WO2002019449A1 - Materiau actif positif pour cellule secondaire a electrolyte non aqueux, procede d'elaboration, et cellule secondaire a electrolyte non aqueux - Google Patents

Materiau actif positif pour cellule secondaire a electrolyte non aqueux, procede d'elaboration, et cellule secondaire a electrolyte non aqueux Download PDF

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Publication number
WO2002019449A1
WO2002019449A1 PCT/JP2001/007406 JP0107406W WO0219449A1 WO 2002019449 A1 WO2002019449 A1 WO 2002019449A1 JP 0107406 W JP0107406 W JP 0107406W WO 0219449 A1 WO0219449 A1 WO 0219449A1
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Prior art keywords
active material
oxide
positive electrode
electrode active
aqueous electrolyte
Prior art date
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PCT/JP2001/007406
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English (en)
Japanese (ja)
Inventor
Kenji Yoshikawa
Tetsu Fujiwara
Tadatoshi Murota
Shigeru Ono
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Santoku Corporation
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Publication of WO2002019449A1 publication Critical patent/WO2002019449A1/fr

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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
    • H01M4/485—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
    • 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
    • H01M4/13—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
    • 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
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • 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
    • 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
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • 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
    • 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

  • Non-aqueous electrolyte secondary battery positive electrode active material method for producing the same, and non-aqueous electrolyte secondary battery
  • the present invention relates to a non-aqueous electrolyte active material for a secondary battery, which can effectively improve load characteristics and increase capacity in a secondary battery using a non-aqueous solution as an electrolyte, a method for producing the same, and a non-aqueous solution using the same.
  • Water electrolyte related to secondary batteries is a non-aqueous electrolyte active material for a secondary battery, which can effectively improve load characteristics and increase capacity in a secondary battery using a non-aqueous solution as an electrolyte, a method for producing the same, and a non-aqueous solution using the same.
  • Lithium ion secondary batteries use a composite oxide of lithium and a transition metal such as konoleto, nickel, or manganese as the positive electrode active material, and a carbonaceous material such as carbon capable of inserting and removing lithium ions from the negative electrode active material. It is a secondary battery using materials.
  • the lithium ion secondary battery has a feature that it has a larger capacity and a higher voltage than a nickel-metal hydride storage battery or the like, but has a disadvantage that it has inferior high load characteristics as compared with a NiZMH battery and a NiZCd battery.
  • a method of increasing the conductive agent in the positive electrode active material a method of adding another element such as A1 as an element constituting the positive electrode active material, or a method of adding fine particles to the positive electrode active material are used. Methods have been studied, but all of these methods lead to a decrease in battery capacity.
  • containing lithium, and Co, Ni, oxides containing at least one transition element is selected from the group consisting of Mn ⁇ Pi Fe and (X), LiLn0 2 (wherein, L n is a small number selected from the group consisting of Y (yttrium), Sc (scandium) and trivalent rare earth metals. Show at least one species.
  • the present invention provides a positive electrode active material for a non-aqueous electrolyte secondary battery containing the oxide (Y) represented by the formula (1).
  • a positive electrode having a positive electrode active material powder, a negative electrode, and an electrolytic solution, wherein the positive electrode active material powder contains the nonaqueous electrolytic solution and the positive electrode active material for a secondary battery.
  • a secondary battery will be provided.
  • FIG. 1 is a graph showing the results of the measurement of the effect of the discharge capacity on the content of LiYbO 2 , which is an oxidized product (Y), performed in Example 3.
  • FIG. 2 is a graph showing the results of the measurement of the effect of the discharge capacity on the particle size of LiYbO 2 , which is the oxidized product (Y), performed in Example 3.
  • FIG. 3 is a graph showing the change in the initial discharge capacity when the main firing temperature was changed in Example '8.
  • FIG. 4 is a graph showing the change in the initial discharge capacity when the calcination temperature was changed in Example 8.
  • the positive electrode active material for a nonaqueous electrolyte secondary battery of the present invention is an acid containing lithium and containing at least one transition element of Co, Ni, Mn, and Fe. (X) and LiLnO 2 (wherein Ln represents at least one selected from the group consisting of Y, Sc and trivalent rare earth metals). ).
  • the trivalent rare earth metal in Ln in the LiLnO 2 is not particularly limited, but in order to further improve the desired effect of the present invention, the Sm, Yb, Gd, Er, etc. It is preferable to include a trivalent rare earth metal having an ionic radius of
