WO2005124900A1 - リチウム電池用正極活物質 - Google Patents
リチウム電池用正極活物質 Download PDFInfo
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- WO2005124900A1 WO2005124900A1 PCT/JP2005/011240 JP2005011240W WO2005124900A1 WO 2005124900 A1 WO2005124900 A1 WO 2005124900A1 JP 2005011240 W JP2005011240 W JP 2005011240W WO 2005124900 A1 WO2005124900 A1 WO 2005124900A1
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- peak
- manganese
- positive electrode
- electrode active
- lithium
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- H01M4/48—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
- H01M4/502—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese for non-aqueous cells
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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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 relates to a positive electrode active material for a lithium battery, which also has a manganese dioxide power.
- manganese dioxide, manganese fluoride and the like are known as typical ones, and these have already been put to practical use.
- manganese diacid manganese is particularly advantageous in that it has excellent preservability and is inexpensive, and thus its use as a positive electrode active material has been studied in many cases (see Patent Documents 1 and 2 and the like).
- an orthorhombic lithium manganese composite oxide obtained by baking at a low temperature of 350 to 450 ° C. is subjected to an acid treatment (Patent Document 3), and a spinel type LiMn O is subjected to an acid treatment.
- Patent Document 4 Manganese oxide (Patent Document 4) and manganese dioxide (LiMnO acid-treated and calcined)
- Non-patent document 1 is known.
- Patent Document 5 discloses manganese dioxide obtained by firing ⁇ -type diacid manganese at a temperature of 250 to 400 ° C
- Patent Document 6 discloses ⁇ -type diacid manganese.
- Disodium manganese dioxide obtained by baking manganese manganese at a temperature of 150 to 450 ° C. is disclosed.
- Patent Document 7 discloses that after spinel-type composite oxide is acid-treated, the temperature is 200 to 400 ° C.
- Patent Document 1 Japanese Patent Laid-Open No. 3-80120 (Claims, etc.)
- Patent Document 2 JP-A-3-254065 (Claims, etc.)
- Patent Document 3 JP-A-3-122968 (Claims, pages 2, 3 etc.)
- Patent Document 4 Japanese Patent Publication No. 58-34414 (pages 1 and 2)
- Patent Document 5 JP-A-61-17424 (page 3 etc.)
- Patent Document 6 Japanese Patent Application Laid-Open No. 1 231270 (Claims, etc.)
- Patent Document 7 Japanese Patent Application Laid-Open No. 2001-273900 (Claims, etc.)
- Non-patent Document 1 Thackeray, "understanding Mn ⁇ 2 for lithium batteries", (Lecture at IBA Inuyama Meeting, October 28-29, 1991), P. 33, 35, 36 Disclosure of the invention
- the present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a positive electrode active material for a lithium battery having excellent high-temperature resistance.
- the peak intensity is not less than 0.05.
- the present invention proposes a positive electrode active material for a lithium battery having a crystal structure in which a peak exists (based on the larger peak).
- the peak intensity means the height of the peak
- the peak intensity ratio means the ratio of the height of the peak.
- the present invention proposes a positive electrode active material for a lithium battery having a crystal structure in which a peak having a peak intensity ratio of 0.05 or more with respect to the above peak is present.
- the manganese diacid manganese having a crystal structure in which a peak having a predetermined peak intensity exists at the position as described above has only the above-mentioned six or seven peaks. If there are at least the 6 or 7 peaks that do not mean that This means that other peaks may exist at positions other than! /.
- the positive electrode active material when a lithium battery is constituted by using diacid manganese oxide as the positive electrode active material, the positive electrode active material is stable with respect to the electrolytic solution and gas generation is difficult. It has properties that combine properties with properties that are electrochemically active when discharged. That is, the positive electrode active material for a lithium battery of the present invention is a battery excellent in high temperature resistance, particularly
- a battery having excellent storage characteristics even in a high-temperature use environment of 80 ° C or higher and excellent battery characteristics such as continuous characteristics can be obtained. Therefore, it is particularly suitable for use in a lithium battery used in an environment reaching 80 ° C or higher.
