Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Nippon Chemi-con Corporation

Nobuhiro Ogihara

Katsuhiko Naoi

Shuichi Ishimoto

Masaki Hasegawa

Yukiyoshi Ueno

Osamu Hiruta

Norihiko Setoyama

Yoko Hase

Hitoshi Kumagai

Takao Inoue

Yuka Makino

An electricity storage device includes a negative electrode having a layered structure that includes an organic backbone layer containing an aromatic compound having an aromatic ring structure, the aromatic compound being in the form of dicarboxylate anions, and an alkali metal element layer containing an alkali metal element coordinated with oxygen in the dicarboxylate anions to form a backbone, a positive electrode that provides electric double-layer capacity, and a nonaqueous electrolyte solution provided between the negative electrode and the positive electrode, the nonaqueous electrolyte solution containing an alkali metal salt. The layered structure may be provided in layers by a &#x3c0;-electron interaction of the aromatic compound and may have a monoclinic crystal structure belonging to the space group P2/c. The positive electrode may contain activated carbon having a specific surface area of 1,000 m/g or more.

Electricity storage device

A power storage device electrode includes a layered structure having an organic framework layer containing aromatic dicarboxylic acid anions and an alkali metal element layer in which alkali metal elements are coordinated to oxygen atoms contained in the carboxylic acid anion to form a framework as an electrode active material, and in the whole of the electrode active material, a conductive material and a water-soluble polymer, carboxymethyl cellulose as the water-soluble polymer is contained in a range of 1.5 mass % or more and 3.5 mass % or less. In addition, the layered structure is produced by a spray drying method, and the peak intensity ratio when the power storage device electrode is subjected to X-ray diffraction measurement satisfies a predetermined range.

Power storage device electrode, power storage device, and method of producing power storage device electrode

An electricity storage device includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and an electrolyte that includes an organic crystal layer including a layered structure and an organic solvent introduced into the organic crystal layer and that is interposed between the positive electrode and the negative electrode to conduct alkali metal ions. The layered structure includes an organic backbone layer containing an aromatic dicarboxylic acid anion having an aromatic ring structure, and an alkali metal element layer containing an alkali metal element that is coordinated with oxygen contained in a carboxylic acid of the organic backbone layer to form a framework. At least one of the positive electrode and the negative electrode adsorbs and desorbs the ions to store and release electric charge.

The electrolyte according to the present disclosure is an electrolyte that conducts alkali metal ions and is used for producing an energy storage device. The electrolyte includes an organic crystal layer including a layered structure, the layered structure including an organic skeletal layer including aromatic dicarboxylic acid anions having an aromatic ring structure and an alkali metal element layer including an alkali metal element to which oxygen included in carboxylic acid anions of the organic skeletal layer are coordinated to form a skeleton, and an organic solvent charged in the organic crystal layer.

Electrolyte, energy storage device, and method for producing energy storage device

The nitrogen battery of the present disclosure includes a positive electrode that uses nitrogen as a positive electrode active material, a negative electrode, and an ion conducting medium that contains a silane compound and conducts alkali metal ions.

Nitrogen battery, fuel synthesizing apparatus, and fuel synthesizing method

A viologen compound is a crystalline compound including a heterocyclic moiety in which a carboxylate of an alkali metal is bound directly or indirectly to both ends of a basic skeleton containing 4,4&#x25a1;-bipyridinium and an anionic moiety that pairs with 4,4&#x25a1;-bipyridinium. The viologen compound can be used, for example, as a negative electrode active material for an electricity storage device including a negative electrode containing the negative electrode active material, a positive electrode containing a positive electrode active material capable of giving and receiving anions, and an ion-conducting medium that is disposed between the positive electrode and the negative electrode and conducts anions.

Viologen compound, method for producing the same, negative electrode active material, and electricity storage device

An electricity storage deviceincludes a positive electrode, a negative electrodecontaining a layered structure of an aromatic dicarboxylic acid metal salt as an electrode active material, and an ion conducting mediumcapable of conducting carrier ions. The layered structure is formed by spray-drying a solution prepared by containing aromatic dicarboxylic acid anions and alkali metal cations by using a spray-drying apparatus.

Electrode active material, electrode for electricity storage device, electricity storage device, and method for producing electrode active material

The carbon porous body of the present disclosure includes micropores and mesopores. A micropore volume determined at a temperature of 77K by as plot analysis of a nitrogen adsorption isotherm is 100 (cm(STP)/g) or more. A BET specific surface area determined from the nitrogen adsorption isotherm is 1,000 m/g or more. The derivative of the nitrogen adsorption isotherm is 300 (cm(STP)/g) or more over the range where relative pressure P/Pin the nitrogen adsorption isotherm is from 0.10 to 0.20 inclusive, and the derivative of the nitrogen adsorption isotherm is 200 (cm(STP)/g) or more over the range where the relative pressure P/Pin the nitrogen adsorption isotherm is from 0.20 to 0.95 inclusive. The amount of nitrogen adsorbed when the relative pressure P/Pin the nitrogen adsorption isotherm is 0.98 is 1,200 (cm(STP)/g) or more.

Carbon porous body, method for producing the same, electrode for storage device, and storage device

An electrode active material of the present invention is made of a layered composition including organic backbone layers containing an aromatic compound that is a dicarboxylic acid anion having a naphthalene backbone; and alkali metal element layers containing an alkali metal element coordinated to oxygen contained in the carboxylic acid anion to form a backbone. The layered composition has an interplanar spacing between (002) planes of 0.42400 to 0.42800 nm, an interplanar spacing between (102) planes of 0.37000 to 0.37600 nm, an interplanar spacing between (211) planes of 0.32250 to 0.32650 nm, and an interplanar spacing between (112) planes of 0.30400 to 0.30700 nm, as measured by X-ray diffraction. Preferably, the layered composition has an interplanar spacing between (200) planes of 0.50500 to 0.50950 nm as measured by X-ray diffraction.

Electrode active material, nonaqueous secondary battery electrode, and nonaqueous secondary battery

A nonaqueous secondary battery electrode contains, as an electrode active material, a layered composition including organic backbone layers containing an aromatic compound that is a dicarboxylic acid anion having two or more aromatic ring structures and having the two carboxylic acid anions of the dicarboxylic acid anion bonded to diagonally opposite positions of the aromatic compound and alkali metal element layers containing an alkali metal element coordinated to oxygen contained in the carboxylic acid anion to form a backbone. The nonaqueous secondary battery electrode is preferably used as a negative electrode. In addition, the layered composition is preferably formed in layers by &#x3c0;-electron interaction of the aromatic compound and has a monoclinic crystal structure belonging to the space group P2/c.

Nonaqueous secondary battery electrode, nonaqueous secondary battery including the same, and assembled battery

A negative electrode for a lithium secondary battery includes a negative-electrode active material having a specific surface area of Sx (m/g) and an average particle size of Lx (&#x3bc;m), a fibrous conductive material having a specific surface area of Sy (m/g) and an average length of Ly (&#x3bc;m), and a granular conductive material having a specific surface area of Sz (m/g) and an average particle size of Lz (&#x3bc;m), in which letting the negative-electrode active material content be X, letting the fibrous conductive material content be Y, and letting the granular conductive material content be Z, Log((SyY+SzZ)/SxX&#xd7;10)&#xd7;Log((LyY+LzZ)/LxX&#xd7;10) is defined as an electrode parameter, and the electrode parameter satisfies Log((SyY+SzZ)/SxX&#xd7;10)&#xd7;Log((LyY+LzZ)/LxX&#xd7;10)&#x2267;0.

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Nagakute, Japan

Nobuhiro Ogihara