it can be measured using a commercially available stylus type or laser sensor type surface roughness meter. Also, in order to impart such surface roughness to the roll, the type of the abrasive grains and the particle size (counter number) of the grinder used for polishing and finishing the roll and the disc are selected. Can be obtained by polishing.
- the La Ni 5 type single-phase structure which is a structural feature of the hydrogen storage alloy of the present invention.
- the mechanism for obtaining the above-mentioned specific antiphase boundary in is not fully understood, but when the average maximum height (R m ,,) is less than 30 ⁇ , the number of crystal nuclei generated is small.
- the resulting alloy structure has a two-phase structure of La Ni 5 type crystal grains and Ce 2 Ni 7 type crystal grains, and is usually a La Ni 5 type single phase structure. Can not be obtained.
- the average maximum height (R m, x) forces if more than 1 5 0 / i in the poor b Lumpur or these peelability solidified alloy flakes, this to produce a substantially alloy And can not.
- the production of the hydrogen storage alloy of the present invention is not limited to the production method using the roll forming apparatus of the present invention, but may be, for example, the same as the surface roughness described above.
- the use of a disc manufacturing apparatus or the like having a controlled surface roughness can also be achieved by cooling and solidifying the alloy melt of the composition A to a specific uniform thickness under the cooling conditions. It is thought that it is possible.
- the melting of the raw material metal mixture For example, vacuum melting, high-frequency melting, or the like can be used, preferably using a crucible, etc., in an inert gas atmosphere or the like.
- the cooling by the degree of supercooling and the cooling rate is preferably performed by, for example, continuously transferring the alloy melt on a single roll or a twin roll of a roll forming apparatus having the surface roughness, preferably or continuously. It is only necessary to supply them and cool them so that the thickness of the obtained master alloy is in the range of 0.1 to 2.0 mm.
- a grinder or the like having the predetermined surface roughness is installed at a desired location on the roll surface of the roll forming apparatus so as to come in contact with the roll surface, and the roll surface is rolled. If a constant surface roughness is maintained at all times during the rotation of the steel, the desired alloy can be obtained continuously, which is very advantageous industrially.
- a raw material metal mixture having a specific composition controlled so as to fall within the range of the composition A is set under cooling conditions corresponding to the composition from the specific range, and has a specific surface roughness.
- a cooling device By using a cooling device, the anti-phase existing in the direction perpendicular to the C-axis of the crystal grains, which is not seen in the La Ni 5 type structure crystal of the conventional hydrogen storage alloy, It is possible to prepare a hydrogen storage alloy containing 5% by volume or more and less than 95% by volume of crystals containing 2 or more and less than 17 crystals per 20 nm in the C-axis direction.
- the roll surface has a surface roughness of an average maximum height (R m ,,) of 30 to 150 ⁇ using a roll forming apparatus of 0.1. ⁇ 2. O mm thickness uniform
- the alloy obtained by solidification at a temperature of 800-10000 in a vacuum or in an inert atmosphere. C, preferably 850-950.
- C by heating for 0.1 to 12 hours, preferably for 4 to 8 hours, the La Ni 5 type lattice and the array of antiphase boundaries become clearer. As a result, an alloy having a reduced lattice strain and an increased hydrogen storage capacity of the hydrogen storage alloy can be obtained.
- the negative electrode for a nickel hydrogen secondary battery of the present invention contains the hydrogen storage alloy and a conductive agent as negative electrode materials.
- the hydrogen storage alloy is preferably used as a pulverized product, and the pulverized particle size is preferably from 20 to: ⁇ ⁇ ⁇ , particularly preferably 40 to 50 ⁇ m. Desirable.
- the alloy is roughly pulverized with a stamp mill or the like, and then mechanically pulverized in a non-oxidizing solvent such as hexane using a device such as a planetary ball mill. This can be done by any method.
- the content ratio of the alloy is preferably from 70 to 95% by weight, particularly preferably from 80 to 90% by weight Jt%, based on the total amount of the negative electrode material.
- the hydrogen storage capacity of the obtained negative electrode is reduced, and it is difficult to achieve a high capacity.
- the content exceeds 95% by weight, the conductivity is lowered and the durability is deteriorated, so that it is not preferable.