- lithium battery includes all batteries containing lithium or lithium ion in a battery, such as a lithium primary battery, a lithium secondary battery, a lithium ion secondary battery, and a lithium polymer battery. I mean to.
- the peak intensity means a peak height (cps).
- the meaning of “consisting of” the positive electrode active material for a lithium battery composed of a predetermined manganese dioxide means not only the positive electrode active material composed of only the predetermined manganese dioxide but also the superiority of the predetermined manganese dioxide. If the above effect can be enjoyed, the positive electrode active material containing other manganese dioxide is also intended to be included, and the content of the predetermined manganese dioxide is not strictly specified. A content of at least 50%, preferably at least 70%, particularly preferably at least 80%, more preferably at least 90%, of the manganese content is acceptable.
- FIG. 1 shows an X-ray diffraction pattern (chart) obtained in Example 2.
- FIG. 2 shows an X-ray diffraction pattern (chart) obtained in Example 4.
- FIG. 3 shows an X-ray diffraction pattern (chart) obtained in Example 5.
- FIG. 4 is a cross-sectional view of a test cell manufactured for battery evaluation.
- FIG. 5 is an X-ray diffraction pattern (chart) of the fired dioxygen manganese dioxide obtained in Example 2 after discharging using the test cell produced.
- FIG. 6 is an X-ray diffraction pattern (chart) of dioxin manganese dioxide after discharging using the test cell produced in Comparative Example 1 and produced.
- a positive electrode active material for a lithium battery which also has a crystal structure having a peak having a peak intensity ratio of 0.05 or more with respect to the peak (reference peak).
- the first embodiment does not mean that only the above-mentioned six peaks appear in the X-ray diffraction pattern.
- the second embodiment does not mean that the X-ray diffraction pattern This does not mean that only the seven peaks shown above appear. If the above six or seven peaks appear in the X-ray diffraction pattern, peaks appearing in other positions are allowed.
- the peak with the larger peak intensity is used as the reference peak.
- the peak at 19.5 ° ⁇ 0.5 ° is characteristic of ⁇ - ⁇ .
- Peaks located at 28.6 ° ⁇ 0.5 °, 56.6 ° ⁇ 0.5 °, 59.1 ° ⁇ 0.5 ° and 65.1 ° ⁇ 0.5 ° are characteristic peaks of jS-MnO.
- the manganese dioxides of the first and second embodiments are not manganese dioxides having any one of the crystal structures of the ⁇ phase, the j8 phase, and the gamma phase. Also, it is not a dimanganese manganese dioxide having a two-phase coexisting crystal structure, which is a combination of these two types of power. At least spinel-type lithium manganate, ⁇ -MnO and jS-MnO, or even MnO
- this is a manganese dioxide having a crystal structure that exists.
- these manganese diacids are referred to as “spinel- ⁇ - ⁇ (- ⁇ ) phase coexisting manganese diacids”.
- ⁇ 0.5 ° does not indicate a measurement error but means a peak that appears at a position within ⁇ 0.5 °. If the lithium content, acid treatment conditions, firing conditions, etc., described later, are different, the peak position will fluctuate due to changes in the axial length, etc., even if the crystal structure has the same morphology, but within the range of ⁇ 0.5 °. A similar effect can be expected as long as these are included, and the purpose is to include these. However, from the viewpoint of being more certain, ⁇ 0.2 ° is more preferable than ⁇ 0.5 °, and ⁇ 0.2 ° is more preferable. The same applies to other peaks.
- the present invention also includes a positive electrode active material containing manganese dioxide with another crystal structure within a range where the manganese dioxide can be enjoyed, and contains spinel- ⁇ - ⁇ (_ ⁇ ) phase coexisting with manganese dioxide.
- a ratio of at least 50% or more, preferably 70% or more, particularly preferably 80% or more, and more preferably 90% or more can be considered to be acceptable.
- the positive electrode active materials of the first and second embodiments are more preferable. The following can be said.
- Those comprising manganese acid are even more preferred.
- the peak existing at the position of 20 37.3. ⁇ 0.5.
