Sumitomo Chemical Company, Limited

Tanaka Chemical Corporation

Tokyo Institute of Technology

Yuichiro Imanari

Kenji Takamori

Hiroyuki Kurita

Kenji Nakane

Daisuke Yamashita

Susumu Miyazaki

Cedric Pitteloud

Takaaki Masukawa

Jun-ichi Kageura

Yusuke Maeda

Hiroshi Inukai

Yoshihiro Kawakami

Maiko Saka

Yasutaka Iida

Kimiyasu Nakao

Hiroyuki Ito

Takayuki Kaneko

Ryoji Kanno

Taketsugu Yamamoto

Satoshi Shimano

Masaaki Hirayama

Kyousuke Doumae

Kensaku Horie

Takayoshi Ezuhara

Jun-Ichi Kageura

Satoru Kuze

Reiko Sasaki

Yoshiaki Honda

Akiyoshi Nemoto

Hiroshi Hamamatsu

Tomoya Kuroda

A lithium metal composite oxide powder including: secondary particles that are aggregates of primary particles, and single particles that are present independently of the secondary particles, wherein the lithium metal composite oxide is represented by composition formula (I), and the single particles have an average crushing strength exceeding 80 MPa:Li[Li(NiCoMnM)]O  (I)wherein M is one or more metal elements selected from the group consisting of Fe, Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, La and V, −0.1≤x≤0.2, 0≤y≤0.4, 0≤z≤0.4, and 0≤w≤0.1.

Lithium metal composite oxide powder, positive electrode active substance for lithium secondary battery, positive electrode, and lithium secondary battery

A positive electrode active material for lithium secondary batteries includes a lithium composite metal compound containing secondary particles that are aggregates of primary particles which are capable of being doped or dedoped with lithium ions and satisfies all of specific requirements (1) to (4).

Lithium nickel cobalt composite oxide positive active material, positive electrode, and lithium secondary battery using the same

The present invention provides a positive electrode active material precursor for a lithium secondary battery, in which the positive electrode active material precursor is represented by the following composition formula (I), a ratio (&#x3b1;/&#x3b2;) between a half width &#x3b1; of a peak that is present within a range of a diffraction angle 2&#x3b8;=19.2&#xb1;1&#xb0; and a half width &#x3b2; of a peak that is present within a range of 2&#x3b8;=38.5&#xb1;1&#xb0; is equal to or greater than 0.9 in powder X-ray diffraction measurement using a CuK&#x3b1; beam:NiCoMnM(OH)&#x2003;&#x2003;(I)[0.7&#x2264;x&#x3c;1.0, 0&#x3c;y&#x2264;0.20, 0&#x2264;z&#x2264;0.20, 0&#x2264;w&#x2264;0.1, and x+y+z+w=1 are satisfied, and M is one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Cr, Mo, W, Fe, Ru, Cu, Zn, B, Al, Ga, Si, Sn, P, and Bi].

Positive electrode active material precursor for lithium secondary battery, and method for manufacturing positive electrode active material for 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.

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

The object of the present invention is to provide a positive electrode active material usable for a lithium ion battery capable of high charge/discharge cycle performance and high discharge capacity. The positive electrode active material for a lithium secondary battery has a layered structure and comprises at least nickel, cobalt and manganese. Further, the positive electrode active material satisfies requirements (1) to (3) below: (1) a primary particle size of 0.1 &#x3bc;m to 1 &#x3bc;m, and a 50% cumulative particle size Dof 1 &#x3bc;m to 10 &#x3bc;m, (2) a ratio (D/D) of volume-based 90% cumulative particle size Dto volume-based 10% cumulative particle size Dof 2 to 6, and (3) a lithium carbonate content in a residual alkali on particle surfaces of 0.1% by mass to 0.8% by mass as measured by neutralization titration.

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

A positive electrode active material, which has a crystallite size &#x3b1;/crystallite size &#x3b2; ratio (&#x3b1;/&#x3b2;) of 1 to 1.75 or less, 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;=44.6&#xb1;1&#xb0;, each determined by a powder X-ray diffraction measurement using Cu-K&#x3b1; ray, and has a composition represented by formula (I) below:Li[Li(NiCoMnM)]O&#x2003;&#x2003;(I)wherein 0&#x2264;x&#x2264;0.2, 0.3&#x3c;a&#x3c;0.7, 0&#x3c;b&#x3c;0.4, 0&#x3c;c&#x3c;0.4, 0&#x2264;d&#x3c;0.1, a+b+c+d=1, and M is at least one metal selected from the group consisting of Fe, Cr, Ti, Mg, Al and Zr.

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

Provided is a positive electrode active material which is useful for a lithium secondary battery having a battery resistance lower than that of the conventional positive electrode active material below freezing point. The positive electrode active material for a lithium secondary battery contains at least one element selected from a group consisting of nickel, cobalt and manganese, the positive electrode active material having a layered structure and satisfying all of the following requirements (1) to (3): (1) a primary particle size is 0.1 &#x3bc;m to 1 &#x3bc;m and a secondary particle size is 1 &#x3bc;m to 10 &#x3bc;m; (2) in an X-ray powder diffraction measurement using CuK&#x3b1; radiation, a crystallite size in the peak within 2&#x3b8;=18.7&#xb1;1&#xb0; is 100 &#x212b; to 1200 &#x212b; and a crystallite size in the peak within 2&#x3b8;=44.6&#xb1;1&#xb0; is 100 &#x212b; to 700 &#x212b;; and (3) in a pore distribution obtained by a mercury intrusion method, a pore peak exists in a range where the pore size is 10 nm to 200 nm and a pore volume in the said range is 0.01 cm/g to 0.05 cm/g.

