Toyota Jidosha Kabushiki Kaisha

Prime Planet Energy & Solutions, Inc.

Gunma University

Yohei Shindo

Akira Tsujiko

Takeshi Abe

Tomitaro Hara

Sachie Yuasa

Keiko Wasada

Daisuke Horikawa

Daisuke Teramoto

Takuichi Arai

Jun Yoshida

Mayuko Osaki

Hideyuki Koga

Masaru Kubota

Shinya Shiotani

Taishi Shiotsuki

Takeshi Usami

Manabu Imano

Hidenori Miki

Yoshitomo Takebayashi

Machiko Abe

Shin-ichi Tobishima

Hideyuki Morimoto

Sho Ando

Yoichi Koike

Maarit Karppinen

Mikko Nisula

Yusuke Shimo

The secondary battery current collector disclosed herein includes a resin layer, a first metal layer covering one main surface of the resin layer, and a second metal layer covering the other main surface of the resin layer. Each of the first metal layer and the second metal layer extend beyond an external side of the main surface of the resin layer. The secondary battery current collector has a resin-laminated part, in which the first metal layer, the resin layer, and the second metal layer are laminated; and a metal-laminated part, in which the first metal layer and the second metal layer are overlaid, on an external side of the resin-laminated part. A thickness of the metal-laminated part is greater than a total thickness of the first metal layer and the second metal layer in the thickest portion of the resin-laminated part.

Secondary battery current collector and manufacturing method for same, and secondary battery

The present disclosure provides a current collector of a secondary battery in which the current inside the battery is easily blocked at the time of inside short circuit, and in which the capacity retention rate and the decreasing rate of the electric resistance are outstanding. The current collector herein disclosed includes a laminate structure in which a resin layer and a metal layers formed on the both surfaces of the resin layer are laminated. The surface of the metal layer includes a rough surface part provided with a plurality of protruding parts and a plurality of recessed parts. On the rough surface part, a resin coat layer is formed, and at least one part of the protruding part among the plurality of protruding parts includes an exposed part that is exposed from the resin coat layer.

Current collector of secondary battery and secondary battery

A solid-state battery having a low heat generation amount and low resistance, and a method for producing the same. The solid-state battery is a solid-state battery comprising: a cathode comprising a cathode layer that contains an oxide-based cathode active material, an anode comprising an anode layer that contains an anode active material, and a solid electrolyte layer being disposed between the cathode layer and the anode layer and containing a solid electrolyte, wherein at least any one of the cathode layer and the solid electrolyte layer contains a sulfide-based solid electrolyte, and wherein the sulfide-based solid electrolyte comprises a high oxygen concentration layer on a contact surface with the oxide-based cathode active material, the high oxygen concentration layer having a higher oxygen element concentration than other parts except the contact surface.

Solid-state battery and method for producing the same

A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive and negative electrodes each include a current collector and a mixture layer formed on the surface of the current collector. The current collector includes a resin layer and metallic foils provided on both surfaces of the resin layer in at least one of the positive and negative electrodes. A surface of the metallic foils on which the mixture layer is formed is roughened. Furthermore, the average X (μm) of the thicknesses at the thinnest parts and the average Y (μm) of the thicknesses at the thickest parts of the metallic foil determined based on a plurality of obtained sectional SEM images in a stacked direction of the resin layer and the metallic foils satisfy the following relationship: 0.1 μm<X<4 μm, and 1.2≤Y/X.

Non-aqueous electrolyte secondary battery

A lithium ion secondary battery is disclosed that can inhibit generation of gas due to decomposition of a non-aqueous electrolyte solution. The lithium ion battery includes a cathode, a non-aqueous electrolyte solution and an anode, wherein the cathode includes a conductive material, a layered niobium-containing oxide that coats a surface of the conductive material, and a lithium-containing oxide active material having an upper-limit potential to a redox potential of metal lithium of no less than 4.5 V (vs. Li/Li).

Method for manufacturing lithium ion battery

A lithium ion secondary battery with a high capacity retention rate, and a method for producing the lithium ion secondary battery. The lithium ion secondary battery may comprise a cathode including a cathode active material layer comprising a cathode active material and LiPO, an anode including an anode active material layer comprising an anode active material, and an electrolyte layer being disposed between the cathode and the anode and comprising a liquid electrolyte, wherein a C1s element ratio obtained by X-ray photoelectron spectroscopy measurement of the LiPOis 18.82 at % or less.

Lithium ion secondary battery and method for producing the same

An all-solid-state battery having an olivine-type positive electrode active material and a sulfur solid electrolyte and a method for producing the all-solid-state battery is provided. The positive electrode active material is a positive electrode active material in which primary particles aggregate into secondary particles. The primary particles have an olivine-type positive electrode active material and a coating layer that coats all or a portion of the olivine-type positive electrode active material. The coating layer contains a transition metal derived from the olivine-type positive electrode active material, lithium, phosphorous and oxygen as components thereof, and the concentration of the transition metal is lower the concentration of the olivine-type positive electrode active material. A transition metal-containing sulfide region with a thickness of 10 nm or less and having sulfur and the transition metal derived from the olivine-type positive electrode active material is present on the surface of the secondary particles.

