Mitsui Minings & Melting Co., Ltd.

Hideaki Matsushima

Shinya Kagei

Tetsuya Mitsumoto

Toshikazu Matsuyama

Kyohei Yamaguchi

Yuji Hoshi

Yoshimi Hata

Hitohiko Ide

Norihiko Miyashita

Takashi Chikumoto

Daisuke Inoue

Kenji Matsuzaki

Daisuke Washida

Teruaki Yagi

Shinichi Obata

Makoto Dobashi

Susumu Takahashi

Takuya Yamamoto

Kiyotaka Yasuda

Koichi Miyake

Ayumu Tateoka

Tetsuhiro Matsunaga

Toshiko Yokota

Sakiko Tomonaga

Tomoyuki Maeda

Shinya Hiraoka

Fumiaki Hosokoshi

Masahiro Hyakutake

A solid electrolyte: (compound A) a compound that has a crystal phase having an argyrodite-type crystal structure and that is represented by LiPSX, where X is at least one elemental halogen, a represents a number of 3.0 or more and 6.0 or less, b represents a number of 3.5 or more and 4.8 or less, and c represents a number of 0.1 or more and 3.0 or less; and (compound B) a compound that is represented by LiX, where X is as defined above. The compound B has a crystallite size of 25 nm or more. The solid electrolyte preferably has a BET specific surface area of 14.0 m/g or less.

Solid electrolyte, and electrode mixture, solid electrolyte layer and solid-state battery, each using same

A solid electrolyte includes: (compound A) a compound that has a crystal phase having an argyrodite-type crystal structure and that is represented by LiPSX, where X is at least one elemental halogen, a represents a number of 3.0 or more and 6.0 or less, b represents a number of 3.5 or more and 4.8 or less, and c represents a number of 0.1 or more and 3.0 or less; and (compound B) a compound that is represented by LiX, where X is as defined above. The compound B has a crystallite size of 60 nm or less. The solid electrolyte according to the present invention preferably exhibits a lithium ion conductivity at 25° C. of 4.0 mS/cm or more.

A solid electrolyte contains a compound that has a crystal phase having an argyrodite-type crystal structure and that is represented by LiPSX, where X is at least one elemental halogen, a represents a number of 3.0 or more and 6.0 or less, b represents a number of 3.5 or more and 4.8 or less, and c represents a number of 0.1 or more and 3.0 or less. The proportion of the crystal phase with an argyrodite-type structure relative to all crystal phases constituting the solid electrolyte is 97.0 wt % or more. The compound has a lattice strain of less than 0.10%. The solid electrolyte preferably exhibits a lithium ion conductivity of 4.0 mS/cm or more.

Provided is a spinel-type lithium-manganese-containing complex oxide that is related to a 5 V-class spinel, and with which output characteristics and charge-discharge cycle ability can be enhanced while suppressing gas generation. Proposed is a spinel-type lithium-manganese-containing complex oxide comprising at least Li, Mn, O, and two or more other elements, and having an operating potential of 4.5 V or more with respect to a metal Li reference potential, wherein: D50 is 0.5 to 9 &#x3bc;m; a value of (|mode diameter&#x2212;D50|/mode diameter)&#xd7;100 is 0 to 25%; a value of (|mode diameter&#x2212;D10|/mode diameter)&#xd7;100 is 20 to 58%; a ratio of average primary particle diameter/D, which is calculated from an average primary particle diameter calculated from a SEM image and the D, is 0.20 to 0.99; and a primary particle is a polycrystal.

Spinel-type lithium-manganese-containing complex oxide

Provided is a new 5 V class spinel-type lithium manganese-containing composite oxide which enables the expansion of a high potential capacity region and the suppression of gas generation. The 5 V class spinel-type lithium manganese-containing composite oxide has an operating potential of 4.5 V or more at a metal Li reference potential, and contains Li, Mn, O and two or more other elements. The spinel-type lithium manganese-containing composite oxide is characterized in that, in an electronic diffraction image from a transmission electron microscope (TEM), a diffraction spot observed in the Fd-3m structure as well as a diffraction spot not observed in the Fd-3m structure are confirmed.

5V-class spinel-type lithium-manganese-containing composite oxide

A positive electrode active material comprising a lithium metal composite oxide having a layered crystal structure provides a novel lithium metal composite oxide powder which can suppress the reaction with an electrolytic solution and raise the charge-discharge cycle ability of a battery, and can improve the output characteristics of a battery. A lithium metal composite oxide powder comprises a particle having a surface portion where one or a combination of two or more ('surface element A') of the group consisting of Al, Ti and Zr is present, on the surface of a particle comprising a lithium metal composite oxide having a layered crystal structure, wherein the amount of surface LiOH is smaller than 0.10% by weight, and the amount of surface LiCOis smaller than 0.25% by weight; in an X-ray diffraction pattern, the ratio of an integral intensity of the (003) plane of the lithium metal composite oxide to that of the (104) plane thereof is higher than 1.15; and the amount of S obtained by a measurement using ICP is smaller than 0.10% by weight of the lithium metal composite oxide powder (100% by weight).

Lithium metal composite oxide powder

Provided is a new 5 V-class spinel-type lithium-manganese-containing composite oxide capable of achieving both the expansion of a high potential capacity region and the suppression of gas generation. Proposed is the spinel-type lithium-manganese-containing composite oxide comprising Li, Mn, O and two or more other elements, and having an operating potential of 4.5 V or more at a metal Li reference potential, wherein a peak is present in a range of 14.0 to 16.5&#xb0; at 2&#x3b8;, in an X-ray diffraction pattern measured by a powder X-ray diffractometer (XRD) using CuK&#x3b1;1 ray.