  • the oxide (Y) has a function of smoothly carrying lithium (Li) in and out of the oxide (X), and contributes to improvement in load characteristics and discharge capacity. Conceivable. That is, during the charging reaction, Li in the oxide (X) is reduced to Li + via the oxide (Y), and during the discharging reaction, Li + in the electrolytic solution is reduced on the oxide (Y). However, the diffusion into the oxide (X) is expected to improve the load characteristics and achieve a high discharge capacity. Further, particles having a form in which the oxidized product (Y) is dispersed on the particle surface of the oxidized product (X), or composite particles of the oxide (X) and the oxidized product (Y) are used.
  • the oxide (X) and the acid oxide (Y) include a form of a mixture of each particle, a form in which each primary particle becomes a secondary particle, and the like. Further, in addition to the particles of these forms, composite particles of an oxide (X) and an oxide (Y) may be contained.
  • the form of the mixture of the particles is preferably such that the oxide (Y) is dispersed and present on the particle surface of the oxide (X) in order to further improve the desired effect.
  • the composite particles are preferably a surface compound of an oxide (X) and an oxidant (Y), and particularly, the oxide (Y) is chemically bonded to the surface of the oxidant (X). The bonded form is preferred.
  • the oxide (X) comprises a composite oxide, for example, LiCo0 2, LiNiO 2, LMn 2 O 4, LiFe0 2, LiCo 0. 8 Ni. . 2 O 2, LiNi 0. 5 Co 0. 5 0 2, LdNi 0. 9 Co 0. I O 2 LiCo x Ni (1 _ x) such as o 2 acid represented by (o ⁇ x ⁇ i) And the like.
  • the content of the oxide (X) in the total amount of the oxide (X) and the oxide (Y) is determined so as to secure a discharge capacity when a nonaqueous electrolyte secondary battery is obtained. 60% by weight or more, preferably 80 to 99.99% by weight, particularly preferably 90 to 99% by weight.
  • the positive electrode active material of the present invention contains a composite oxide of the oxide (X) and the oxide (Y)
  • the ratio corresponding to the oxide (X) in the composite oxide is determined. It is to be included in the content ratio of the oxide (X).
  • Ln of LiLnO 2 as the acid ridden product (Y) may be used as long as the composition includes at least one selected from the group consisting of Y, Sc, and a trivalent rare earth metal.
  • Y acid ridden product
  • the ⁇ (Y) for example, LiY0 2, LiSc0 2, LiYb0 2, LiSm0 2, LiGdO 2, LiCeO 2, LiDyO 2, LiLu0 2 include, but are not limited thereto.
  • the content ratio of the oxidized product (Y) to the total amount of the oxidized product (X) and the oxide (Y) can improve the discharge capacity of a non-aqueous electrolyte secondary battery.
  • the content is preferably 0.01 to 40% by weight, particularly 0.01 to 20% by weight, more preferably 0.1 to 10% by weight, and further preferably 0.5 to 3% by weight. If the content is less than 0.01% by weight, the desired effect cannot be obtained, which is not preferable. If the content exceeds 20% by weight, the capacity may decrease due to the reduction of the active material rather than the improvement of the utilization rate of the active material. Therefore, the upper limit is preferably set to 20% by weight.
  • the positive electrode active material of the present invention contains a composite acid product of the acid oxidant (X) and the acid oxidant (Y), the oxide (Y ) Is included in the content ratio of the acid dandelion (Y).
  • the particle size of the oxide particles (X), the oxide (Y), and the composite particles is such that 90% or more of the primary particles have a particle size of 1 m or less, particularly 0.1 to 0.1%. It is preferable that the average particle diameter of the secondary particles, which is an aggregate of the primary particles, is 5 to 15 ⁇ m. In particular, it is preferable that the average particle diameter of the oxidized product (Y) is not more than rn in order to increase the discharge capacity. The effect of the addition decreases as the particle size of the oxide (Y) increases. That is, it is considered that diffusion of Li in the oxidized product (Y) becomes a problem, and the effect of addition is reduced.
  • the particle diameter of the primary particles is less than ⁇ . ⁇ ⁇ m, the surface activity of the particles is too strong, and the effect of suppressing the decomposition of the electrolytic solution may not be obtained.
  • the average particle size of the secondary particles is less than 5 ⁇ m, handling during electrode preparation is poor. If the average particle size exceeds 15 m, it is difficult to uniformly form the electrodes, which is not preferable.
  • the content ratio of such primary particles and secondary particles is not particularly limited as long as the particle size is within the above range.
  • the positive electrode active material of the present invention may contain, in addition to the oxide (X), the oxide (Y) and the composite particles, other components as long as the desired object of the present invention is not impaired.
  • each component may contain an unavoidable component accompanying production.
  • the method for producing the positive electrode active material of the present invention is not particularly limited as long as the above-mentioned positive electrode active material of the present invention is obtained.
  • A) a step of holding the molded article obtained in the step (A) at a specific temperature, and a step (C) of holding the molded body at a specific temperature after the step (B)
  • Examples include the production method of the present invention.
  • the oxide (X) used in the step (A) the above-mentioned examples are preferably exemplified.
  • the raw material component may be a raw material component of the acid product (X).
  • X a raw material component of the acid product (X).
