Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Osaka University

Kyoto University

Kyushu University

Shinji Nakanishi

Fuminori Mizuno

Jun Yoshida

Kazuhiro Suzuki

Shingo Ohta

Masanori Harata

Daichi Kosaka

Yasushi Morita

Koji Nishio

Masakazu Murase

Hiroyuki Yamaguchi

Shigeto Okada

Hiroshi Suyama

Yukinari Kotani

Tatsuya Eguchi

Ayuko Kitajou

Sanae Okazaki

Ryuichi Tsuji

Tomohiko Okugaki

Hirotoshi Imai

Yoshiharu Takasaya

Provided is a negative electrode active material that contains silicon clathrate II and that is suitable for a negative electrode of a lithium ion secondary battery. The negative electrode active material includes a silicon material in which silicon clathrate II represented by composition formula NaSi(0&#x2264;x&#x2264;10) is contained and a volume of a pore having a diameter of not greater than 100 nm is not less than 0.025 cm/g.

Negative electrode active material containing silicon clathrate II

Provided is a novel production method for producing silicon clathrate II. In the production method for producing silicon clathrate II, in a reaction system in which a Na&#x2014;Si alloy containing Na and Si and an Na getter agent coexist so as not to be in contact with each other, the Na&#x2014;Si alloy is heated and Na evaporated from the Na&#x2014;Si alloy is thus caused to react with the Na getter agent to reduce an amount of Na in the Na&#x2014;Si alloy.

Production method for producing silicon clathrate II

Provided are a battery separator with less voids, a lithium battery comprising the battery separator, and methods for producing them. A battery separator comprising an oxide electrolyte sintered body and a resin, wherein the oxide electrolyte sintered body has grain boundaries between crystal particles of a garnet-type ion-conducting oxide; wherein a number average particle diameter of the crystal particles is 3 &#x3bc;m or less; and wherein the oxide electrolyte sintered body satisfies the following formula 1:/()&#x2264;0.6&#x2003;&#x2003;Formula 1where Ris an intragranular resistance value that is an ion conductivity resistance inside the crystal particles, and Ris a grain boundary resistance value that is an ion conductivity resistance of the grain boundaries between the crystal particles.

Battery separator, lithium battery and methods for producing them

A battery with excellent output characteristics and stability. The battery comprising a cathode, an anode and a separator disposed between the cathode and the anode, wherein the cathode comprises an aqueous electrolyte and a cathode active material; wherein the anode comprises an anode active material; wherein the separator comprises a first oxide electrolyte sintered body and a resin; wherein the first oxide electrolyte sintered body has grain boundaries between crystal particles of a garnet-type ion-conducting oxide represented by a general formula (A); wherein a number average particle diameter of the crystal particles is 3 &#x3bc;m or less; and wherein the first oxide electrolyte sintered body satisfies the following formula 1: R/(R+R)&#x2264;0.6 where Ris an intragranular resistance value that is an ion conductivity resistance inside the crystal particles, and Ris a grain boundary resistance value that is an ion conductivity resistance of the grain boundaries between the crystal particles.

Battery

Provided is a method for manufacturing an anode active material particle having good lithium ion conducting property and good formability. The method for manufacturing an anode active material includes a first step of making a carbon particle with pores have contact with an ionic liquid having a lithium ion conducting property, and making the ionic liquid flow into the pores, and a second step of washing the carbon particle after the first step, while leaving the ion liquid inside the pores.

Ionic liquid filled porous carbon anode active material and method for manufacturing the same

The present invention is to provide a cathode active material configured to increase, when used in a lithium battery, the discharge capacity of the lithium battery higher than conventional lithium batteries, and a lithium battery including the cathode active material. Presented is a cathode active material for lithium batteries, wherein the cathode active material is represented by the following composition formula (1) and has a rock salt type crystal structure including formula (1): LiNiCoMnTiOwherein x and y are real numbers that satisfy x&#x3e;0, y&#x3e;0 and x+y&#x3c;1.

Cathode active material for lithium batteries, and lithium battery comprising the cathode active material for lithium batteries

Provided is an active material for a sodium ion battery including: (t-butyl)-trioxotriangulene shown below. In Formula (1), a double line including a solid line and a broken line represents a single bond or a double bond.

