Toyota Jidosha Kabushiki Kaisha

Hideyuki Yamamura

Hideki Nakayama

Yuhki Yui

Koji Takahata

Hiroyuki Yamaguchi

Akira Tsujiko

Shigeto Okada

Shingo Ohta

Jun-ichi Yamaki

Hironori Harada

Shin Ushiroda

Shigeru Fujino

Hideyasu Kawai

Seishu Komune

Yasuaki Yamaguchi

To provide an anode material configured to increase the reversible capacity of lithium ion secondary batteries, and a method for producing the anode material. The anode material is an anode material for lithium ion secondary batteries, comprising a P element and a C element and being in an amorphous state.

Anode material and method for producing the same

A composite solid electrolyte with excellent formability and chemical stability and high lithium ion conductivity. The composite solid electrolyte may comprise an oxide-based solid electrolyte and a sulfide-based solid electrolyte, wherein the oxide-based solid electrolyte is (Li, Al)(La)(Zr, M)O(where M is at least one element selected from the group consisting of Nb and Ta; Y is a number in a range of 0&#x2264;Y&#x3c;0.22; and Z is a number in a range of 0&#x2264;Z&#x2264;2), and wherein the sulfide-based solid electrolyte is VLiX-(1&#x2212;V)((1&#x2212;W)LiS-WPS) (where X is a halogen element; V is a number in a range of 0&#x3c;V&#x3c;1; and W is a number in a range of 0.125&#x2264;W&#x2264;0.30).

Composite solid electrolyte

The method for manufacturing a particulate electrode active material provided by the present invention uses a carbon source supply material prepared by dissolving a carbon source () for forming a carbon coating film in a predetermined first solvent, and an electrode active material supply material prepared by dispersing a particulate electrode active material () in a second solvent that is compatible with the first solvent and is a poor solvent with respect to the carbon source. The carbon source supply material and the electrode active material supply material are mixed and a mixture of the electrode active material and the carbon source obtained after the mixing is calcined, thereby forming a conductive carbon film derived from the carbon source on the surface of the electrode active material.

Method for manufacturing electrode active material

Provided is a lithium-ion secondary battery that uses a non-carbonaceous negative electrode active material capable of exhibiting capacitance properties. The lithium-ion secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The negative electrode includes a mica group mineral having at least one transition metal in its composition as a negative electrode active material.

Lithium-ion secondary battery

A lithium secondary battery provided by this invention has electrodes and configured in a structure in which active material layers, including active materials and binders, are held by collectors. The active material of at least one of the positive electrode and the negative electrode of the electrodes is formed from a metal compound which stores and releases lithium ions through conversion reactions. The lithium secondary battery includes a polyimide-base resin as a binder.

Lithium secondary battery and method of manufacturing same

A power storage device includes a fuel cell (), a battery holder () and an end plate () for sandwiching and binding the fuel cell, and an interposed member () disposed between the end plate () and the fuel cell (). The battery holder () and the end plate () are made of resin, and have a positive coefficient of thermal expansion at a temperature lower than a predetermined temperature. The interposed member () is formed to have a substantially negative coefficient of thermal expansion at a temperature lower than the predetermined temperature.

Power storage device usable at low temperatures

A negative-electrode active material characterized by containing a silicon oxide represented by a general formula SiO(0&#x3c;x&#x3c;2) and a silicate compound represented by a composition formula MSiO-m(OH)-n(H0), and a method for the production of a negative-electrode active material which includes a mixing step of mixing a silicon oxide that is represented by a general formula SiO(0&#x3c;y&#x3c;2) and a metal oxide, and a heat treatment step of performing a heat treatment on the mixture that is obtained in the mixing step in a non-oxidizing atmosphere and in which the negative absolute value of the standard Gibbs energy of the oxidation reaction of the metal oxide at the heating temperature in the heat treatment step is smaller than the negative absolute value of the standard Gibbs energy of the oxidation reaction of Si at the heating temperature in the heat treatment step.

Negative-electrode active material, and method for production of negative-electrode active material

A lithium secondary batteryprovided by this invention has electrodesandconfigured in a structure in which active material layersand, including active materials and binders, are held by collectorsand. The active material of at least one of the positive electrodeand the negative electrodeof the electrodes is formed from a metal compound which stores and releases lithium ions through conversion reactions. The lithium secondary batteryincludes a polyimide-base resin as a binder.

An electroactive material and a method of manufacturing the same is provided, in which the primary component of the electroactive material is a metal boron oxide complex, and the electroactive material exhibits excellent charge/discharge characteristics. The electroactive material of the present invention is primarily composed of an amorphous metal complex represented by the general formula MOO. M is one or two or more metal elements selected from the transition metal elements, e.g., Fe or V. In addition, x is 0&#x3c;x&#x3c;1, e.g., &#xbd;. This type of electroactive material can be manufactured by amorphizing the metal complex represented by the general formula MOOby means of a mechanical milling method. In addition, the electroactive material can be manufactured by rapidly cooling and solidifying a mixture containing an oxide in which M is a constituent metal element and a boron oxide from the melted state.

Growing community of inventors

Susono, Japan

Hideyuki Yamamura