Positive electrode active material, all-solid-state battery and method for producing all-solid-state battery

The all-solid-state battery system that has an all-solid-state battery, the all-solid-state battery having a positive electrode active material layer, a solid electrolyte layer and a negative electrode active material layer, and a control device that controls the lower limit discharge potential of the positive electrode active material layer of the all-solid-state battery. The positive electrode active material layer and/or the solid electrolyte layer have a sulfide solid electrolyte. In addition, the positive electrode active material layer has an olivine-type positive electrode active material. In addition, the capacity of the negative electrode active material layer is lower than the capacity of the positive electrode active material layer. In addition, the control device controls the lower limit discharge potential of the positive electrode active material layer during normal use of the all-solid-state battery to within the range of 1.6 V vs. Li/Lito 2.1 V vs. Li/Li.

All-solid-state battery system

To provide a method for producing a positive electrode active material layer for lithium ion battery that can improve durability and internal resistance of lithium ion battery, and particularly lithium ion battery that operates at high voltage. The method for producing positive electrode active material layer for a lithium ion battery includes coating a substrate with positive electrode mixture slurry containing positive electrode active material, first lithium salt, second lithium salt and solvent, and drying off the solvent. First lithium salt is lithium phosphate, the second lithium salt is selected from the group including of lithium carbonate, lithium hydroxide, lithium nitrate, lithium acetate, lithium sulfate and combinations thereof, and the proportion of the second lithium salt with respect to the first lithium salt is 1 to 50 mol % based on the number of lithium atoms.

Method for producing positive electrode active material layer for lithium ion battery, and positive electrode active material layer for lithium ion battery

A method for producing a lithium phosphorus oxynitride layer having high ionic conductivity is provided. The method for producing a lithium phosphorus oxynitride layer on a substrate by atomic layer deposition comprises an atmosphere interchanging step, wherein the atmosphere surrounding the substrate is alternately switched between a first atmosphere, containing a first precursor such as a dialkyl phosphoramidate and/or alkyl phosphorodiamidate, and a second atmosphere, containing a second precursor such as a lithium hexaalkyl disilazide.

Method for producing lithium phosphorus oxynitride layer

A non-aqueous electrolyte secondary battery in which it is possible to increase a capacity retention rate is provided. A non-aqueous electrolyte secondary battery is provided which includes: a positive electrode layer that includes a positive electrode active material and a conductive material; a negative electrode layer; and a non-aqueous electrolytic solution that is arranged between the positive electrode layer and the negative electrode layer, where an upper limit voltage is equal to or more than 4.5 V with respect to the oxidation-reduction potential of lithium, and the surface of the conductive material is coated with a coating layer mainly formed of P, O, C and H.

An active material used for an electrochemical device utilizing Li ion conduction, and capable of improving cycle stability. The object is attained by providing an active material used for an electrochemical device utilizing Li ion conduction, including an active substance capable of absorbing and releasing a Li ion, and an Na ion conductor disposed on the surface of the active substance and having a polyanionic structure.

Active material and lithium ion battery

A positive electrode for a lithium secondary battery provided by the present invention includes a positive electrode active material layer having a particulate positive electrode active material constituted by a composite oxide containing lithium and at least one type of transition metal element, and at least one type of binding material constituted by a polymer compound having at least one functional group, and a conductive carbonaceous coating film is formed on a surface of the positive electrode active material. Further, the polymer compound constituting the binding material is molecularly bound to carbon atoms constituting the carbonaceous coating film of at least a part of the positive electrode active material, whereby a composite compound is formed from the polymer compound molecularly bound to the carbon atoms and a carbon network constituting the carbonaceous coating film containing the carbon atoms.

Method of manufacturing a positive electrode with a condensation reaction initiated by heating and reduced pressure

Provided is a lithium-ion secondary battery having an excellent initial capacity as well as a good capacity retention rate. The battery comprises a positive electrode comprising a positive electrode active material, a negative electrode comprising a negative electrode active material, and a non-aqueous liquid electrolyte. The negative electrode active material comprises a graphitic material that satisfies each of the following properties: (a) in its Raman spectrum obtained by Raman scattering analysis using an exciting light at a wavelength of 532 nm, having a ratio of its D-peak intensity Ito its G-peak intensity I, an R value (I/I), of 0.15 or smaller; and (b) having a full width at half maximum of the G peak, &#x394;v, of 23 cmor smaller. The secondary battery has a capacity retention rate of 70% or greater when subjected to 500 cycles of charging and discharging at a constant current rate of 2 C at 60&#xb0; C.

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Nisshin, Japan

Yohei Shindo