- the peak intensity ratio is 0.3 or more with respect to the peak, and the full width at half maximum of the peak is 1.0 ° or less, particularly 0.2 to 1.0 °. Is even more preferred.
- An manganese oxide is more preferable.
- the “full width at half maximum of the peak” means the peak width (angle) at 1Z2 of the peak height.
- the amount of lithium element in manganese dioxide is 1.0% or less, particularly 0.3 to 1.0%, especially 0.3 to 1.0%. 0.8%, especially It is preferably from 0.3 to 0.6%.
- the amount of lithium element is a value obtained by an ICP analyzer.
- the method for producing a positive electrode active material of the present invention is not particularly limited as long as spinel- ⁇ - ⁇ (- ⁇ ) phase coexisting manganese diacid can be produced.
- the following is an explanation of an example of a preferred manufacturing method.
- the present invention is not limited to this method.
- a raw material manganese dioxide, a lithium salt compound, a boron compound, and a magnesium compound are mixed and fired at 700 to 950 ° C (first firing).
- a boron-containing lithium-manganese composite oxide (hereinafter referred to as “boron-containing LMO”) is obtained, and the boron-containing LMO is washed with an acid, and if necessary, the particle size is adjusted to a predetermined value.
- second baking with C, it can be manufactured by a manufacturing method characterized by obtaining manganese dioxide having spinel-18- ⁇ (-7) phase.
- Manganese diacid having a structure can be manufactured, and by firing at a high temperature side within the range of 200 to 330 ° C., the spinel-type lithium manganate, ⁇ - ⁇ and
- the second firing temperature is not the only factor that distinguishes the two.
- Manganese diacid manganese as a raw material may be any of those obtained by an electrolytic method, those obtained by a chemical synthesis, and those obtained by a natural method. However, among them, electrolytic diacid manganese is particularly preferred.
- the ore diacid manganese is ⁇ -type manganese dioxide consisting mainly of ⁇ -phase.
- Manganese dioxide is mainly ⁇ -type manganese dioxide with ⁇ -phase power
- hollandite manganese dioxide is ⁇ -type manganese dioxide mainly with ⁇ -phase.
- Manganese dioxide obtained by acid treatment as described in 4,246,253 is a fly-shaped manganese dioxide that is also compatible with manganese dioxide produced by chemical reduction of potassium permanganate. It is ⁇ -type manganese dioxide composed of a phase and electrolytic manganese dioxide is ⁇ -type manganese dioxide composed mainly of a ⁇ -phase.
- the electrolytic manganese diacid manganese may be, for example, any one obtained by electrolyzing an electrolytic solution consisting of a conventionally known manganese sulfate and sulfuric acid solution.
- the manganese concentration in the electrolyte is generally 20 gZL to 50 gZL
- the sulfuric acid concentration is generally 30 g / L to 80 g / L.
- titanium or the like can be used for the anode and carbon or the like can be used for the cathode.
- the electrolysis conditions may be the same as those known in the art.
- the electrolysis may be performed at a bath temperature of 90 to 100 ° C. and a current density of 50 AZm 2 to 100 AZm 2 .
- lithium salt conjugate examples include, but are not particularly limited to, lithium carbonate, lithium hydroxide, and lithium nitrate.
- Examples of the boron compound include, but are not particularly limited to, boric acid, lithium borate, sodium tetraborate, and the like.
- the boron compound is preferably used in such an amount as to contain 0.001 to 2.0% by mass, particularly 0.05 to 0.3% by mass of boron when synthesizing the lithium manganese composite oxide.
- the magnesium compound is not particularly limited, and examples thereof include magnesium oxide, magnesium oxide, and carbonate.
- ⁇ Ka ⁇ of the magnesium compound is preferably the substitution amount of Mg element is added to a 0.05 mol% to 0.5 mol 0/0 for Mn! /.
- the mixture is fired at 700 to 900 ° C for 5 to 20 hours to produce boron-containing LMO.
- the firing temperature is not necessarily limited to 700 to 900 ° C. Even if firing is performed at 550 to 950 ° C, the same amount of boron as the boron-containing LMO obtained by firing at 700 to 900 ° C is obtained. Element-containing LMO may be obtained.