- the conductive agent examples include copper, nickel, cobalt, carbon, and the like.In use, the conductive agent is used as a powder having a particle size of about l to 10 / zm. Can be done. The content of the conductive agent is preferably 5 to 20% by weight, particularly preferably 10 to 20% by weight, based on the total amount of the negative electrode material.
- the negative electrode for a nickel hydrogen secondary battery of the present invention may contain a binder in addition to the essential components.
- the binder include 4-fluoroethylene 6-fluorinated propylene copolymer (FEP), polytetrafluoroethylene, phenolic cellulose, etc. Can be mentioned favorably. It is desirable that the content of the binder is less than 10% by weight based on the total amount of the negative electrode material.
- the above-mentioned negative electrode material is prepared by using nickel mesh, nickel or copper exciton metal, nickel or copper non-tin. It can be obtained by, for example, a method of binding and forming on a current collecting substrate such as gum metal, foamed nickel, or wool-shaped nickel.
- the binding can be performed by a roll press method, a molding press method, or the like, and the shape is preferably a sheet or a pellet.
- Got The negative electrode can be used in the same manner as a normal negative electrode for a nickel hydrogen secondary battery to form a secondary battery.
- the hydrogen storage alloy of the present invention includes a crystal having a specific composition and including two or more and less than 17 less antiphase boundaries perpendicular to the C axis of the crystal grains per 20 nm in the C axis direction. Since it contains 50% by volume or more and less than 95% by volume, it exhibits all of the initial high activity, high electric capacity, and long life simultaneously when used as a negative electrode material for nickel hydrogen secondary batteries. Can be done. In the production method of the present invention, such a hydrogen storage alloy can be easily obtained rationally and industrially.
- the negative electrode for a nickel hydrogen secondary battery of the present invention simultaneously exhibits all of the initial high activity, high electric capacity, and long service life, demand can be expected to replace the conventional negative electrode.
- a raw material metal mixture was prepared to have 6.7 parts by weight, Al 1.3 parts by weight, and FeO.27 parts by weight, and was melted in an argon atmosphere in a high-frequency induction melting furnace to form an alloy melt. did. Subsequently, the temperature of the alloy melt was set to 1450, and a single roll was applied under the conditions of a supercooling degree of 150 ° C and a cooling rate of 2000 to 500 ° CZ seconds.
- the powder X-ray diffraction pattern of the obtained alloy was measured with an X-ray diffraction apparatus manufactured by Rigaku Denki Co., Ltd., and it was identified that the alloy had a La Ni 5 type single-phase structure.
- JEL400EX high-resolution transmission electron microscope
- the (100) plane of the alloy was observed and the alloy was found to be perpendicular to the C-axis of the alloy.
- the number of the crystals present around 20 nm of the antiphase boundary and the ratio of the crystal grains having the antiphase boundary contained in the alloy were determined. Table 2 shows the results. Fig.
- FIG. 1 shows the micrograph used to measure the percentage of crystal grains having an antiphase boundary, and the micrograph taken at around 20 nm of the antiphase boundary perpendicular to the C axis of the crystal grains.
- Fig. 2 shows the micrograph used to measure the number of the present.
- A indicates the portion of the micrograph shown in Fig. 2 before magnification
- B indicates the antiphase boundary
- C indicates the C axis of the crystal grain.
- the alloy was coarsely pulverized with a stamp mill and then pulverized in a hexane solvent with a planetary ball mill to an average particle size of 8 ⁇ .
- This electrode was immersed in a 6N (N) KOH solution, a battery was constructed using a mercury oxide reference electrode, and the electrode characteristics were measured using a potentiogalvanostat (Hokuto Denko). did. Table 2 shows the results.
- the initial activity and battery life were measured by repeatedly charging and discharging and when the battery capacity reached a steady state. For the battery life, the capacity at the 100th cycle was compared with the capacity in the steady state.
- a hydrogen storage alloy was produced in exactly the same manner as in Example 1 except that the strip-shaped alloy prepared in Example 1 was heated at 900 ° C. for 4 hours in an argon stream. The same measurement as in Example 1 was performed on a battery manufactured in the same manner as in Example 1 using the obtained hydrogen storage alloy and this alloy. Table 2 shows the results.
