Abstract: A negative electrode which includes graphite particles and which is capable of imparting superior input resistance characteristics to a nonaqueous lithium-ion secondary battery is provided. The negative electrode of a nonaqueous lithium-ion secondary battery disclosed herein includes graphite particles as negative electrode active materials and a supported material being supported by the graphite particles. The graphite particles have phenolic hydroxy groups. The supported material has surface hydroxy groups. A ratio of an amount B (mmol/g) of the surface hydroxy groups in the supported material to an amount A (mmol/g) of the phenolic hydroxy groups in the graphite particles is 30 or more and 150 or less.

Abstract: The disclosure provides an electrolyte solution that enables a lithium ion secondary battery to have reduced initial resistance, a small increase in resistance at high-temperature cycles, and reduced gas generation at high temperature. The electrolyte solution for a lithium ion secondary battery contains lithium difluorophosphate, an oxalic acid ion, and a compound (1) represented by the following formula (1): wherein R1 and R2 are each independently a methyl group, an ethyl group, a propyl group, or a butyl group.

Abstract: Provided is a nonaqueous electrolyte solution to which lithium tetraborate is added, for a lithium secondary battery, the nonaqueous electrolyte solution being capable of reducing the resistance of a lithium secondary battery. A nonaqueous electrolyte solution for a lithium secondary battery disclosed herein contains lithium tetraborate as a first additive, and a difluorophosphate salt as a second additive.

Abstract: Provided is an electrolyte solution for lithium secondary batteries that allows lowering the resistance of a lithium secondary battery, and suppressing characteristic degradation of the lithium secondary battery under high temperature. The electrolyte solution for lithium secondary batteries disclosed herein contains 0.05 mass % to 2.0 mass % of a compound represented by Formula (1) below. (In the formula, M+ represents a quaternary ammonium cation or a nitrogen-containing heteroaromatic ring cation, and R1 represents a C1-C5 alkyl group in which an ether oxygen is optionally inserted.

Abstract: Provided is a non-aqueous electrolytic solution for a lithium ion secondary cell that uses an additive that can suppress gas generation due to the decomposition of the non-aqueous electrolytic solution and has a low environmental risk. The non-aqueous electrolytic solution for a lithium ion secondary cell disclosed herein includes an electrolyte salt including a fluorine atom, a non-aqueous solvent capable of dissolving the electrolyte salt, and at least one heteroaromatic dicarboxylic acid anhydride selected from the group consisting of a compound represented by a following formula (I) and a compound represented by a following formula (II) as an additive (wherein, R1 to R7 are as defined in the specification).

Abstract: Provided is a non-aqueous electrolytic solution for a lithium ion secondary cell that can reduce the initial resistance of the lithium ion secondary cell and can suppress the increase in resistance when the lithium ion secondary cell is allowed to stand at high temperature. The non-aqueous electrolytic solution for a lithium ion secondary cell disclosed herein includes a light metal salt represented by the following formula (I) and a silyl sulfate compound represented by the following formula (II). The content of the light metal salt in the non-aqueous electrolytic solution for a lithium ion secondary cell is 0.1% by mass or more and 1.5% by mass or less. The content of the silyl sulfate compound in the non-aqueous electrolytic solution for a lithium ion secondary cell is 0.1% by mass or more and 5.0% by mass or less (each symbol in the formulas is as defined in the specification).

Abstract: A battery includes at least an electrode array and an electrolyte solution. The electrolyte solution contains at least a solvent and a supporting salt. The electrode array includes at least a positive electrode, a porous insulating layer, and a negative electrode. The porous insulating layer is interposed between the positive electrode and the negative electrode. The porous insulating layer contains at least a group of inorganic nanoparticles and a group of polymer particles. Each inorganic nanoparticle in the group of inorganic nanoparticles is a dielectric. Each inorganic nanoparticle in the group of inorganic nanoparticles is in contact with the electrolyte solution.

