WO2005100250A1 - 正極活物質用マンガン酸化物 - Google Patents
正極活物質用マンガン酸化物 Download PDFInfo
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- WO2005100250A1 WO2005100250A1 PCT/JP2005/000229 JP2005000229W WO2005100250A1 WO 2005100250 A1 WO2005100250 A1 WO 2005100250A1 JP 2005000229 W JP2005000229 W JP 2005000229W WO 2005100250 A1 WO2005100250 A1 WO 2005100250A1
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- manganese oxide
- manganese
- electrolytic
- positive electrode
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Classifications
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/006—Compounds containing, besides manganese, two or more other elements, with the exception of oxygen or hydrogen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- 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 relates to a manganese oxide used as a positive electrode active material of a battery.
- Manganese oxides are widely used as positive electrode active materials such as nickel manganese batteries, alkaline batteries, and manganese lithium batteries. Among them, electrolytic manganese dioxide is relatively inexpensive and can realize a battery with high discharge capacity.Therefore, in recent years, alkaline batteries using this as a positive electrode active material have been used in digital cameras, digital video cameras, mobile phones, PDAs, and the like. It is widely used as a drive power supply for any electronic device.
- Patent Document 1 Japanese Patent Application Laid-Open No. 5-21062 discloses that a manganese dioxide containing ammonia obtained by electrolyzing an electrolytic solution obtained by adding an ammonium salt to a manganese sulfate and sulfuric acid solution is converted to lithium. It has been proposed to use as a positive electrode material for lithium secondary batteries by neutralizing with a salt aqueous solution or by mixing a lithium salt.
- Patent Document 2 JP-A-5-174841 discloses that the molar number of water removed by heat treatment in a range of 120 ° C or more and not more than 400 ° C is 0.16 or more per mole of Mn atom.
- electrolytic manganese dioxide for the positive electrode.
- Patent Document 3 Japanese Patent Application Laid-Open No. 2002-289185 discloses that the maximum particle diameter is 100 ⁇ m or less, the number of particles of 1 ⁇ m or less is less than 15%, and the median diameter is 20 to 60 ⁇ m.
- Electrolytic manganese dioxide powder having a specific surface area of 50 m 2 / g or more measured by a mixed gas adsorption method of nitrogen and helium after degassing the powder in nitrogen at 150 ° C. Propose manganese powder.
- Patent Document 4 Japanese Patent Application Laid-Open No.
- the maximum particle diameter is 100 / im or less, the number of particles of 1 / im or less is less than 15%, and the median diameter is 20-60. / im range, and the half-width of the diffraction surface having a Miller index of (110) is less than 3.5 ° in a measurement using CuKa as an X-ray source.
- Patent Document 5 Japanese Patent Application Laid-Open No. 2002-304990 discloses that a positive electrode mixture for an alkaline manganese battery having improved high-rate intermittent performance has a surface sulfuric acid amount of 0.10% by weight or more, Manganese dioxide having a surface alkali metal content of less than 0.20% by weight is disclosed.
- Patent Document 6 Japanese Patent Application Laid-Open No. 2003-163003 discloses that a specific surface area of electrified manganese dioxide is increased by adding 0.01% to 3.0% by weight of titanium to electrolytic manganese dioxide. To increase the high-rate characteristics by increasing the
- Patent Document 7 Japanese Patent Application Laid-Open No. 2004-47445 discloses an electrolytic manganese dioxide capable of improving high-rate characteristics containing 1.3 to 1.6% by weight of a sulfate group. Have been.
- the present invention has been studied on manganese oxides from a different viewpoint, and has not provided a manganese oxide capable of realizing excellent high-rate characteristics based on new findings obtained as a result thereof. It is assumed that.
- composition formula MnS H Me O ⁇ ⁇ O (where, Me: Ti, Ca, Mg, Ln (Lantanoy a b x c 2
- C) is a manganese oxide represented by one or a combination of two or more), wherein a is not less than 0.005 and not more than 0.015;
- b is not less than 0.3 and not more than 0 ⁇ 5;
- c is 1.8 or more and 2.3 or less
- ⁇ is a manganese oxide characterized by having a value exceeding 0, and particularly preferably Abxc 2 where the ratio b / a of H to S in the composition formula MnS H Me ⁇ ⁇ ⁇ O is 2-100
- a manganese oxide is proposed.
