Abstract: A nonaqueous electrolyte solution for a secondary battery includes: a nonaqueous solvent including a cyclic carbonate having at least one fluoro group on a side chain thereof, a chain carbonate, and trimethylacetonitrile; and a lithium salt dissolved in the nonaqueous solvent.

Abstract: To realize high capacity of batteries, an object of the invention is to provide nonaqueous electrolyte secondary batteries which are unlikely to become swollen when charged to a high voltage and allowed to stand in a high temperature atmosphere. The nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a nonaqueous electrolyte, and a separator disposed between the positive electrode and the negative electrode. An inorganic particle layer is disposed between the positive electrode and the separator or between the negative electrode and the separator. The inorganic particle layer contains a polymer with a polyethylene glycol group. The polymer with a polyethylene glycol group has an average molecular weight of not less than 200.

Abstract: A nonaqueous electrolytic solution for nonaqueous electrolyte secondary batteries includes a nonaqueous solvent and an electrolyte. The nonaqueous solvent includes a fluorinated carboxylate ester represented by the formula (1): where R1 and R2 are each any of H, F, CH3-xFx (x is 1, 2 or 3) and R3 is an optionally fluorinated alkyl group having 1 to 3 carbon atoms. The nonaqueous electrolytic solution further comprising lithium fluorosulfate salt (LiSO3F).

Abstract: [Object] To provide a positive electrode for a nonaqueous electrolyte secondary battery with which characteristics of the nonaqueous electrolyte secondary battery, such as a charge/discharge efficiency, a capacity retention ratio, and a discharge capacity retention ratio are not easily degraded even in the case where the nonaqueous electrolyte secondary battery is continuously charged at a high temperature. [Solution] A positive electrode 12 of a nonaqueous electrolyte secondary battery 1 includes a positive electrode active material layer 12b. The positive electrode active material layer 12b contains a positive electrode active material and a compound represented by a general formula (1): MH2PO2 (1). In the general formula (1), M represents a monovalent cation.

Abstract: A non-aqueous electrolyte secondary battery which is one example of an embodiment of the present disclosure is a non-aqueous electrolyte secondary battery including a non-aqueous electrolyte which contains a non-aqueous solvent. The non-aqueous solvent contains a fluoroethylene carbonate, a difluorobutylene carbonate, and at least one of a fluorinated chain carbonate and a fluorinated chain carboxylic acid ester, total volumetric contents of which is more than 50 percent with respect to the total volume of the non-aqueous solvent.

Abstract: In a nonaqueous electrolyte secondary battery including a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a nonaqueous electrolyte containing a lithium salt in a nonaqueous solvent, and a separator disposed between the positive electrode and the negative electrode, an inorganic particle layer is disposed between the positive electrode and the separator, and the nonaqueous solvent contains a chain fluorinated carboxylate ester represented by the formula CH3-XFX—CH2—COO—CH3 (where, x is an integer of 1 to 3) in an amount of 15% by volume or more based on the total amount of the nonaqueous solvent.

Abstract: There is provided a nonaqueous electrolyte that can suppress swelling of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte for a nonaqueous electrolyte secondary battery 1 contains a lithium salt, vinylene carbonate, and a compound represented by general formula (1) below. In the general formula (1), X is an alkylene group with 2 to 4 carbon atoms that may have a substituent. Rf is a fluorine-containing linear or branched alkyl group with 1 to 6 carbon atoms. R is a linear, branched, or cyclic alkyl group with 1 to 6 carbon atoms that may have a substituent.

Abstract: A nonaqueous electrolyte secondary battery as an example of an embodiment of the present disclosure includes a positive electrode, a negative electrode, and a nonaqueous electrolyte containing a nonaqueous solvent including fluoromethyl propionate. The lithium fluoride (LiF) adheres to a surface of the positive electrode and sulfur (S) compound adheres to a surface of the negative electrode and a proportion of fluorinated solvent is 55% by weight or more to a total weight of the nonaqueous solvent.

Abstract: A nonaqueous electrolyte solution for a secondary battery includes: a nonaqueous solvent including a cyclic carbonate having at least one fluoro group on a side chain thereof, a chain carbonate, and trimethylacetonitrile; and a lithium salt dissolved in the nonaqueous solvent.

Abstract: A non-aqueous electrolyte secondary battery which is one example of an embodiment of the present disclosure is a non-aqueous electrolyte secondary battery including a non-aqueous electrolyte which contains a non-aqueous solvent. The non-aqueous solvent contains a fluoroethylene carbonate, a difluorobutylene carbonate, and at least one of a fluorinated chain carbonate and a fluorinated chain carboxylic acid ester, total volumetric contents of which is more than 50 percent with respect to the total volume of the non-aqueous solvent.