- the lithium manganese composite oxide has a structure mainly composed of spinel, and it is easy to remove lithium by acid washing in a later step.
- the lithium manganese composite oxide having a boron content of 0.001 to 2.0 mass% at a firing temperature of 550 to 900 ° C which is also influenced by the particle size of the raw material, Can obtain manganese dioxide of lm 2 / g to 8 m 2 / g.
- it is fired at a temperature higher than 900 ° C, it decomposes and impurities such as MnO
- impurities such as LiMn Oz (where Z is Z> 4)
- the boron-containing LMO obtained by the above calcination preferably has a structure mainly composed of spinel.
- the lithium manganese composite oxide there are other forms such as a layered structure in addition to the spinel structure.
- the structure is mainly composed of spinel, the lithium manganese composite oxide is formed by pickling in a later step. There is an advantage that lithium can be easily removed from the dashi.
- the boron-containing LMO has a boron compound of water like the chemical formula LiMn O -Li B O.
- the salt is in a state of being soluble together with the lithium manganese composite oxide.
- Examples 1 to L0 can be referred to as a production method therefor.
- “ ⁇ ” in the chemical formula means that the compound is an addition compound, and LiMn O and Li B
- element B is not a spinel constituent element, and the force is mixed.
- the specific surface areas of the lithium manganese composite oxide and the manganese dioxide can be reduced.
- the role of boron is not only to reduce the specific surface area.
- it can be considered as one of the causative substances that can finally produce spinel-j8- ⁇ (- ⁇ ) phase coexisting diacid manganese.
- boron content of boron in containing LMO is 0.001 to 2.0 mass 0/0, especially 0.01 to 0.5 wt%, preferably from among them from 0.05 to 0.3 wt% .
- the boron content is 0.001% by mass or more, the effect of effectively reducing the specific surface area of manganese dioxide can be obtained, and the water content does not increase.
- the content when stored at high temperatures in batteries can sufficiently obtain the effect of suppressing the elution amount of Mn. Further, when the content is 2.0% by mass or less, the battery characteristics can be suitably maintained.
- Lithium and boron can be removed by this acid washing.
- the acid washing is preferably carried out using an inorganic acid (mineral acid) such as hydrochloric acid, sulfuric acid or nitric acid.
- an inorganic acid such as hydrochloric acid, sulfuric acid or nitric acid.
- the treatment conditions of the acid washing are not particularly limited as long as lithium in the boron-containing LMO can be removed, and for example, the pH may be reduced using an acidic solution having a pH of 8 to 2.5, particularly 2.2 to 2.3. It is preferable to wash the contained LMO and treat it so that the lithium content is 1% by mass or less, particularly 0.6% by mass or less.
- the boron-containing LMO is immersed in 10 gZL to 100 gZL of a mineral acid, for example, sulfuric acid with stirring for about 1 hour (pH 2.2 to 2.3), and then washed twice or three times. do it.
- filtration may be performed without washing with water.
- the manganese dioxide after the acid washing is recovered by filtration, dried, and then, if necessary, crushed to obtain a particle having a predetermined particle size (for example, 1 ⁇ m to 100 ⁇ m, preferably 5 ⁇ m to 50 ⁇ m). After adjusting to m), it is preferable to be subjected to firing.
- a predetermined particle size for example, 1 ⁇ m to 100 ⁇ m, preferably 5 ⁇ m to 50 ⁇ m. After adjusting to m), it is preferable to be subjected to firing.
- the drying at this time is preferably performed at about 100 ° C, and the crushing may be performed in such a manner that the crushing is performed lightly in a mortar or the like.
- LiMnO can be treated with an acid.
- the force which is known to become a dimanganese diacid manganese by firing is obtained by baking at 200 to 330 ° C. by the above-mentioned pickling, for example, JP-A-61-17424, JP-A-1- As disclosed in Japanese Patent No. 231270 and Japanese Patent Application Laid-Open No. 2001-273900, manganese dioxide which is different from manganese dioxide can be obtained. It is considered that it is not a ⁇ -type diacid manganese.