- no rate refers to a high rate in the range of 400 mA or more in the case of, for example, an alkaline battery.
- the characteristics of a current of 400 mA or 1000 mA used in toys, digital cameras, and the like were continuously or intermittently maintained while maintaining a predetermined voltage.
- ⁇ ⁇ in the composition formula MnS H Me O ⁇ ⁇ ⁇ indicates that manganese oxide is 2 ab x c 2 at 110 ° C.
- This “H ⁇ ” is water that can be evaporated by heating and drying at 110 ° C,
- FIG. 1 is a cross-sectional view of an alkaline manganese battery.
- the manganese oxide of the present invention is a manganese oxide represented by a composition formula: MnSHMeO.
- the manganese oxide of the present invention may be any of natural manganese oxide, chemically synthesized manganese oxide, electrolytic manganese oxide, and other manganese oxides as long as the above composition is satisfied. From the viewpoint of easily realizing the above composition, a manganese oxide obtained by producing (precipitating) the manganese sulfate solution by electrolysis is preferable.
- the molar ratio a of S is 0.005 or more and 0.015 or less, and is preferably 0.009 or more and 0.013 or less. If the manganese oxide is produced by an electrolytic method, the molar ratio a of S may be, for example, the design of an electrolytic device (including the upper layer of the electrolytic solution being a high-temperature layer and the lower layer being a low-temperature layer), It can be adjusted by the sulfuric acid concentration, electrolysis conditions, etc.
- the quantification of the S element can be measured using an ICP analyzer.
- “b” as a molar ratio of H is 0.3 or more and 0.5 or less, preferably 0.32 or more and 0.5 or less.
- the molar ratio b of H is, for example, in the case of producing manganese oxide by an electrolytic method, for example, in the design of an electrolytic device (including the upper layer of the electrolytic solution being a high-temperature layer and the lower layer being a low-temperature layer), The ability to adjust by sulfuric acid concentration, electrolysis conditions, etc.
- the amount of water released from the sample when heated from 110 to 500 ° C is measured with a Karl Fischer moisture meter, and based on the obtained amount of water, it is released when heated and dried at 110 ° C. It can be calculated on the basis of the value excluding the amount of water.
- the manganese oxide of the present invention contains both predetermined amounts of "S" and "H", and it is particularly preferable that the amount of H to S be a predetermined ratio. Specifically, it is preferable that the ratio b / a of H to S be 2100, particularly 1060.
- the ratio of H to S, bZa can be determined, for example, in the case of producing manganese oxide by an electrolytic method, for example, by designing the electrolytic apparatus (including making the upper layer of the electrolyte a high-temperature layer and the lower layer a low-temperature layer), It can be adjusted depending on the sulfuric acid concentration, electrolysis conditions, etc.
- c as a molar ratio of ⁇ is 1.8 or more and 2.3 or less.
- the molar ratio c in (2) can be adjusted by changing the contents of S, H and Me.
- Me is one or a combination of two or more of Ti, Ca, Mg, and Ln (lanthanoids), and represents the inevitable impurities contained in the raw material and the intentionally added material. Does not distinguish between them.
- x is such that X is 0 or is greater than 0 and not more than 0.015, preferably not less than 0.00000001 and not more than 0.013, more preferably not less than 0.00001. 0.013 or less.
- Me does not always need to be contained, but if it is contained a little, it acts as a control factor during crystal growth, and the high-rate characteristics can be further improved.
- molar ratio is a value obtained by converting the weight loss when sufficiently dried by heating at 110 ° C into the number of moles of H ⁇ per mole of manganese oxide.
- the peak intensity 1 (130) of the (130) plane and the peak intensity 1 (221) of the (221) plane measured by X-ray diffraction (XRD) are It is preferred that the ratio is 1 (130) Z 221) ⁇ 0.2, especially 0.19, especially 0.18.
- the ratio of the peak intensity 1 (130) to the peak intensity 1 (221) of the (221) plane, which is smaller than 0.2, is an index of how much the crystal structure deviates from ⁇ _ ⁇ , in other words
- the d-spacing of the (110) plane measured by X-ray diffraction (XRD) is equal to or more than 410 A, particularly 4.001 to 4.090, and especially 4.015 to 4. 090, more preferably 4.020-1.090.
