Sumitomo Chemical Company, Limited

Tanaka Chemical Corporation

Jun-ichi Kageura

Hiroyuki Kurita

Yuichiro Imanari

Yusuke Maeda

Daisuke Yamashita

Takitaro Yamaguchi

Kimiyasu Nakao

Ryota Kobayashi

Chikara Murakami

Kenji Takamori

Takashi Arimura

Yasutaka Iida

Hiroyuki Ito

Takaaki Masukawa

Takuya Kadowaki

A positive electrode active material for lithium secondary batteries which is able to doped/undoped with lithium ions and contains at least Ni, in which a ratio P/Q (atom %/mass %) of a concentration P (atom %) of sulfur atoms being present in a surface of the positive electrode active material to a concentration Q (mass %) of sulfuric acid radicals being present in the whole positive electrode active material is more than 0.8 and less than 5.0, and the Q (mass %) is 0.01 or more and 2.0 or less.

Positive electrode active material for lithium secondary batteries, method of producing positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery

The present invention provides a positive electrode active material for an all-solid-state lithium-ion battery, an electrode, and an all-solid-state lithium-ion battery capable of smoothly exchanging lithium ions with a solid electrolyte at a positive electrode and improving battery performance. A positive electrode active material for an all-solid-state lithium-ion battery formed of particles includes crystals of a lithium metal composite oxide, in which the lithium metal composite oxide has a layered structure and contains at least Li and a transition metal, and the particles have an average crush strength of more than 50 MPa and satisfy Expression (1).1.0 &#x3bc;m&#x2264;&#x2003;&#x2003;(1)

Positive electrode active material for all-solid-state lithium-ion battery, electrode, and all-solid-state lithium-ion battery

A positive electrode active material for a lithium secondary battery includes secondary particles which are aggregates of primary particles that are capable of being doped and dedoped with lithium ions, in which the secondary particles have a total specific surface area of pores having a pore radius of 10 nm or more and 50 nm or less of 0.27 m/g or more and 0.90 m/g or less in a pore distribution measured by a mercury porosimetry method.

Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery

The present invention provides a positive electrode active material for lithium secondary batteries including: secondary particles obtained by aggregating primary particles capable of being doped and de-doped with lithium ions, in which the secondary particles have pores, and pore distribution obtained by a mercury intrusion method satisfies requirements (1) and (2) below:

Positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery

A positive electrode active material for a lithium secondary battery, including secondary particles formed by aggregation of primary particles capable of being doped and undoped with lithium ions, said positive electrode active material having: an &#x3b1;-NaFeOtype crystal structure represented by formula: Li[Li(NiCoMnM)]O(I), wherein 0&#x2264;x&#x2264;0.1, 0.7&#x3c;a&#x3c;1, 0&#x3c;b&#x3c;0.2, 0&#x2264;c&#x3c;0.2, 0&#x3c;d&#x3c;0.1, a+b+c+d=1, and M is at least one metal element selected from the group consisting of Fe, Cr, Ti, Mg, Al, Zr, Ca, Sc, V, Cr, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In and Sn; and a crystallite size &#x3b1;/crystallite size &#x3b2; ratio (&#x3b1;/&#x3b2;) of 1.60 to 2.40, wherein the crystallite size &#x3b1; is within a peak region of 2&#x3b8;=18.7&#xb1;1&#xb0; and the crystallite size &#x3b2; is within a peak region of 2&#x3b8;=44.4&#xb1;1&#xb0;, each determined by a powder X-ray diffraction measurement using Cu-K&#x3b1; radiation.

A positive-electrode active material for a lithium secondary battery includes: a secondary particle in which a plurality of primary particles of a lithium composite metal oxide are aggregated, in which the secondary particle has a void formed therein, and a through-hole that connects the void to a surface of the secondary particle, and satisfies predetermined requirements (i) to (iii).

Positive-electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery

A positive electrode active material for a lithium secondary cell, having a layered structure and comprising at least nickel, cobalt and manganese, the positive electrode active material satisfying requirements (1), (2) and (3) below: (1) a composition represented by a composition formula: Li[Li(NiCoMnM)]O, wherein 0&#x2264;x&#x2264;0.10, 0.30&#x3c;&#x3b1;&#x2264;0.34, 0.30&#x3c;&#x3b2;&#x2264;0.34, 0.32&#x2264;&#x3b3;&#x3c;0.40, 0&#x2264;&#x3b4;&#x2264;0.10, &#x3b2;&#x3c;&#x3b3;, &#x3b4;+&#x3b1;+&#x3b2;+&#x3b3;=1, M represents at least one metal selected from the group consisting of Fe, Cu, Ti, Mg, Al, W, Zn, Sn, Zr, Ga and V; (2) a secondary particle diameter of 2 &#x3bc;m or more and 10 &#x3bc;m or less; and (3) a maximum peak value in a pore diameter range of 90 nm to 150 nm in a pore diameter distribution determined by mercury porosimetry.

Positive-electrode active material for lithium secondary cell, positive electrode for lithium secondary cell, and lithium secondary cell

The present invention provides an electrode mixture, an electrode and a nonaqueous electrolyte secondary battery. The electrode mixture includes a lithium mixed metal oxide represented by formula (1):Li(NiMnM)O&#x2003;&#x2003;(1),an electrically conductive material, and a water-dispersible polymeric binder, wherein x is 0.30 or more and less than 1, y is 0 or more and less than 1, x+y is 0.30 or more and less than 1, z is 0.5 or more and 1.5 or less, and M represents one or more members selected from the group consisting of Co, Al, Ti, Mg and Fe.

Electrode mixture, electrode, and nonaqueous electrolyte secondary cell

A sodium secondary battery electrode having an collector and an electrode mixture containing an electrode active material, a conductive material, and a binder, and wherein: the electrode active material has a sodium-containing transition metal compound, the conductivity of the electrode mixture is 5.0&#xd7;10S/cm or more, and the density of the electrode mixture is 1.6 g/cmor more.

Sodium secondary battery electrode and sodium secondary battery

An electrode mixture containing a particulate electrode active material, an electrically conductive material and a binder, wherein the electrode active material comprises a particulate core material and a coating material adhering in the form of particles or a layer to the surface of the core material, the core material is obtained by a method comprising a step of coprecipitating two or more transition metal elements, and the binder comprises a water-soluble macromolecule or a water-dispersible macromolecule or both. An electrode comprising the electrode mixture and an electrode collector. An electrode mixture paste containing the electrode mixture and water. A nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the positive electrode is the electrode.

Electrode mix, electrode mix paste, electrode, and non-aqueous electrolyte secondary battery

The present invention provides an electrode mixture paste containing an electrode active material, a conductive material, a binder, and an organic solvent. The electrode active material has a sodium-containing transition metal compound, the binder has a polymer soluble to the organic solvent, and the polymer does not have a structural unit derived from vinylidene halide.

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Tsukuba, Japan

Jun-ichi Kageura