Abstract: Provided is an electrolyte solution for a lithium secondary battery, which can lower the resistance of a lithium secondary battery and impart the lithium secondary battery with high cycle characteristics. The electrolyte solution for a lithium secondary battery disclosed here includes an electrolyte salt consisting essentially of a lithium imide salt, a solvent containing methyl difluoroacetate, and an unsaturated carboxylic acid anhydride compound represented by formula (1) below as an additive (in the formula, R1 and R2 each independently denote a hydrogen atom, a fluorine atom, or an alkyl group that may be fluorine-substituted, or R1 and R2 bond to each other to form a ring structure).

Abstract: An engine cooling system (2) includes a first passage (11) communicating a radiator (8) with a jacket inlet (7) of a water jacket of an engine, a second passage (13) communicating a jacket outlet (12) of the water jacket with the radiator, and a third passage (16) communicating a part of the second passage with a part of the first passage located between the radiator and the water pump. To allow the cooling water temperature circulating in a water jacket of an engine to be detected accurately, a water temperature sensor (72) is provided in a part of the second passage intermediate between the part of the second passage where the third passage branches off and the jacket outlet.

Abstract: A battery is provided. The battery includes an electrode having a flat shape. The electrode is wound and includes a through hole. The through hole is further provided in a wound-back portion of the electrode.

Abstract: The present disclosure provides a nonaqueous electrolyte solution that is used in a nonaqueous electrolyte secondary battery. The nonaqueous electrolyte solution contains a fluorinated solvent, a predetermined additive A and a predetermined additive B. A ratio (CA/CB) of concentration CA (mol/L) of the additive A and concentration CB (mol/L) of the additive B lies in a range of 1 to 30.

Abstract: A nonaqueous electrolyte solution used for a nonaqueous electrolyte secondary battery includes a cyclic carbonate and a fluorinated carboxylate ester including two fluorine atoms on an alpha carbon atom derived from a carboxylic acid as a nonaqueous solvent.

Abstract: The present invention provides an electrolyte solution in which a decrease in capacity retention is suppressed and an increase in gas production is suppressed even when stored at high temperatures. Provided is an electrolyte solution containing: a compound (1) represented by formula (1): CF3CFX11COOR11, wherein X11 is a hydrogen atom, a fluorine atom, or a C1-C3 alkyl group in which hydrogen atoms are optionally replaced by fluorine atoms, and R11 is a C1-C3 alkyl group in which hydrogen atoms are optionally replaced by fluorine atoms; a fluorinated carbonate; and a cyclic acid anhydride.

Abstract: An engine cooling system (2) includes a first passage (11) communicating a radiator (8) with a jacket inlet (7) of a water jacket of an engine, a second passage (13) communicating a jacket outlet (12) of the water jacket with the radiator, and a third passage (16) communicating a part of the second passage with a part of the first passage located between the radiator and the water pump. To allow the cooling water temperature circulating in a water jacket of an engine to be detected accurately, a water temperature sensor (72) is provided in a part of the second passage intermediate between the part of the second passage where the third passage branches off and the jacket outlet.

Abstract: A nonaqueous electrolyte solution in which an electrolyte salt is dissolved in an organic solvent includes, includes at least one or more compounds selected from the silicon compounds represented by general formula (1), (2), or (3) below: (In the formulae, each of R1, R2, and R3 independently represents a C1-8 alkyl, C2-8 alkenyl, C2-8 alkynyl, or C6-8 aryl group; R4 represents a C1-8 alkylene, C2-8 alkenylene, C2-8 alkynylene, or C6-8 arylene group; and n represents 1 or 2. When n is 1, X represents a fluorine atom, trifluoromethyl group, C1-8 alkoxy group, C2-8 alkenyloxy group, C6-8 aryloxy group, or C2-8 acyloxy group, C1-8 sulfonyloxy group, isocyanato group, isothiocyanato group, or cyano group. When n is 2, X represents a C1-8 alkylene group, C1-8 alkylenedioxy group, C2-8 alkenylene group, C2-8 alkenylenedioxy group, C2-8 alkynylene group, C2-8 alkynylenedioxy group, C6-8 arylene group, C6-8 arylenedioxy group, C2-8 diacyloxy group, oxygen atom, or direct bond.

