Gs Yuasa International Ltd.

National Institute of Advanced Industrial Science and Technology

Kyoto University

Maxell, Ltd.

Xiamen Tungsten Co., Ltd.

Kyoro University

Tadashi Kakeya

Manabu Kanemoto

Mitsuhiro Kodama

Tetsuo Sakai

Tetsuya Ozaki

Masaharu Watada

Minoru Kuzuhara

Daisuke Okuda

Zempachi Ogumi

Akiyoshi Nakata

Hideto Watanabe

Hajime Arai

Masanori Morishita

Yoshiteru Kawabe

Akihiro Fukushima

Ryo Sakuma

Kenichi Saito

Toshiyuki Nukuda

Toshiro Hirai

Seijiro Ochiai

Zhen Lin

Naohisa Kitazawa

Peng Zhang

Junichi Yamaki

Long Jiang

Wenlian Qian

Jinhong Yang

Aki Nakashima

Emi Kuromatsu

Katsuya Nishii

Ryuya Ochi

A method for producing a sulfide solid electrolyte according to an embodiment of the present invention is a method for producing a sulfide solid electrolyte, including: preparing a composition containing P, S, N, an element A, and an element M; reacting the composition to obtain an intermediate; and heating the intermediate to obtain a sulfide solid electrolyte, where the composition includes a raw material compound containing N, the element A, and the element M. A represents at least one element selected from the group consisting of Li, Na, and K. M represents at least one element selected from the group consisting of Al, Ta, Si, Sc, Mg, Nb, B, Hf, C, P, Zr, and Ti.

Method for producing sulfide solid electrolyte, sulfide solid electrolyte, all-solid-state battery, and method for selecting raw material compound for use in producing sulfide solid electrolyte

An aspect of the present invention is a sulfide solid electrolyte that contains at least one element M selected from the group consisting of Al, Si, B, Mg, Zr, Ti, Hf, Ca, Sr, Sc, Ce, Ta, Nb, W, Mo, and V, and N and has a crystalline structure. Another aspect of the present invention is a sulfide solid electrolyte that contains Al and N and that has a crystalline structure.

Sulfide solid electrolyte and all-solid-state battery

An electrochemical oxygen sensor with a long service life is provided. The electrochemical oxygen sensor according to the present invention includes a positive electrode, a negative electrode, and an electrolyte solution, and the electrolyte solution contains a chelating agent and ammonia, and a concentration of the ammonia in the electrolyte solution is 0.01 mol/L or higher. Citric acid is preferable as the chelating agent contained in the electrolyte solution. Also, the negative electrode preferably contains an Sn alloy.

Electrochemical oxygen sensor

An alkaline storage battery contains: a positive electrode; a negative electrode containing, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof; and an alkaline electrolyte. The alkaline electrolyte contains a compound which is a chain saturated hydrocarbon at least partially having a hydrophilic functional group other than a hydroxyl group and having a molecular weight of 400 or more and less than 220000 in an amount of less than 15 g per 100 mL of the electrolyte.

Alkaline storage battery

A layered electrode group according to the present invention includes a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the positive active material opposite to each other. The negative electrode plate is formed into a substantial U-shape by disposing two active material retaining portions retaining the negative active material opposite to each other. The positive electrode plate and the negative electrode plate are layered such that at least one active material retaining portion at the positive electrode plate is sandwiched between two active material retaining portions at the negative electrode plate.

Electrode plate, layered electrode group, and battery

A cylindrical battery includes a cylindrical battery case and a cylindrical electrode assembly arranged in the battery case and including a positive electrode, a negative electrode, and a separator. The electrode assembly has a slit extending from a first axial end to a second axial end.

Cylindrical battery and battery electrode structure

This disclosure provides a hydrogen storing alloy and a production method thereof. The hydrogen storing alloy has a chemical composition of a general formula RMgNi, wherein R is one or more elements selected from rare earth elements comprising Y, x satisfies 0.05&#x2264;x&#x2264;0.3, and y satisfies 2.8&#x2264;y&#x2264;3.8. The ratio of the maximal peak intensity present in a range of 2&#x3b8;=31&#xb0;-33&#xb0; to the maximal peak intensity present in a range of 2&#x3b8;=41&#xb0;-44&#xb0; is 0.1 or less (including 0), as measured by X-ray diffraction in which a Cu&#x2014;K&#x3b1; ray is set as an X-ray source.

Hydrogen storing alloy and production method thereof

A storage battery includes a negative electrode including, as an active material, at least one of a metal capable of forming a dendrite and a metal compound thereof, a positive electrode, a separator, and an electrolyte containing an additive. In the storage battery, a concentration of the additive in the electrolyte in a region on a side of the negative electrode defined by the separator is higher than a concentration of the additive in a region on a side of the positive electrode.

Storage battery

An alkaline storage battery includes a positive electrode, a negative electrode containing, as an active material, at least one of a metal capable of forming dendrites and a metal compound thereof, and an alkaline electrolyte solution, wherein a compound having a primary amino group and having no carboxyl group is contained in the alkaline electrolyte solution in an amount greater than or equal to 7% by volume.

An alkaline storage battery includes a spiral electrode group with a positive plate and a negative plate spirally wound with a separator interposed therebetween. The separator includes a plurality of sulfone group-containing regions. The plurality of sulfone group-containing regions are separated from one another in a winding direction, and disposed to face the positive plate or the negative plate.

Alkaline storage battery, and method for producing alkaline storage battery

Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 &#x212b; or less.

Hydrogen storage alloy, hydrogen storage alloy electrode, secondary battery, and method for producing hydrogen storage alloy

Disclosed is a negative electrode for an alkaline secondary battery, which can suppress elution of iron to improve the long-period storage property of the battery capacity even under conditions in which elution of iron in a substrate into an electrolyte solution tends to occur, and which can also suppress lowering of initial capacity and increase in internal resistance. Even under conditions in which the elution of iron in the substrate into an electrolyte solution tends to occur, including a case where there is a thin conductive protecting layer at the surface or where the conductive protecting layer has defects, by adding magnesium or a magnesium compound to the negative electrode for an alkaline secondary battery (excluding the case where magnesium is contained as a constituent element of a hydrogen storage alloy), the elution of iron can be suppressed, and thereby, the long-period storage property of the battery capacity can be improved and the lowering of the initial capacity and the increase in internal resistance can be suppressed.

Negative electrode for alkaline secondary battery, outer case for alkaline secondary battery and alkaline secondary battery

A battery includes a cylindrical battery case and an electrode group including a positive electrode, a negative electrode, and a separator. The electrode group and the battery case define a space communicated from a top to a bottom, and one of the positive electrode and the negative electrode has a current collecting terminal that extends from the electrode group in a direction away from a center axis of the battery case and is in contact with a bottom surface of the battery case.

Cylindrical battery

A nickel hydroxide for an alkaline secondary battery, wherein the nickel hydroxide contains &#x3b1;-nickel hydroxide particles and &#x3b2;-nickel hydroxide particles, and the ratio of the &#x3b2;-nickel hydroxide to the total amount of the nickel hydroxide is less than 75% by mass.

Nickel hydroxide for alkaline secondary battery and alkaline secondary battery

A battery includes: a cylindrical battery case; and an electrode body disposed in the battery case, and including a positive plate, a negative plate, and a separator disposed between the positive plate and the negative plate. A spacer formed of a dense body and an electrolyte storage space storing an electrolyte are provided between the electrode body and the battery case on one end or both ends of the battery case in an axial direction of the electrode body.

Growing community of inventors

Kyoto, Japan

Tadashi Kakeya