  • at least one transition metal selected from the group consisting of Co, Ni, Mn and Fe; Inorganic compounds such as oxides, 7 oxides, chlorides, nitrates and sulfates; organic compounds such as carbonates, oxalates and acetates; oxides, hydroxides, chlorides and nitrates of Li And organic compounds such as carbonates, oxalates, and acetates thereof.
  • the above-mentioned examples are preferably exemplified as the oxidized product (Y) used in the step (A).
  • the raw material component may be a raw material component of the oxidized product (Y).
  • Y a raw material component of the oxidized product
  • the mixing ratios of the raw material components of the above-mentioned oxide (X) and Z or the oxide (X) and the raw material components of the oxide (Y) and Z or the oxide (Y) are as described above. It can be appropriately selected and determined so as to have a preferable content ratio of the oxide (X) and the oxide (Y) in the positive electrode active material of the present invention.
  • the raw material components of the oxide (X) and the sulfide or acid product (X) and the raw material components of the oxide (Y) and / or the acid product (Y) are formed.
  • a known binder generally used in molding a powder can be used as the binder for the formation.
  • an organic compound such as polyvinyl alcohol (PVA) containing no metal element is preferable.
  • the shaping can be performed by a known method or the like.
  • granulation is preferably performed so that the average particle diameter is 3 to 20 mm, particularly 5 to: LOmm.
  • the average thickness is 3 to 20 mm, particularly 5 to: LOmm. If the average particle size in the case of granulation or the thickness in the case of forming into a plate shape is less than 3 mm, sintering proceeds during sintering described below, primary particles become too large, It is not preferable because it becomes a single phase and a desired effect may not be obtained.
  • the specific temperature in the step (B) is a temperature at which at least a part of the Li compound contained in the molded product obtained in the step (A) is melted, and is a temperature of 600 to 800 ° C. This temperature is such that at least a part of the Li-dye compound in the molded product is melted, the Li compound is spread over the obtained fired product, and the reaction proceeds smoothly.
  • the oxide (Y) are preferably formed, and a temperature at which the shape and dispersion state of the oxidized product (Y) can be controlled is preferable. In particular, a temperature near the melting point of the Li compound to be melted is preferable.
  • the holding time at this temperature can be appropriately selected depending on the size of the molded product and the throughput. Usually, 10 to 300 minutes are preferable.
  • the specific temperature in the step (C) is higher than the holding temperature in the step (B) and a temperature of 800 to 1100 ° C, preferably 900 to 1000 ° C.
  • This temperature is a temperature at which the oxide (X) and the oxidized product (Y) can be generated, and the above-described composite particles can be generated as necessary. If the temperature in this step is too high, the sintering reaction of the resulting oxide (X), oxide (Y) or composite particles proceeds, making it difficult to control the particle size and particle shape. Further, the Li component is volatilized and scattered, and the yarn balance may be impaired.
  • the holding time at the above-mentioned temperature in the step (C) may be a time sufficient to uniformly form the oxide (X) and the oxidized oxide (Y).
  • the length is too short, the homogeneity is impaired and sufficient effect cannot be obtained. Is not preferred because there is a fear that the composition balance may be impaired due to volatilization and scattering. Usually, it is preferably from 10 to 900 minutes, particularly preferably from 60 to 500 minutes. '
  • the non-aqueous electrolyte secondary battery of the present invention includes a positive electrode having a positive electrode active material powder, a negative electrode, and an electrolytic solution, and the positive electrode active material powder may include the positive electrode active material of the present invention.
  • the negative electrode and the electrolyte known ones can be used, and a nonaqueous electrolyte secondary battery can be obtained according to a conventional method.
  • the positive electrode active material of the present invention contains the oxides (X) and the oxides (Y) having specific compositions, the load characteristics of the nonaqueous electrolyte secondary battery are improved, and a high capacity can be realized.
  • the step (A) of forming the oxide (X) or a raw material component thereof and the oxide (Y) or the raw material component thereof together with a binder, and the step (A) are provided. Since the method includes a step (B) of holding the molded body at a specific temperature and a step (C) of holding the molded body at a specific temperature after the step (B), the positive electrode active material of the present invention can be efficiently and easily prepared. Obtainable. Since the nonaqueous electrolyte secondary battery of the present invention contains the positive electrode active material of the present invention as a positive electrode active material, It has excellent discharge capacity and is useful for lithium ion secondary batteries and the like.
  • a granulator (Fukae Patetechne) was used. And a high-speed mixer) to prepare granules having an average particle size of 10 mm.
  • the obtained granules were calcined at 700 ° C, which is higher than the melting point of lithium carbonate, for 60 minutes, and then calcined at 950 ° C for 180 minutes to obtain a particulate sintered product.
  • the obtained sintered product was examined using an ICP emission spectrometer, an X-ray diffractometer, an electron microscope, and ESCA.As a result, the primary particles were 0.2 to lzm and the secondary particles were Was.