Active material for sodium ion battery, and sodium ion battery

Provided is an active material used for a sodium ion battery or a lithium ion battery, the active material including: (COONa)-trioxotriangulene represented by the following Formula (1) or (COOLi)-trioxotriangulene represented by the following Formula (2).  In Formulae (1) and (2), a double line including a solid line and a broken line represents a single bond or a double bond.

Active material, and sodium ion battery and lithium ion battery using the same

An object of the present invention is to provide a non-aqueous electrolyte air battery with large discharge capacity and excellent rate characteristics. Disclosed is a non-aqueous electrolyte air battery including an air cathode, an anode and a non-aqueous electrolyte present between the air cathode and anode, wherein the non-aqueous electrolyte includes an ionic liquid as the solvent, the ionic liquid including bis(fluorosulfonyl)amide as the anion portion.

Non-aqueous electrolyte air battery

The present invention is to provide an air cathode for air batteries, having excellent high-rate discharge performance, and an air battery comprising the air cathode. Disclosed is an air cathode for air batteries, using oxygen as an active material and configured to form an air battery comprising the air cathode, an anode and an electrolyte layer present between the air cathode and the anode, the air cathode comprising: a catalyst layer which contains at least an electrode catalyst and an electroconductive material; an oxide as the electrode catalyst, which is active against at least oxygen reduction reaction; and at least one kind of metal carbide as the electroconductive material, selected from the group consisting of a tungsten carbide, a titanium carbide and a molybdenum carbide.

Air cathode for air batteries and air battery

An air battery system may include an air battery cell containing an air cathode, an anode, a separator, and an oxygen gas supply for supplying an oxygen gas by bubbling to a liquid electrolyte. The air cathode may include an air cathode layer containing a conductive material, and an air cathode current collector for collecting current of the air cathode layer. The anode may include an anode layer containing an anode active material which stores and releases a metal ion, and an anode current collector for collecting current of the anode layer. The separator may be provided between the air cathode layer and the anode layer, wherein the air cathode layer and the anode layer may be constantly filled with the liquid electrolyte at a time of a change in a volume of the electrode caused by a discharge or a discharge and charge.

Air battery system

An air battery which can maintain a good performance and inhibit ingress of water into its housing. The air battery including a power section having an air electrode, an anode containing an alkali metal, and an electrolyte layer conducting ions between the air electrode and the anode; an oxygen-containing solvent showing both hydrophobic nature and oxygen solubility; a housing being configured to incorporate the power section and the oxygen-containing solvent; and an oxygen supply portion being configured to supply oxygen gas to the oxygen-containing solvent. The oxygen-containing solvent being arranged between the oxygen supply portion and the electrolyte layer.

Air battery including oxygen-containing solvent

An air battery system has a sealed air battery cell () having: an air electrode having an air electrode layer () containing a conductive material and an air electrode power collector () for collecting electric power from the air electrode layer; a negative electrode having a negative electrode layer () containing an negative electrode active material that adsorbs and releases metal ions and a negative electrode power collector () for collecting electric power from the negative electrode layer; a separator () provided between the air electrode layer and the negative electrode layer; and a sealed air battery case (). The air battery system also has a depressurization portion () that reduces the internal pressure of the sealed air battery cell to below the atmospheric pressure.

Air battery system and methods for using and controlling air battery system

A main object of the present invention is to provide a lithium air battery which can use different battery properties according to the current density at the time of discharge. The present invention attains the object by providing a lithium air battery comprising a cathode layer, an anode layer, and an electrolyte layer formed between the cathode layer and the anode layer, characterized in that the cathode layer further comprises a first cathode layer having at least oxygen reduction ability and a second cathode layer having at least Li ion storage ability, and the second cathode layer contains a cathode active material having an average voltage of less than 2.0 V (vs. Li) or an average voltage of more than 2.9 V (vs. Li).

Lithium air battery

A main objective of the present invention is to provide an air secondary battery which can suppress the deterioration in charge-discharge properties caused by the oxygen generated in an air cathode layer at the time of charge. The present invention solves the problems by providing an air secondary battery which comprises: an air cathode which has an air cathode layer containing a conductive material and an air cathode current collector which collects current of the air cathode layer; an anode which has an anode layer containing an anode active material and an anode current collector which collects current of the anode layer; and a permeation preventing layer which is formed on the surface of the side of the anode layer of the air cathode layer, made of a nonaqueous polymer electrolyte, and which prevents the permeation of the oxygen generated in the air cathode layer at the time of charge.

Growing community of inventors

Mishima, Japan

Shinji Nakanishi