- the mixture is calcined at 200 to 330 ° C. for 2 to 10 hours to obtain spinel- ⁇ - ⁇ (- ⁇ ) phase coexisting manganese diacid.
- the firing conditions for obtaining the spinel- ⁇ - ⁇ (- ⁇ ) phase coexisting manganese diacid are not limited to the above conditions.
- firing may be performed under other firing conditions.
- the spinel- ⁇ - ⁇ (- ⁇ ) phase coexistence is almost the same as that of firing at 200 to 330 ° C for 2 to 10 hours.
- manganese acid There is a possibility of obtaining manganese acid.
- Japanese Patent Application Laid-Open No. 231270/1990 discloses a diacid manganese dioxide obtained by firing ⁇ -type manganese dioxide at a temperature of 150 to 450 ° C.
- the power pickling conditions are different, and spinel- ⁇ - ⁇
- the crystal structure is different from that of the ( ⁇ ⁇ ) phase coexisting manganese diacid.
- JP-A-1111516 and JP-A-2001-273900 disclose a composite oxide obtained by subjecting a spinel-type composite oxide to an acid treatment and then heat-treating it at a temperature of 200 to 400 ° C. Since the purpose of the pickling conditions is different and the amount of residual lithium is different, it is not sufficient when used in primary batteries such as spinel- ⁇ - ⁇ (- ⁇ ) phase coexisting diacid manganese. There is a difference such as the characteristic cannot be obtained.
- the spinel-io8- ⁇ (- ⁇ ) phase coexisting manganese oxide obtained by the above-mentioned production method has not only the above-mentioned features but also 0.1% by mass or less of boron, preferably 0.01% by mass. Below, especially 0.001 to 0.01 mass% is preferable.
- the raw material manganese dioxide, the lithium salt compound, the boron compound, and the magnesium compound are mixed, and calcined at 700 to 950 ° C. (first calcining) to perform boron-containing lithium manganese composite oxidation.
- boron-containing LMO (Hereinafter referred to as “boron-containing LMO”), and the boron-containing LMO is washed with an acid, and if necessary, the particle size is adjusted to a predetermined particle size, and then calcined at 200 to 330 ° C. (second calcining). )
- the melting point is 1000 ° C or less, preferably 900 ° C. C or less, particularly preferably 750 ° C. or less even when using an oxidizing substance having a flux effect, similarly to boron, it is possible to obtain a spinel-j8- ⁇ (- ⁇ ) phase coexisting manganese diacid. It is considered possible.
- the negative electrode active material is not particularly limited, but for example, a material whose power is conventionally known can be used, and for example, lithium or the like can be used.
- the electrolyte is not particularly limited. For example, a conventionally known force can be used. For example, an organic solvent solution of a lithium salt can be used.
- a lithium primary battery using spinel- ⁇ - ⁇ (- ⁇ ) phase coexisting dimanganese dimanganese is excellent in high-temperature resistance, and therefore, has a spinel-j8- ⁇ (_ ⁇ ) phase coexisting diacid.
- Manganese manganese is particularly suitable as a positive electrode active material for a lithium battery used in an environment at a high temperature, for example, 80 ° C. or higher.
- the lithium-manganese composite oxide containing boron is subjected to a mineral acid treatment and then calcined, it will be a diacid battery that will be more excellent due to high temperature resistance when used as a positive electrode active material of a lithium primary battery.
- Mandarin manganese can be manufactured.
- the manganese dioxide of the present invention is particularly suitable as a positive electrode active material of a lithium primary battery at this stage, but as the development of a negative electrode material progresses in the future, the positive electrode active material of a secondary battery, that is, It is also particularly suitable as a positive electrode active material for various lithium batteries. You can think.
- Li B O is added to the mixture so that the B content becomes 0.01% by mass.
- lithium manganese (Chemical formula LiMn O) was obtained. 100 g / L HSO
- Examples 1 to: X-ray diffraction measurements were performed on the L0 and manganese diacid manganese obtained in Comparative Examples 1 to 3, and the obtained X-ray diffraction patterns showed peak intensities of characteristic peaks ( The peak height) is shown in Table 2 as a ratio when the peak intensity at 20 37.3 ° ⁇ 0.5 ° is 100.
