Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Sanyo Electric Co., Ltd.

Matsushita Electric Works, Ltd.

Hiroshi Kawada

Atsushi Fukui

Hiroyuki Matsumoto

Kosuke Kuroda

Hitoshi Yoshida

Kazuhiro Nobutoki

Mitsuhiro Hibino

Jun Ogihara

Shigeaki Tomonari

Masanao Kamakura

Masaaki Saito

Shuichi Nagao

Yoshiaki Honda

Yoshinori Kida

Yukinori Kuwano

Yoshifumi Watabe

Fumiharu Niina

Akiko Murata

Masanobu Takeuchi

Hiroshi Yamanaka

Masaru Yamano

Toshikazu Yoshida

Motoharu Saito

Souichi Sakai

Yoshiki Hayasaki

Takaaki Yoshihara

Yoshinori Aoki

Kenichi Hotehama

Tomoaki Matsushima

Takeo Shirai

Kazuo Sawada

Daisuke Nishide

Kenji Matsubara

Minoru Kumahara

Hiromichi Goto

Takahiro Miyatake

Takuya Sadakane

Yousuke Hagihara

Yoshiyuki Kajimoto

Kousaku Kitada

Tomoo Ohtsuka

Isao Nagaoka

A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention comprises: a lithium transition metal composite oxide which has a spinel structure; and a coating layer which is provided on the surface of the lithium transition metal composite oxide, while having a spinel structure, and which contains Li but does not contain Mn.

Positive electrode active material for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery

This positive electrode active material for nonaqueous electrolyte secondary batteries includes a lithium transition metal complex oxide that has a spinel structure and that is represented by general formula LiNiMnGeMO(in the formula, 0≤α<0.2, 0≤x<0.2, 0<y<0.45, and 0≤z<0.2 are satisfied, and M represents at least one element selected from the group consisting of Mg, Al, Sc, Ti, Cr, V, Fe, and Co). In a secondary particle of the lithium transition metal complex oxide, the mole number (Ge) of Ge at the surface portion when the total number of moles of metal elements other than Li is defined as 2 is larger than the mole number (Ge) of Ge at the center portion when the total number of moles of metal elements other than Li is defined as 2.

A secondary battery including a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes a carbon material electrochemically capable of absorbing and releasing lithium ions, and a solid electrolyte covering at least part of a surface of the carbon material and having lithium ion conductivity. The solid electrolyte includes a first compound represented by a general formula: LiM1O, where 0.5<x≤9, 1≤y<6, and the M1 includes at least one element selected from the group consisting of B, Al, Si, P, Ti, V, Zr, Nb, Ta, and La. The electrolytic solution includes a solvent and a lithium salt, and the solvent contains at least water.

Secondary battery

This lithium transition metal composite oxide, which configures a secondary battery positive electrode active material, is a composite oxide represented by general formula Li[LiMnCoMe]O(in the formula, Me is at least one species selected from Ni, Fe, Ti, Bi and Nb, and 0.5<α<1, 0.05<x<0.25, 0.4<y<0.7, and 0<z<0.25), and has at least one crystal structure selected from the O2 structure, the T2 structure and the O6 structure. The ratio (Co2/Co1) of the Co molar fraction (Co2) in the surface of the oxide to the Co molar fraction (Co1) in the entire lithium transition metal composite oxide is 1.2<(Co2/Co1)<6.0.

Secondary battery positive electrode active material, and secondary battery

A positive electrode active material for a secondary battery according to an embodiment contains: a first composite oxide component represented by general formula Li[LiMnCoMe]O(in the formula, Me is at least one selected from among Ni Fe, Ti, Bi, Nb, W, Mo, and Ta, 0.5<α<0.85, 0.05<x<0.2, 0.4<y<0.75, and 0<z<0.25), and having at least one crystal structure selected from among O2, T2, and O6 structures; and a second composite oxide component represented by general formula LiMOA(in the formula, M is at least one selected from among Ni, Co, Mn, Fe, Cu, Ti, Nb, Al, Ga, Bi, Zr, Ce, Y, W, Ta, Sn, Ca, Ba, and Na, A is at least one selected from among F, Cl, and S, 1.3<a<7, 2≤b<5, and 0≤c≤0.3).

Positive electrode active material for secondary battery, and secondary battery

Provided is a positive electrode active material including a first lithium oxide represented by LiNiAOA, where −0.5≤x≤0.3, 0≤y≤0.1, and 0≤z≤0.3. Here, at least one of y and z is not 0. Aincludes at least one selected from the group consisting of Ga, Bi, Ba, Y, Sn, Ca, W, and Ta. Aincludes at least one selected from the group consisting of halogen elements and S.