- the plane spacing d value of the (110) plane is a value that changes due to the coupling state of Mn and ⁇ . Although the detailed reason is unknown, it has been confirmed that if the d-spacing is 4.001 A or more, the high-rate characteristics are further improved.
- the method for producing a manganese oxide according to the present invention is not particularly limited as long as the manganese oxide is produced so that S, H, and in some cases, Me are contained in predetermined amounts in the manganese oxide.
- a force S that can be produced by a method different from the method described below, for example, a method of electrolyzing an electrolytic solution composed of manganese sulfate and a sulfuric acid solution, A high-temperature upper electrolyte layer and a low-temperature lower electrolyte layer are formed therein, and the manganese oxide of the desired composition is produced by adjusting the electrolytic current density, the sulfuric acid concentration of the electrolytic solution, etc. Power S can.
- this manufacturing method will be described in more detail.
- Titanium, a titanium alloy, a lead plate, a graphite plate, or the like may be used for the anode for the anode, and carbon or the like may be used for the cathode. However, it is not limited to these.
- the temperature of the upper electrolyte layer is preferably 90-100 ° C, and the temperature of the lower electrolyte layer is preferably 60-85 ° C, particularly 65-84 ° C.
- Means for forming the high-temperature upper electrolyte layer and the low-temperature lower electrolyte layer in this manner is not particularly limited, but as an example, the replenisher is sent upward from the bottom of the electrolytic cell.
- the replenisher is sent upward from the bottom of the electrolytic cell.
- the lower end of the electrode immersed in the electrolytic solution is adjusted to just enter the upper electrolytic solution layer, but the present invention is not limited to this.
- the concentration of sulfuric acid in the electrolytic solution is not particularly limited, but is preferably 50 to 100 gZL, particularly preferably 55 to 75 g / L.
- the manganese concentration in the electrolyte is 20-50gZL, especially 30-40g / L Preferably it is.
- the electrolysis current density is preferably from 20 to 100 A / m 2 , particularly preferably from 30 to 70 A / m 2 .
- the liquid sending speed that is, the replenishing speed of the electrolytic solution
- the replenishing speed of the electrolytic solution is set so that the sulfuric acid concentration of the electrolytic solution is maintained at a predetermined concentration.
- a raw material containing a large amount of Me may be selected, or a Me conjugate may be added to the electrolytic solution.
- examples of the Mei conjugate include a sulfate compound, a nitrate compound and a chloride compound. Specifically, it is preferable to dissolve and add these Me compounds to a manganese sulfate solution as a replenishing solution.
- the crushing method is as follows: coarsely crushed by a jaw crusher or the like, crushed into a lump of a few cm, and further crushed by a roller mill or the like to perform fine crushing, and further mortar, wet
- the pulverization may be performed by ball mill pulverization, mill pulverization, dry ball mill pulverization, or the like.
- the classification method employs a method in which manganese oxide powder obtained by milling is dispersed in pure water, and the sedimented powder is filtered and dried to remove fine powder, in addition to using a sieve. S can.
- the manganese oxide powder finely ground in this manner is washed with water or with an alkali, if necessary, to remove free acid remaining on the surface.
- baking and dehydration may be performed after the electrolysis.
- the heat treatment conditions at this time are not particularly limited, for example, firing at about 350 to 400 ° C. for about 114 hours can be performed.
- the manganese oxide of the present invention can be suitably used as a positive electrode active material for nickel manganese batteries, alkaline batteries, manganese lithium batteries, and the like.
- alkaline batteries using this as a positive electrode active material are suitable for use as drive power supplies for electronic devices such as digital cameras, digital video cameras, mobile phones, and PDAs. Let's do it.
- manganese oxide which has been calcined and dehydrated after electrolysis, as described above.
- the negative electrode active material of the battery is conventionally known and is not particularly limited.
- a manganese battery or an alkaline manganese battery zinc or the like is used, and for a lithium battery, lithium or the like is used. Is common.
- the electrolyte constituting the battery is also conventionally known and is not particularly limited, but zinc chloride or ammonium chloride is used for a manganese battery, potassium hydroxide is used for an alkaline battery, and an organic solvent solution of a lithium salt is used for a lithium battery. It is common.
- manganese oxide powder and graphite as a conductive agent are kneaded, and this is compression-molded. Place inside the positive electrode can.
- a negative electrode material made of gelled zinc powder may be provided inside the positive electrode active material via a separator.