- FIGS. 1, 2, and 3 As typical X-ray diffraction patterns (charts), the X-ray diffraction patterns (charts) of Examples 2, 4, and 5 are shown in FIGS. 1, 2, and 3.
- the sample was placed on an X-ray diffraction analyzer (RINT2200V, manufactured by Rigaku Denki Co., Ltd.) using a tube and a monochromator made of Graphite, a tube voltage of 40 kV, a tube current of 4 OmA and a divergence slit of 0. .5deg, scattering slit 0.5deg, light receiving slit 0.15mm, scanning speed 1.OOdeg / min, sampling pitch 0.002deg, scanning range 10.000-80.000 °
- RINT2200V X-ray diffraction analyzer
- a test cell as shown in Fig. 4 was prepared, and a continuous discharge of ImAZcm 2 was performed at room temperature of 20 ° C based on the area of the mixture, and the discharge end voltage was 2.5 V ⁇ . The discharge duration until this was reached was measured. The measurement results are shown in Table 3 as relative values when the discharge duration of Comparative Example 1 was 100.
- the electrolyte used was a solution of 1 mol ZL of lithium perchlorate in a 1: 1 mixed solvent of propylene carbonate and 1,2-dimethoxyethane.
- the reagent used in this case was dried and treated in a conventional manner.
- sheet metal lithium was punched out so as to have the same diameter as the anode mixture.
- 1 is a negative electrode terminal for extracting a current to the outside
- 2 is an insulator made of Teflon resin, each of which is screwed so that the cell can be sealed.
- Reference numeral 3 denotes a negative electrode plate
- 4 denotes a pressed sheet-shaped metallic lithium (negative electrode)
- 5 denotes a nonwoven fabric separator
- 6 denotes an anode mixture prepared by the above method
- 7 denotes a stainless steel anode. .
- the manganese diacids obtained in Examples 1 to 10 and Comparative Examples 1 to 3 were immersed in an electrolyte for a model battery, and the amount of manganese in the electrolyte after holding at 80 ° C for 10 days was determined by ICP emission.
- the amount of manganese eluted was measured by spectroscopic analysis, and the measurement results are shown in Table 3 as relative values when the amount of manganese eluted in Comparative Example 1 was set to 100.
- a solution prepared by dissolving 1 mol ZL of lithium perchlorate in a 1: 1 mixed solvent of tan was used. If manganese in manganese dioxide elutes into the electrolytic solution during storage, the eluted manganese deposits on the separator and clogs the separator. As a result, the internal resistance of the battery increases, and Performance will be degraded. Therefore, the manganese elution amount is an index for evaluating the storage characteristics.
- Example 2 0.135 g of the manganese dioxide obtained in Example 2 and Comparative Example 1 was weighed, 0.09 g of graphite and 0.06 g of tetrafluoroethylene resin were mixed, and the mixture was pressurized at 3 tZcm 2. It was molded to prepare an anode mixture. In addition, these pre-dried dimanganese disulfide, graphite and tetrafluoroethylene resin were used.