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

The present invention provides a method of producing a lithium mixed metal oxide, a lithium mixed metal oxide and a nonaqueous electrolyte secondary battery. The method includes a step of calcining a mixture of one or more compounds of M wherein M is one or more elements selected from the group consisting of nickel, cobalt and manganese, and a lithium compound, in the presence of one or more inactive fluxes selected from the group consisting of a fluoride of A, a chloride of A, a carbonate of A, a sulfate of A, a nitrate of A, a phosphate of A, a hydroxide of A, a molybdate of A and a tungstate of A, wherein A is one or more elements selected from the group consisting of Na, K, Rb, Cs, Ca, Mg, Sr and Ba. The lithium mixed metal oxide contains nickel, cobalt and manganese, has a BET specific surface area of from 3 m/g to 15 m/g, and has an average particle diameter within a range of 0.1 &#x3bc;m or more to less than 1 &#x3bc;m, the diameter determined by a laser diffraction scattering method.

Method for producing lithium composite metal oxide, lithium composite metal oxide, and nonaqueous electrolyte secondary battery

There is provided a method for producing an active material for a nonaqueous secondary battery, including firing an adherend in which a compound containing an element A (at least one element selected from among B, Al, Ga, In, Si, Ge, Sn, Mg and transition metal elements) is adhered to a particle surface of a material capable of being doped and dedoped with lithium ions, in a water-containing atmosphere so that weight increasing rate of the adherend is in a range of 0.1% by weight or more and 5.0% by weight or less, and firing the adherend.

Active material for nonaqueous secondary battery and method for producing same

The present invention provides a lithium composite metal oxide containing Li and at least one transition metal element, wherein at least one lithium composite metal oxide particle constituting the lithium composite metal oxide has both hexagonal and monoclinic crystal structures. Further, the present invention also provides a lithium composite metal oxide containing Li, Ni and M (where, M represents one or more kinds of transition metal elements selected from the group consisting of Mn, Co and Fe), having a diffraction peak (diffraction peak A) at an angle 2&#x3b8; in a range from 20&#xb0; to 23&#xb0; in a powder X-ray diffraction pattern of a lithium composite metal oxide which is obtained by powder X-ray diffraction measurement made in the condition that CuK&#x3b1; is used as a radiation source and the measurement range of diffraction angle 2&#x3b8; is in a range from 10&#xb0; to 90&#xb0;.

Lithium composite metal oxide and nonaqueous electrolyte secondary battery

The present invention provides a lithium mixed metal oxide, an electrode and a nonaqueous electrolyte secondary battery. The lithium mixed metal oxide is represented by the following formula (A):Li(MnNiFe)O&#x2003;&#x2003;(A)

Lithium-containing metal oxide, and non-aqueous electrolyte secondary battery

Disclosed is a lithium mixed metal oxide which is useful for a positive electrode active material that is capable of providing a nonaqueous electrolyte secondary battery having more excellent cycle characteristics, in particular, more excellent cycle characteristics during high-temperature operation at 60 DEG C. or the like. Specifically disclosed is a lithium mixed metal oxide represented by the following formula (A). Li(MnNiFe)O(A) (In the formula, x is not less than 0.9 and not more than 1.3; y is 0.46 or more and less than 0.5; and z is 0 or more and less than 0.1.) Also disclosed are: a positive electrode active material which comprises the lithium mixed metal oxide; a positive electrode which comprises the positive electrode active material; and a nonaqueous electrolyte secondary battery which comprises the positive electrode.

Lithium mixed metal oxide and positive electrode active material

The present invention provides an electrode active material, an electrode and a non-aqueous electrolyte secondary battery. The electrode active material contains the following powder (A) and powder (B): (A) a powder of a lithium mixed metal oxide that is represented by the following formula (1) and has a layered rock-salt type crystal structure, the powder having a BET specific surface area of from 3 m/g to 30 m/g,Li(NiMnFe)O&#x2003;&#x2003;(1)wherein x is within a range of more than 0 to less than 1, y is within a range of more than 0 to not more than 0.1, and x+y is within a range of more than 0 to less than 1;(B) a powder of a lithium mixed metal oxide that has a spinel type crystal structure. The electrode contains the electrode active material. The non-aqueous electrolyte secondary battery includes the electrode as a positive electrode.

Electrode active material comprising a mixture of a layered crystal structure material and a spinel crystal structure material, electrode, and non-aqueous electrolyte secondary battery

The present invention provides a transition metal phosphate and a production process thereof, a positive electrode, and a sodium secondary battery. The transition metal phosphate contains sodium (Na), phosphorus (P) and a transition metal element and having a BET specific surface area of 1 m/g to 50 m/g. The process for producing a transition metal phosphate comprises steps (1) and (2): (1) a step of bringing a phosphorus (P) source, a sodium (Na) source, an M source (M is one or more transition metal elements) and water into contact with each other, and obtaining a liquid material thereby, and (2) a step of separating water from the liquid material and obtaining a transition metal phosphate thereby.

Growing community of inventors

Tsukuba, Japan

Yuichiro Imanari