- a 5L beaker is used as an electrolytic cell, a titanium plate as an anode and a graphite plate as a cathode are alternately suspended in the electrolytic cell, and manganese sulfate is supplied so that the replenisher is supplied upward from the bottom of the electrolytic cell.
- An introduction tube for the electrolytic replenisher was provided. At this time, an electrode was used whose length from the bottom of the electrolytic cell to the bottom of the electrode plate was 0.2 with respect to the length 1 of the electrode plate immersed in the electrolyte.
- the electrolytic replenisher adjusted to 60 ° C was injected into the electrolytic cell through the introduction pipe, and the composition of the electrolytic solution was adjusted to 35 g / L for manganese and 60 g / L for sulfuric acid during electrolysis.
- the temperature of the upper layer of the electrolytic solution (the upper layer including the entire electrode plate immersed in the electrolytic solution) is maintained at 95-98 ° C by adjusting the disposition position and the heating temperature of the electrolytic solution.
- the electrolysis was performed at a current density of 55 A / m 2 for 10 days while maintaining the temperature of the lower layer (65 to 80 ° C).
- Table 1 shows the measured values of manganese concentration, sulfuric acid concentration, and current density.
- Example 1 In the same electrolytic cell as in Example 1, use an electrode whose length is 0.4 so that the distance from the bottom of the electrolytic cell to the bottom of the electrode plate is 0.4 with respect to the length of the electrode plate immersed in the electrolyte. , And other conditions were the same as in Example 1 for electrolytic deposition, crushing and washing (for details, see Table 1). Also in this case, the adjustment was performed so that the entire electrode plate immersed in the electrolytic solution was included in the upper layer portion (high temperature portion).
- the manganese sulfate electrolysis replenisher which is composed of a manganese raw material containing a large amount of Ca, was adjusted and supplied, and the other conditions were the same as in Example 1 for electrolytic deposition and grinding * washing (see Table 1 for details). That).
- the composition of the electrolyte is adjusted to 30 g / L manganese and 70 g / L sulfuric acid during electrolysis, and the heat exchanger by adjusting the arranged position and the heating temperature, keeping the temperature of the upper layer of the electrolytic solution to 95- 98 ° C, while maintaining the lower temperature of 65- 80 ° C, at a current density 55A / m 2 10 days Electrolyzed. Electrodeposition and pulverization and washing were performed under the same conditions as in Example 1. The Ln content in the manganese oxide was 10 ppm. (See Table 1 for details).
- a 5L beaker is used as an electrolytic cell, a titanium plate as an anode, and a graphite plate as a cathode are alternately suspended in the electrolytic cell, and manganese sulfate is supplied so that the replenisher is replenished downward at the bottom of the electrolytic cell.
- An introduction tube for the electrolytic replenisher was provided.
- an electrode was used whose length from the bottom of the electrolytic cell to the bottom of the electrode plate was 0.2 with respect to the length 1 of the electrode plate immersed in the electrolyte.
- the electrolytic replenisher adjusted to 98 ° C was injected into the electrolytic cell through the introduction tube, and the composition of the electrolytic solution was adjusted to 60 g / L for manganese and 15 g / L for sulfuric acid during electrolysis.
- the current density was set to 55 A / m 2 and the electrolysis was carried out for 10 days while adjusting the arrangement of the heat exchanger and the heating temperature so that the temperature of the electrolytic solution was maintained at 95 to 98 ° C.
- Table 1 shows the measured values of the manganese concentration, the sulfuric acid concentration, and the current density A / m 2 .
- the manganese oxide obtained by electrolytic deposition was coarsely pulverized, washed with hot water at 90 ° C for 30 minutes, decanted, further washed with stirring in the same amount of water for 24 hours, and decanted again. I did it. Then, the manganese oxide obtained here is neutralized with caustic soda so that the JIS pH of the manganese oxide becomes 3.5, and then dried by heating at 70 ° C for 0.5 hours or at 95 ° C for 0.5 hours. The resultant was dried by heating for 5 hours, and then pulverized to an average particle size of about 35 ⁇ m to obtain a manganese oxide powder.
- Manganese 15 g / L the composition of the electrolytic solution during electrolysis, with adjusted so that sulfuric acid 30 g / L, is set to the current density 30AZm 2, other conditions and electrolytic to be the same deposition as in Comparative Example 1 Grinding and washing were performed (see Table 1 for details).