  • the sintered product had LiYbO 2 uniformly dispersed on the surface of LiCoO 2 particles, and the content ratio of LiCoO 2 and LiYbO 2 was 99: 1 by weight.
  • the positive electrode active material particles obtained as a sintered product, acetylene black as a conductive additive, and PTFE as a binder were mixed at a weight ratio of 50:40:10 to form a positive electrode mixture.
  • a lithium metal negative electrode using a stainless steel plate as a current collector was fabricated.
  • lithium perchlorate was mixed at a ratio of ImolZl to a solution in which ethylene carbonate and dimethyl carbonate were mixed at a ratio of 1: 1 to prepare an electrolytic solution.
  • a lithium ion secondary battery was produced.
  • the initial discharge capacity of the obtained battery was measured under the conditions of a charge current density of 3 mAZcm 2 and a charge upper limit voltage of 4.3 V and a discharge lower limit voltage of 3 V. Table 1 shows the results.
  • a positive electrode active material particle and a lithium ion secondary battery were produced in the same manner as in Example 1 except that the amount of ytterbium oxide used was changed to 5.66 g, and the same evaluation was performed. The result See Table 1.
  • the obtained granules are calcined at 700 ° C, which is equal to or higher than the melting point of lithium carbonate, for 60 minutes, and then calcined at 950 ° C for 180 minutes to obtain a particulate sintered product.
  • a battery was obtained, and the same evaluation as in Example 1 was performed. Table 1 shows the results.
  • Example 3 in order to measure the effect of the initial discharge capacity on the content ratio of LiYbO 2 as the oxide (Y), the amount of LiYbO 2 added during the preparation of the standing product was adjusted, and the obtained positive electrode active material particles were obtained.
  • the positive electrode active material particles were prepared in the same manner as described above, except that the content ratio of LiYbO 2 therein was changed to 0.01 to 30% by weight. Content of LiYb0 2 obtained positive electrode active material was measured by IPC analysis.
  • a lithium ion secondary battery was prepared in the same manner as in Example 1 using each of the obtained positive electrode active materials, and the initial discharge capacity was measured. The results are shown in Figure 1. According to FIG.
  • the average primary particle diameter of LiYb0 2 particles in the resulting positive electrode active material is 0.01 ⁇ m, 0.05 mu m 0.1 / im, 0.2 m, ⁇ . ⁇ ⁇ m 0.7 m, 1.0 m, 1.5 2.0 ⁇ m 5 m, 10 ⁇ ⁇ , ⁇ ⁇ ⁇ ⁇ 20 m, 25 m and 30 m
  • Positive electrode active material particles were obtained according to the method described, and a lithium ion secondary battery was prepared, and each initial discharge capacity was measured. The result is shown in figure 2.
  • Positive electrode active material particles were obtained in the same manner as in Example 1, except that a compound of Gd, Ce or Sm was used instead of ytterbium oxide, and a lithium ion secondary battery was fabricated. Table 1 shows the results.
  • Example 8
  • LiYbO 2 prepared in the same manner as in Example 3, 84.6 g of lithium carbonate, 200 g of manganese oxide, and 4% by weight of PVA 7j ⁇ 3 ⁇ 4 of 40% by weight based on manganese oxide were uniformly mixed. Thereafter, granulation was performed to prepare a granulated product having an average particle size of 10 mm. The obtained granules were calcined at 700 ° C for 60 minutes or more, which is higher than the melting point of lithium carbonate, and then main-baked at 950 ° C for 180 minutes to obtain granular sintered products, as in Example 1. Then, a lithium-ion secondary battery was fabricated and the same evaluation was performed. Table 1 shows the results.
  • Example 8 one of the calcination temperature and the main calcination temperature was changed in the range of 300 to: LOO 0 ° C or 600 to 1300 ° C to produce a granular fired product and a lithium ion secondary battery.
  • the effect of the firing temperature on the initial discharge capacity was measured.
  • Fig. 3 shows the results of the change in the initial discharge capacity when the main firing temperature was changed
  • Fig. 4 shows the results of the change in the initial discharge capacity when the temporary firing temperature was changed.
  • the main firing temperature was preferably 800 to 1100 ° C.
  • the preliminary firing temperature was preferably 600 to 800 ° C.
  • Odani nickel, Odani cobalt and lithium carbonate are weighed so that the atomic ratio of lithium, cobalt, and nickel is 2: 1: 1, and they are uniformly mixed, and then oxygenated at 850 ° C for 8 hours. It fired in atmosphere to obtain a LiNi 0. 5 Co 0. 5 0 2 is an oxide (X).
  • LiNi 0 is Sani ⁇ (X) 9 to obtain a Mn 0. 02.
  • LiYbO 2 was added to each of the obtained oxidized products (X) such that the ratio of LiYbO 2 became 5% by weight to obtain a positive electrode active material.
  • the initial discharge capacity of the obtained positive electrode active material was measured in the same manner as in Example 1.
  • LiNi was used as the oxidant (X). . 5 Co. 145 mAhZg, LiNi when 5 O 2 is used. 9 Mn. , ⁇ 2 was 150 mAli / g.
  • LiYbO 2 as the oxide (Y) was not mixed, both were 135 mA.
  • a lithium ion secondary battery was produced in the same manner as in Example 1, except that a positive electrode active material composed of LiCoO 2 was used as the positive electrode active material (X), and the same evaluation was performed. Conclusion The results are shown in Table 1.
  • a lithium ion secondary battery was produced in the same manner as in Example 1, except that a cathode active material composed of LiMn 2 O 4 as oxide (X) was used as the cathode active material, and the same evaluation was performed. Table 1 shows the results. Acid tjm mm 300 cycle