- a raw material metal mixture having the composition shown in Table 1 was used as an alloy melt in the same manner as in Example 1.
- the obtained alloy melt was poured into a water-cooled copper mold at a melt temperature of 1450 ° C. by a mold making method to produce an alloy ingot having a thickness of 20 mm.
- the degree of supercooling was about 30 :, and the cooling rate varied from 10 to 500 ° C in the direction of the thickness of the alloy-ingot.
- This alloy lump was placed in a heat treatment furnace and heated at 1000 in an argon stream for 8 hours.
- the obtained heated alloy lumps Is similar to the currently used hydrogen storage alloy for nickel-hydrogen rechargeable batteries.
- the same measurement as in Example 1 was performed on the alloy lump and the battery manufactured in the same manner as in Example 1 using the alloy lump. Table 2 shows the results.
- a hydrogen storage alloy was produced in exactly the same manner as in Example 1 except that the composition of the raw material metal mixture was changed to the composition shown in Table 1. The same measurement as in Example 1 was performed on the obtained alloy and a battery using this alloy. Table 2 shows the results.
- a strip alloy was prepared in the same manner as in Example 3 except that the surface roughness of the single roll was changed to a single roll having an average maximum height (R m,,) of 60 m.
- R m,, average maximum height
- Example 3 The same measurement as in Example 1 was performed on the obtained hydrogen storage alloy and a battery manufactured in the same manner as in Example 1 using this alloy. Table 2 shows the results.
- a band-shaped alloy was produced in the same manner as in Example 4 except that the surface roughness of the single roll was changed to a single roll having an average maximum height (R m ,,) of 120 ⁇ m.
- a hydrogen storage alloy was produced in exactly the same manner as in Example 4, except that the strip-shaped alloy was heated at 900 X: for 4 hours in an argon stream. The obtained hydrogen storage alloy and a battery manufactured using this alloy in the same manner as in Example 1 were used as in Example 1. Various measurements were performed. Table 2 shows the results.
- a hydrogen storage alloy was produced in exactly the same manner as in Example 1 except that the composition of the raw material metal mixture was changed to the composition shown in Table 1.
- the value of X in the formula (1) of this alloy was 5.02 outside the range specified in the present invention.
- the same measurement as in Example 1 was performed on the obtained alloy and a battery using this alloy. Table 2 shows the results.
- a hydrogen storage alloy was produced in the same manner as in Example 1 except that the surface roughness of the single roll was changed to a single roll having an average maximum height (Rm ,,) of 5 / im.
- the same measurement as in Example 1 was performed on the obtained hydrogen storage alloy and a battery manufactured in the same manner as in Example 1 using this alloy. Table 2 shows the results.
- a hydrogen storage alloy was produced in the same manner as in Example 2, except that the surface roughness of the single roll was changed to a single roll having an average maximum height (R m ) of 5 ⁇ .
- the same measurement as in Example 1 was performed on the obtained hydrogen storage alloy and a battery manufactured in the same manner as in Example 1 using this alloy. Table 2 shows the results.