Relating to a 5 V-class spinel type lithium nickel manganese-containing composite oxide having an operating potential of 4.5 V or more with respect to a Li metal reference potential, the present invention proposes a composite oxide being capable of improving cycle properties while suppressing the amount of gas generation under high temperature environments and of increasing thermodynamical stability of a positive electrode in a fully charged state. Proposed is a spinel type lithium nickel manganese-containing composite oxide represented by a general formula [Li(LiNiMnTiAlM)O] (where 0&#x3c;a, 0&#x3c;b, 0.30&#x2264;y&#x3c;0.60, 0&#x3c;z, 0&#x2264;&#x3b1;, 2-a-b-y-z-&#x3b1;&#x3c;1.7, 3&#x2264;b/a&#x2264;8, 0.1&#x3c;b+z+&#x3b1;, 0&#x3c;z/b&#x2264;1, and M represents one or two or more metal elements selected from the group consisting of Mg, Fe, Co, Ba, Cr, W, Mo, Y, Zr, Nb, and Ce).

Spinel type lithium nickel manganese-containing composite oxide

The present invention relates to a positive electrode active material including a lithium metal composite oxide having a layer crystal structure, and provides a novel positive electrode active material for a lithium secondary cell, which can suppress the reaction with an electrolyte solution and can raise the charge-discharge cycle ability of the cell, and can make good the output characteristics of the cell. There is proposed a positive electrode active material for a lithium secondary cell, including an active particle having a surface portion where one or a combination of two or more (these are referred to as 'surface element A') of the group consisting of Al, Ti and Zr is present, on a surface of a particle including a lithium metal composite oxide having a layer crystal structure and represented by the general formula: Li1+xM1&#x2212;xO2 (wherein M is one or a combination of two or more (these are referred to as 'constituent element M') of the group consisting of Mn, Co, Ni, transition elements of from the third group elements to the 11th group elements of the periodic table, and typical elements up to the third period of the periodic table), wherein the ratio (CA/CM) of a concentration CA of the surface element A to a concentration CM of the constituent element M is higher than 0 and lower than 0.8, as measured by XPS; the amount of surface lithium impurity is smaller than 0.40% by weight; and in an X-ray diffraction pattern measured by XRD, the ratio (003)/(104) of an integral intensity of the peak originated from the (003) plane to an integral intensity of the peak originated from the (104) plane is higher than 1.15.

Positive electrode active material for lithium secondary cell

Proposed is a new sulfide-based solid electrolyte for lithium ion batteries, the sulfide-based solid electrolyte relating to a compound that has a cubic argyrodite type crystal structure and is represented by LiPSCl, and having excellent water resistance and oxidation resistance. Proposed is a sulfide-based solid electrolyte for lithium ion batteries, the sulfide-based solid electrolyte containing a compound that has a cubic argyrodite type crystal structure and is represented by compositional formula (1): LiPSCl, in which compositional formula, conditions: 0.8&#x2266;x&#x2266;1.7 and 0&#x3c;y&#x2266;&#x2212;0.25x+0.5 are satisfied.

Sulfide-based solid electrolyte for lithium ion batteries

Provided is a solid electrolyte with which charge/discharge efficiency and cycle characteristics can be increased by reducing the electron conductivity of a compound which has a cubic crystal structure belonging to a space group F-43m, and is represented by Compositional Formula: LiPSHa(Ha is Cl or Br). Proposed is a sulfide-based solid electrolyte for a lithium ion battery, which includes a compound having a cubic crystal structure belonging to a space group F-43m, and being represented by Compositional Formula: LiPSHa(Ha is Cl or Br), in which x in the above Compositional Formula is 0.2 to 1.8, and the value of the lightness L* thereof in the L*a*b* color system is 60.0 or more.

Sulfide-based solid electrolyte for lithium ion battery

An object of the present invention is to provide a copper foil excellent in softening resistance performance which reduces decrease in tensile strength after heat treatment at about 350&#xb0; C. to 400&#xb0; C. In order to achieve the object, a surface-treated copper foil provided with a rust-proofing treatment layer on both surfaces of a copper foil in which a rust-proofing treatment layer is constituted by zinc alloy, and the either rust-proofing treatment layer is a zinc alloy layer having zinc amount of 20 mg/mto 1,000 mg/m; and the copper foil contains one or two or more of small amount elements selected from carbon, sulfur, chlorine and nitrogen, and a sum amount thereof is 100 ppm or more is adopted.

Surface-treated copper foil

To provide a dielectric-layer-provided copper foil or the like for extremely improving the product yield while making the most use of the increase effect of an electric capacity of a thin dielectric layer using the sputtering vapor deposition method. In the case of dielectric-layer-provided copper foils respectively having a dielectric layer on one side of a copper foil, the dielectric layeris an inorganic-oxide sputter film having a thickness of 1.0 &#x3bc;m or less and formed on the one side of the copper foil in accordance with the sputtering vapor deposition method and the dielectric-layer-provided copper foils for respectively forming a capacitor layer, characterized in that a pit-like defective portion generated on the inorganic-oxide sputter film is sealed by polyimide resin are used.

Copper foil provided with dielectric layer for forming capacitor layer, copper clad laminate for formation of capacitor layer using such copper foil with dielectric layer, and method for manufacturing producing such copper foil with dielectric layer for formation of capacitor layer

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Takehara, Japan

Hideaki Matsushima