Abstract: The present invention provides a non-aqueous electrolyte secondary battery wherein a reaction between a non-aqueous electrolyte and an electrode is suppressed and decrease in battery capacity under high temperature is restricted, so that long time excellent battery characteristics can be obtained. A non-aqueous solvent of the non-aqueous electrolyte contains: chain fluorinated carboxylic acid ester represented by the formula R1-CH2—COO—R2 where R1 represents hydrogen or alkyl group and R2 represents alkyl group and the sum of the carbon numbers of R1 and R2 is 3 or less, and in the case that R1 is hydrogen, at least one part of hydrogen in R2 is replaced with fluorine, and, in the case that R1 is alkyl group, at least one part of hydrogen in R1 and/or R2 is replaced with fluorine; and a film forming chemical compound decomposed in the range of +1.0 to 3.0 V based on an equilibrium potential between metal lithium and lithium ion.

Abstract: [Object] To provide a positive electrode for a nonaqueous electrolyte secondary battery with which characteristics of the nonaqueous electrolyte secondary battery, such as a charge/discharge efficiency, a capacity retention ratio, and a discharge capacity retention ratio are not easily degraded even in the case where the nonaqueous electrolyte secondary battery is continuously charged at a high temperature. [Solution] A positive electrode 12 of a nonaqueous electrolyte secondary battery 1 includes a positive electrode active material layer 12b. The positive electrode active material layer 12b contains a positive electrode active material and a compound represented by a general formula (1): MH2PO2 (1). In the general formula (1), M represents a monovalent cation.

Abstract: The present invention provides a positive electrode for a nonaqueous electrolyte secondary battery in which after continuous charge is performed, an increase in battery thickness is suppressed, and a residual capacity rate is increased by reduction in gas generation amount and also provides a method for manufacturing the positive electrode described above. This positive electrode includes a positive electrode collector and a positive electrode active material layer which contains a positive electrode active material and a phosphate salt represented by NaH2PO4 and which is formed on a surface of the positive electrode collector. In addition, on a surface of the positive electrode active material layer, a porous layer containing an inorganic oxide filler is preferably formed.

Abstract: There is provided a nonaqueous electrolyte that can suppress swelling of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte for a nonaqueous electrolyte secondary battery 1 contains a lithium salt, vinylene carbonate, and a compound represented by general formula (1) below. In the general formula (1), X is an alkylene group with 2 to 4 carbon atoms that may have a substituent. Rf is a fluorine-containing linear or branched alkyl group with 1 to 6 carbon atoms. R is a linear, branched, or cyclic alkyl group with 1 to 6 carbon atoms that may have a substituent.

Abstract: To realize high capacity of batteries, an object of the invention is to provide nonaqueous electrolyte secondary batteries which are unlikely to become swollen when charged to a high voltage and allowed to stand in a high temperature atmosphere. The nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, a nonaqueous electrolyte, and a separator disposed between the positive electrode and the negative electrode. An inorganic particle layer is disposed between the positive electrode and the separator or between the negative electrode and the separator. The inorganic particle layer contains a polymer with a polyethylene glycol group. The polymer with a polyethylene glycol group has an average molecular weight of not less than 200.

Abstract: Provided are a non-aqueous electrolyte secondary battery having excellent high-temperature durability and capable of reducing the initial percent defective and a process for producing the same. The non-aqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; negative electrode containing a negative-electrode active material; a non-aqueous electrolyte; and a porous layer provided on a surface of the positive electrode, wherein the porous layer contains inorganic solid electrolyte particles having a crystalline structure of rhombohedral crystal (R3c) with lithium ion conductivity represented by Li1+x+yAlxTi2-xSiyP3-yO12 (where 0?x?1 and 0?y?1) and an aqueous binder.

Abstract: The object is to obtain a positive electrode for a nonaqueous electrolyte secondary battery capable of suppressing gas generation even if continuous charging is performed at a high temperature. Provided is a positive electrode for a nonaqueous electrolyte secondary battery comprising a positive-electrode active material, wherein the positive-electrode active material has a surface-treated layer with a silane coupling agent represented by the following general formula (1): X1-Y—X2 ??(1) wherein Y is an alkylene group having 10 or less carbon atoms, and X1 and X2 are each represented by the general formula (2): wherein Z is an alkyl group having 10 or less carbon atoms or OR3, and R1, R2 and R3, are each an alkyl group having 5 or less carbon atoms.

Abstract: A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, a non-aqueous electrolyte, a separator interposed between the positive electrode and the negative electrode, and a porous layer provided on a surface of the positive electrode. The porous layer contains titania particles, a dispersing agent, and an aqueous binder. The dispersing agent includes silica having an average particle size of less than 100 nm and less than that of the titania particles.

Abstract: The present invention relates a nonaqueous electrolyte secondary battery with a porous layer containing inorganic particles formed on a surface of a positive electrode and provides a nonaqueous electrolyte secondary battery capable of reducing the incipient failure and having an excellent shelf life characteristic. The nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; a negative electrode containing a negative-electrode active material; a nonaqueous electrolyte; and a porous layer provided on a surface of the positive electrode, wherein the porous layer contains silica particles and an aqueous binder.

Abstract: A positive electrode for a nonaqueous electrolyte secondary battery, which has excellent nonaqueous electrolyte permeability, a nonaqueous electrolyte secondary battery including the positive electrode, and a method for producing the same. A positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode current collector, and a positive electrode active material layer. The positive electrode active material layer is formed on the positive electrode current collector and contains a positive electrode active material, a binder, and an acid anhydride.