- Example 12 1 1 to 1 2 3 0 LaNis type structure 1.02 1.7 320 95 5 Comparative example 1 o 0 N type structure 0 78 2 2 268 80 6
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Description
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/750,996 US5817222A (en) | 1995-04-03 | 1996-04-03 | Rare earth metal-nickel hydrogen storage alloy, process for producing the same, and anode for nickel-hydrogen rechargeable battery |
KR1019960706885A KR100216305B1 (ko) | 1995-04-03 | 1996-04-03 | 희토류금속-니켈 수소흡장합금,그 제조법 및 니켈수소 2차전지용 음극 |
EP96908336A EP0765947B1 (en) | 1995-04-03 | 1996-04-03 | Rare earth metal-nickel hydrogen storage alloy, process for producing the same, and anode for nickel-hydrogen rechargeable battery |
AT96908336T ATE207132T1 (de) | 1995-04-03 | 1996-04-03 | Seltene erden-nickel wasserstoffeinlagerungslegierung, verfahren zu deren herstellung und negative elektrode einer nickel-wasserstoffsekundärbatterie |
JP53018696A JP3869003B2 (ja) | 1995-04-03 | 1996-04-03 | 希土類金属−ニッケル水素吸蔵合金及びその製造法、並びにニッケル水素2次電池用負極 |
DE69615976T DE69615976T2 (de) | 1995-04-03 | 1996-04-03 | Seltene erden-nickel wasserstoffeinlagerungslegierung, verfahren zu deren herstellung und negative elektrode einer nickel-wasserstoffsekundärbatterie |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP9945695 | 1995-04-03 | ||
JP7/99456 | 1995-04-03 | ||
JP7/262035 | 1995-09-18 | ||
JP26203595 | 1995-09-18 |
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WO1996031633A1 true WO1996031633A1 (en) | 1996-10-10 |
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PCT/JP1996/000916 WO1996031633A1 (en) | 1995-04-03 | 1996-04-03 | Rare earth metal-nickel hydrogen-occlusion alloy, process for producing the same, and negative electrode of nickel-hydrogen secondary battery |
Country Status (8)
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US (1) | US5817222A (ja) |
EP (1) | EP0765947B1 (ja) |
JP (1) | JP3869003B2 (ja) |
KR (1) | KR100216305B1 (ja) |
CN (1) | CN1074467C (ja) |
AT (1) | ATE207132T1 (ja) |
DE (1) | DE69615976T2 (ja) |
WO (1) | WO1996031633A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2001053550A1 (fr) * | 2000-01-20 | 2001-07-26 | Nankai University | Materiau mixte de stockage d'hydrogene constituant un nanotube d'alliage/carbone et son procede de fabrication |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100237322B1 (ko) * | 1995-08-31 | 2000-01-15 | 이노우에 유스케 | 희토류금속-니켈계 수소흡장합금, 그 제조법 및 니켈수소 2차 전지용 음극 |
US6066415A (en) * | 1996-09-12 | 2000-05-23 | Kabushiki Kaisha Toshiba | Hydrogen absorbing electrode and metal oxide-hydrogen secondary battery |
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JP5716969B2 (ja) | 2012-09-27 | 2015-05-13 | 株式会社Gsユアサ | ニッケル水素蓄電池 |
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CN103695719B (zh) * | 2013-11-25 | 2015-11-25 | 李露青 | 一种钪、铬增强的高强度镍铌合金材料 |
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- 1996-04-03 CN CN96190284A patent/CN1074467C/zh not_active Expired - Lifetime
- 1996-04-03 KR KR1019960706885A patent/KR100216305B1/ko not_active IP Right Cessation
- 1996-04-03 WO PCT/JP1996/000916 patent/WO1996031633A1/ja active IP Right Grant
- 1996-04-03 AT AT96908336T patent/ATE207132T1/de not_active IP Right Cessation
- 1996-04-03 EP EP96908336A patent/EP0765947B1/en not_active Expired - Lifetime
- 1996-04-03 JP JP53018696A patent/JP3869003B2/ja not_active Expired - Lifetime
- 1996-04-03 US US08/750,996 patent/US5817222A/en not_active Expired - Lifetime
- 1996-04-03 DE DE69615976T patent/DE69615976T2/de not_active Expired - Lifetime
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WO2001053550A1 (fr) * | 2000-01-20 | 2001-07-26 | Nankai University | Materiau mixte de stockage d'hydrogene constituant un nanotube d'alliage/carbone et son procede de fabrication |
CN1100154C (zh) * | 2000-01-20 | 2003-01-29 | 南开大学 | 储氢合金/碳纳米管复合储氢材料 |
Also Published As
Publication number | Publication date |
---|---|
KR100216305B1 (ko) | 1999-08-16 |
US5817222A (en) | 1998-10-06 |
DE69615976D1 (de) | 2001-11-22 |
CN1149891A (zh) | 1997-05-14 |
JP3869003B2 (ja) | 2007-01-17 |
EP0765947B1 (en) | 2001-10-17 |
ATE207132T1 (de) | 2001-11-15 |
EP0765947A4 (en) | 1998-10-14 |
DE69615976T2 (de) | 2002-04-04 |
KR970703437A (ko) | 1997-07-03 |
EP0765947A1 (en) | 1997-04-02 |
CN1074467C (zh) | 2001-11-07 |
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