Abstract: A conductive material mixed composition obtained by synthesizing a piperidyl group-containing high-molecular-weight polymer or copolymer that is composed of the constitutional unit represented by general formula (1) below and insoluble in tetrahydrofuran (THF) by polymerization in a liquid phase, immediately followed by mixing a conductive material with the polymer or copolymer in the liquid phase: wherein R1 represents a hydrogen atom, a hydroxyl group, an oxyl radical, an alkyl group having 1 to 18 carbon atoms, or an alkoxy group having 1 to 18 carbon atoms; R2 and R3 each independently represent a hydrogen atom or a methyl group; R4 represents a hydrogen atom, an alkali metal atom, an alkyl group having 1 to 50 carbon atoms, an alkenyl group having 1 to 50 carbon atoms, an alkyl group having 1 to 50 carbon atoms, or a haloalkyl group having 1 to 50 carbon atoms; n represents a number of not less than 30; and m represents 0 or a positive number.

Abstract: A conductive material mixed composition obtained by synthesizing a piperidyl group-containing high-molecular-weight polymer or copolymer that is composed of the constitutional unit represented by general formula (1) below and insoluble in tetrahydrofuran (THF) by polymerization in a liquid phase, immediately followed by mixing a conductive material with the polymer or copolymer in the liquid phase: wherein R1 represents a hydrogen atom, a hydroxyl group, an oxyl radical, an alkyl group having 1 to 18 carbon atoms, or an alkoxy group having 1 to 18 carbon atoms; R2 and R3 each independently represent a hydrogen atom or a methyl group; R4 represents a hydrogen atom, an alkali metal atom, an alkyl group having 1 to 50 carbon atoms, an alkenyl group having 1 to 50 carbon atoms, an aralkyl group having 1 to 50 carbon atoms, or a haloalkyl group having 1 to 50 carbon atoms; n represents a number of not less than 30; and m represents 0 or a positive number.

Abstract: A nonaqueous electrolyte solution in which an electrolyte salt is dissolved in an organic solvent includes, includes at least one or more compounds selected from the silicon compounds represented by general formula (1), (2), or (3) below: (In the formulae, each of R1, R2, and R3 independently represents a C1-8 alkyl, C2-8 alkenyl, C2-8 alkynyl, or C6-8 aryl group; R4 represents a C1-8 alkylene, C2-8 alkenylene, C2-8 alkynylene, or C6-8 arylene group; and n represents 1 or 2. When n is 1, X represents a fluorine atom, trifluoromethyl group, C1-8 alkoxy group, C2-8 alkenyloxy group, C6-8 aryloxy group, or C2-8 acyloxy group, C1-8 sulfonyloxy group, isocyanato group, isothiocyanato group, or cyano group. When n is 2, X represents a C1-8 alkylene group, C1-8 alkylenedioxy group, C2-8 alkenylene group, C2-8 alkenylenedioxy group, C2-8 alkynylene group, C2-8 alkynylenedioxy group, C6-8 arylene group, C6-8 arylenedioxy group, C2-8 diacyloxy group, oxygen atom, or direct bond.

Abstract: A conductive material mixed composition obtained by synthesizing a piperidyl group-containing high-molecular-weight polymer or copolymer that is composed of the constitutional unit represented by general formula (1) below and insoluble in tetrahydrofuran (THF) by polymerization in a liquid phase, immediately followed by mixing a conductive material with the polymer or copolymer in the liquid phase: wherein R1 represents a hydrogen atom, a hydroxyl group, an oxyl radical, an alkyl group having 1 to 18 carbon atoms, or an alkoxy group having 1 to 18 carbon atoms; R2 and R3 each independently represent a hydrogen atom or a methyl group; R4 represents a hydrogen atom, an alkali metal atom, an alkyl group having 1 to 50 carbon atoms, an alkenyl group having 1 to 50 carbon atoms, an aralkyl group having 1 to 50 carbon atoms, or a haloalkyl group having 1 to 50 carbon atoms; n represents a number of not less than 30; and m represents 0 or a positive number.