- the temperature of the electrolyte is 95-96 ° C, and the composition of the electrolyte
- the manganese oxide powder as a sample was heated to 110 ° C and then to 500 ° C, and the amount of water released by holding the water until the count of water became stable was measured. From the water content, the water released when heated and dried at 110 ° C above The molar amount of the removed water content H element was calculated except for the amount.
- the amount of S element was measured by an ICP analyzer.
- the amount of each Me element was measured by an ICP analyzer.
- the XRD measurement conditions were as follows: Cu tube, scan step 0.02 °, scan speed 1. / min.
- An LR6 (AA) alkaline manganese battery was fabricated using manganese oxide as the positive electrode active material.
- the battery electrolyte a solution obtained by adding about 1.0% of carbomethoxycellulose and sodium polyacrylate as a gelling agent to a solution obtained by saturating zinc oxide in a 40% aqueous solution of potassium hydroxide.
- 3. Og of zinc powder was used as the negative electrode active material, and the negative electrode material was used by directly mixing the negative electrode active material with 1.5 g of the above-mentioned electrolytic solution to form a gel.
- FIG. 1 shows a vertical cross-sectional view of the alkaline manganese battery thus manufactured.
- the alkaline manganese battery shown in FIG. 1 includes a positive electrode active material 2 composed of manganese oxide disposed inside a positive electrode can 1 and a gel zinc powder disposed inside a positive electrode active material 2 with a separator 3 interposed therebetween. And a negative electrode material 4.
- a negative electrode current collector 5 is inserted into the negative electrode material 4, and the negative electrode current collector 5 penetrates a sealing body 6 closing the lower part of the positive electrode can 1, and a negative electrode bottom plate 7 provided below the sealing body 6. And is joined.
- a cap 8 serving as a positive electrode terminal is provided above the positive electrode can 1.
- Insulating rings 9 and 10 sandwiching the cap 8 and the negative electrode bottom plate 7 from above and below are provided.
- the cap 8 and the negative electrode bottom plate 7 are fixed via the insulating rings 9 and 10 and heat is applied so as to cover the outer periphery of the positive electrode can 1.
- a shrinkable resin tube 11 and an outer can 12 covering the same are provided.
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004115445A JP3578349B1 (ja) | 2004-04-09 | 2004-04-09 | 正極活物質用マンガン酸化物 |
JP2004-115445 | 2004-04-09 |
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WO2005100250A1 true WO2005100250A1 (ja) | 2005-10-27 |
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PCT/JP2005/000229 WO2005100250A1 (ja) | 2004-04-09 | 2005-01-12 | 正極活物質用マンガン酸化物 |
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WO (1) | WO2005100250A1 (ja) |
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JP3983779B2 (ja) * | 2004-09-09 | 2007-09-26 | 三井金属鉱業株式会社 | 正極活物質用マンガン酸化物 |
JP4993888B2 (ja) * | 2004-09-09 | 2012-08-08 | 三井金属鉱業株式会社 | 正極活物質用マンガン酸化物粉体 |
JP4993887B2 (ja) * | 2004-09-09 | 2012-08-08 | 三井金属鉱業株式会社 | 正極活物質用マンガン酸化物粉体 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003163003A (ja) * | 2001-11-26 | 2003-06-06 | Mitsui Mining & Smelting Co Ltd | 電池用正極活物質及び電解二酸化マンガンの製造方法並びに電池 |
JP2004047445A (ja) * | 2002-05-15 | 2004-02-12 | Mitsui Mining & Smelting Co Ltd | 電池用正極活物質及び電解二酸化マンガンの製造方法並びに電池 |
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- 2004-04-09 JP JP2004115445A patent/JP3578349B1/ja not_active Expired - Fee Related
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JP2003163003A (ja) * | 2001-11-26 | 2003-06-06 | Mitsui Mining & Smelting Co Ltd | 電池用正極活物質及び電解二酸化マンガンの製造方法並びに電池 |
JP2004047445A (ja) * | 2002-05-15 | 2004-02-12 | Mitsui Mining & Smelting Co Ltd | 電池用正極活物質及び電解二酸化マンガンの製造方法並びに電池 |
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JP3578349B1 (ja) | 2004-10-20 |
JP2007122877A (ja) | 2007-05-17 |
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