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Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/630,259 US8029929B2 (en) | 2004-06-22 | 2005-06-20 | Positive electrode active substance for lithium cell |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-184186 | 2004-06-22 | ||
| JP2004184186 | 2004-06-22 | ||
| JP2004-293382 | 2004-10-06 | ||
| JP2004293382 | 2004-10-06 | ||
| JP2004358887A JP3742646B1 (ja) | 2004-06-22 | 2004-12-10 | リチウム電池用正極活物質 |
| JP2004-358887 | 2004-12-10 |
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| WO2005124900A1 true WO2005124900A1 (ja) | 2005-12-29 |
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| US (1) | US8029929B2 (ja) |
| JP (1) | JP3742646B1 (ja) |
| WO (1) | WO2005124900A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009110210A1 (ja) * | 2008-03-03 | 2009-09-11 | パナソニック株式会社 | リチウム電池 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4748760B2 (ja) * | 2003-06-24 | 2011-08-17 | 三井金属鉱業株式会社 | リチウム一次電池用正極活物質およびその製造方法 |
| WO2007004170A2 (en) * | 2005-06-30 | 2007-01-11 | Synexa Life Sciences (Proprietary) Limited | Production of secondary metabolites using capillary membranes |
| JP5313543B2 (ja) | 2008-04-28 | 2013-10-09 | パナソニック株式会社 | リチウム電池 |
| DE102008029804A1 (de) | 2008-06-24 | 2010-07-08 | Süd-Chemie AG | Mischoxid enthaltend einen Lithium-Mangan-Spinell und Verfahren zu dessen Herstellung |
| JP2011060655A (ja) * | 2009-09-11 | 2011-03-24 | Panasonic Corp | リチウム電池 |
| US8303840B2 (en) * | 2010-03-12 | 2012-11-06 | The Gillette Company | Acid-treated manganese dioxide and methods of making thereof |
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| JPH11329424A (ja) * | 1999-04-26 | 1999-11-30 | Sanyo Electric Co Ltd | 非水系二次電池 |
| JP2005038839A (ja) * | 2003-06-24 | 2005-02-10 | Mitsui Mining & Smelting Co Ltd | リチウム一次電池用正極活物質および二酸化マンガンの製造方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246253A (en) | 1978-09-29 | 1981-01-20 | Union Carbide Corporation | MnO2 derived from LiMn2 O4 |
| JPS5834414A (ja) | 1981-08-26 | 1983-02-28 | Canon Inc | 焦点検出装置 |
| US4604336A (en) | 1984-06-29 | 1986-08-05 | Union Carbide Corporation | Manganese dioxide and process for the production thereof |
| JPH01231270A (ja) | 1988-03-09 | 1989-09-14 | Sanyo Electric Co Ltd | 非水系二次電池 |
| JPH0380120A (ja) | 1989-08-22 | 1991-04-04 | Mitsui Mining & Smelting Co Ltd | リチウム一次電池用二酸化マンガンの製造方法 |
| JPH03122968A (ja) | 1989-10-05 | 1991-05-24 | Mitsui Mining & Smelting Co Ltd | リチウム一次電池用二酸化マンガンの製造方法 |
| JPH03254065A (ja) | 1990-03-02 | 1991-11-13 | Mitsui Mining & Smelting Co Ltd | リチウム一次電池用陽極活物質及びその製造方法並びにリチウム一次電池 |
| CA2068015A1 (en) * | 1991-06-17 | 1992-12-18 | Michael M. Thackeray | Electrode material |
| JP5226917B2 (ja) | 2000-01-21 | 2013-07-03 | 昭和電工株式会社 | 正極活物質、その製造法及びそれを用いた非水二次電池 |
-
2004
- 2004-12-10 JP JP2004358887A patent/JP3742646B1/ja not_active Expired - Fee Related
-
2005
- 2005-06-20 US US11/630,259 patent/US8029929B2/en not_active Expired - Fee Related
- 2005-06-20 WO PCT/JP2005/011240 patent/WO2005124900A1/ja not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11329424A (ja) * | 1999-04-26 | 1999-11-30 | Sanyo Electric Co Ltd | 非水系二次電池 |
| JP2005038839A (ja) * | 2003-06-24 | 2005-02-10 | Mitsui Mining & Smelting Co Ltd | リチウム一次電池用正極活物質および二酸化マンガンの製造方法 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009110210A1 (ja) * | 2008-03-03 | 2009-09-11 | パナソニック株式会社 | リチウム電池 |
| JP2009238743A (ja) * | 2008-03-03 | 2009-10-15 | Panasonic Corp | リチウム電池 |
| US8557439B2 (en) | 2008-03-03 | 2013-10-15 | Panasonic Corporation | Lithium battery including positive electrode comprising manganese oxide in a mixed crystal state |
Also Published As
| Publication number | Publication date |
|---|---|
| US8029929B2 (en) | 2011-10-04 |
| JP3742646B1 (ja) | 2006-02-08 |
| US20080032198A1 (en) | 2008-02-07 |
| JP2006134851A (ja) | 2006-05-25 |
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