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Abstract

L'invention concerne un matériau actif positif pour cellule secondaire à électrolyte non aqueux, qui comprend un oxyde (X) à base de lithium et au moins un élément de transition du groupe Co, Ni, Mn et Fe, et un oxyde (Y) représenté par LiLnO2. Ln est au moins l'un des éléments suivants: Y, Sc et métaux des terres rares trivalents. L'invention concerne également un procédé relatif à l'élaboration du matériau. L'invention concerne en outre une cellule secondaire à électrolyte non aqueux dotée d'une électrode positive, à base de poudre de ce matériau, dotée également d'une électrode négative, et renfermant par ailleurs un électrolyte. Le matériau actif positif améliore réellement les caractéristiques de charge de ce type de cellule, permettant la fabrication de cellules de capacité élevée.
PCT/JP2001/007406 2000-08-29 2001-08-29 Materiau actif positif pour cellule secondaire a electrolyte non aqueux, procede d'elaboration, et cellule secondaire a electrolyte non aqueux WO2002019449A1 (fr)

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JP2000-259532 2000-08-29
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JP2000259444 2000-08-29
JP2000-259444 2000-08-29
JP2000-372592 2000-12-07
JP2000372592A JP4965019B2 (ja) 2000-08-29 2000-12-07 非水電解液２次電池用正極活物質、その製造方法及び非水電解液２次電池

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005216651A (ja) * 2004-01-29 2005-08-11 Nichia Chem Ind Ltd 非水電解質二次電池用正極活物質、非水電解質二次電池用正極合剤および非水電解質二次電池
JP2005339886A (ja) * 2004-05-25 2005-12-08 Sanyo Electric Co Ltd 非水電解質二次電池

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008812A1 (fr) 2003-07-17 2005-01-27 Yuasa Corporation Materiau actif d'electrode positive et procede de fabrication associe, electrode positive pour cellule secondaire au lithium utilisant ce materiau et cellule secondaire au lithium
JP4967217B2 (ja) * 2003-12-08 2012-07-04 日本電気株式会社 二次電池用正極活物質、それを用いた二次電池用正極および二次電池
JP5619412B2 (ja) * 2009-09-04 2014-11-05 三洋電機株式会社 非水電解質二次電池および非水電解質二次電池の製造方法
WO2013002369A1 (fr) * 2011-06-30 2013-01-03 三洋電機株式会社 Pile rechargeable à électrolyte non aqueux et son procédé de production
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