Positive electrode active material and secondary battery

A method for producing a negative electrode for a nonaqueous electrolyte secondary battery, and a nonaqueous electrolyte secondary battery obtained therewith are disclosed. The negative electrode includes a negative electrode current collector, a negative electrode active material layer provided on the surface of the negative electrode current collector, and a first film which has lithium ion permeability and which coats at least a portion of the surface of the negative electrode active material layer and partially coats the surface of the negative electrode current collector. The first film preferably contains a first lithium compound containing an element M, an element A, and lithium. Herein, Mis at least one selected from the group consisting of P, Si, B, V, Nb, W, Ti, Zr, Al, Ba, La, and Ta; and Ais at least one selected from the group consisting of F, S, O, N, and Br.

Negative electrode for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, and method for producing negative electrode for nonaqueous electrolyte secondary battery

A secondary-battery negative electrode includes: a negative electrode collector; and a negative electrode active material layer provided on a surface of the negative electrode collector, and the negative electrode active material layer includes active material particles and amorphous carbon which covers at least parts of surfaces of the active material particles. At least a part of a surface of the amorphous carbon is covered with a film having a lithium ion permeability, the film contains an element M, and the element M is at least one selected from the group consisting of P, Si, B, V, Nb, W, Ti, Zr, Al, Ba, La, and Ta.

Secondary-battery negative electrode and manufacturing method thereof, and secondary battery

A positive electrode for a secondary battery includes a positive electrode current collector and a positive electrode active material layer that contains a positive electrode active material particle and that is disposed on the surface of the positive electrode current collector. The positive electrode active material particle includes a positive electrode active material particle, a first coating that contains oxide X of metal element Mand that is attached to the surface of the positive electrode active material particle, and a second coating having lithium-ion permeability that is attached to the surface of the first coating. The second coating contains oxide Y represented by LiMO(0.5&#x2264;x&#x3c;4, 1&#x2264;y&#x3c;6), Mbeing at least one selected from a group consisting of B, Al, Si, P, S, Ti, V, Zr, Nb, Ta, and La.

Positive electrode for secondary battery, secondary battery, and method for producing positive electrode for secondary battery

A negative electrode for a nonaqueous electrolyte secondary battery includes a negative electrode current collector, a negative electrode active material layer provided on the surface of the negative electrode current collector, and a first film which has lithium ion permeability and which coats at least a portion of the surface of the negative electrode active material layer and partially coats the surface of the negative electrode current collector. The first film preferably contains a first lithium compound containing an element M, an element A, and lithium. Herein, Mis at least one selected from the group consisting of P, Si, B, V, Nb, W, Ti, Zr, Al, Ba, La, and Ta; and Ais at least one selected from the group consisting of F, S, O, N, and Br.

A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte having a lithium ion conductivity, and the negative electrode includes a negative electrode collector, a negative electrode active material layer provided on a surface of the negative electrode collector, and a coating film which at least partially covers a surface of the negative electrode active material layer and which has a lithium ion permeability. The coating film contains a lithium compound which contains an element M, an element A, an element F, and lithium; the element M is at least one selected from the group consisting of P, Si, B, V, Nb, W, Ti, Zr, Al, Ba, La, and Ta; and the element A is at least one selected from the group consisting of S, O, N, and Br.

Negative electrode including lithium and fluorine containing coating film covering negative electrode active material layer

A negative electrode active material for a nonaqueous electrolyte secondary battery includes secondary particles each formed of primary particles bonded to each other, and the primary particles contain carbon material particles and a lithium ion-conductive solid electrolyte which covers the surfaces of the carbon material particles.

Negative electrode active material for nonaqueous electrolyte secondary battery

A positive electrode plate () includes a current collector () and a mixture layer () disposed on the current collector (). The mixture layer () has a thin portion () with a thickness of less than 200 &#x3bc;m disposed on an inner coil half of the current collector () and a thick portion () having a larger thickness than the thin portion (), the thick portion () having a yield loop height H measured by a stiffness test of 6 mm&#x3c;H&#x3c;15 mm.

Positive electrode plates for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary batteries

An exemplary embodiment of the present disclosure resides in a positive electrode active material for non-aqueous electrolyte secondary batteries including a LiMnO&#x2014;LiMOsolid solution {M is at least one metal element} which shows two peaks in an X-ray diffraction pattern each having a peak top at a diffraction angle of 18&#xb0; to 19&#xb0; and satisfying 0.001&#x3c;R&#x3c;0.03, the Ris the ratio of the intensity B of one of the peaks on the higher angle side to the intensity A of the other peak on the lower angle side.

Positive electrode active material for non-aqueous electrolyte secondary batteries and non-aqueous electrolyte secondary battery

A transformer includes a multilayer board including insulation layers stacked in a thickness direction, a primary coil provided on at least one of the insulation layers, and a secondary coil provided on at least one of the insulation layers. The primary coil includes first sub coils electrically connected in series to each other, and second sub coils electrically connected in series to each other. Surfaces of the plurality of insulation layers constitute layer planes of the multilayer board. At least two of the first sub coils are provided on layer planes out of the layer plane different from each other. At least two of the second sub coils are provided on layer planes out of the layer planes different from each other. An average of positions of the first sub coils in the thickness direction is aligned with an average of positions of the second sub coils in the thickness direction.

Growing community of inventors

Hyogo, Japan

Hiroshi Kawada