摘要:
The present invention uses a mixture of spherical carbonaceous materials having different average particle sizes as an anode active material in an anode composite mixture layer of an anode. The spherical carbonaceous material of large particle size decreases the reaction with non-aqueous electrolyte solution to suppress the decrease in battery capacity, form clearances having suitable sizes in the anode composite mixture layer, and retain the non-aqueous electrolyte solution. The clearances in the anode composite mixture layer are efficiently filled with the carbonaceous material of small particle size while spaces capable of suitably retaining the non-aqueous electrolyte solution are left unfilled. Thus, the volume density of the anode composite mixture layer is improved and the battery capacity is increased. Accordingly, energy density can be increased without deteriorating battery characteristics.
摘要:
A cell in which thermal welding of a laminate packaging is performed so that the thickness of a thermal welded portion including an electrode terminal is larger than that of a thermal welded portion including no electrode terminal.
摘要:
A nonaqueous electrolyte secondary battery includes a positive electrode; a negative electrode; and a nonaqueous electrolyte, wherein the negative electrode has a negative electrode mixture layer including a negative electrode active material; a polymer containing vinylidene fluoride as a repeating unit; a polymer containing acrylonitrile as a repeating unit; and a vapor-grown carbon fiber; and the nonaqueous electrolyte contains a fluorocarbon based polymer compound.
摘要:
A negative electrode for a non-aqueous electrolyte secondary battery is provided. The negative electrode includes: an electro-conductive base; a first layer provided on the electro-conductive base; and a second layer provided on the first layer. The first layer includes at least a graphitic material as a negative active material. The second layer includes at least a non-graphitizable carbonaceous material as a negative active material.
摘要:
A cell in which thermal welding of a laminate packaging is performed so that the thickness of a thermal welded portion including an electrode terminal is larger than that of a thermal welded portion including no electrode terminal.
摘要:
A secondary battery incoludes a positive electrode, a negative electrode including an anode active material layer formed on at least one side of a negative electrode current collector, an electrolyte, and a laminate-film casing member containing therein the positive electrode, the negative electrode, and the electrolyte. The electrolyte contains a non-aqueous solvent which includes a cyclic carbonic ester in an amount of 80 to 100%, based on a total weight of the non-aqueous solvent. The also contains an electrolyte salt in a concentration of 0.8 to 1.8 mol/kg. The anode active material layer contains a polymer which includes repeating units derived from vinylidene fluoride. A peel strength between the anode active material layer and negative electrode current collector is 4 mN/mm or more as measured after immersing the anode active material layer into a solvent.
摘要:
The present invention provides a gel electrolyte cell including a non-aqueous electrolytic solution containing lithium-containing electrolyte salt solved in a non-aqueous solvent and made into a gel state by a matrix polymer, and the gel electrolyte contains vinylene carbonate or derivative thereof in the amount not less than 0.05 wt % and not greater than 5 wt %. This gel electrolyte exhibits an excellent chemical stability with the negative electrode, strength, and liquid-retention characteristic. This gel electrolyte enables to obtain a gel electrolyte cell satisfying the cell capacity, cycle characteristic, load characteristic, and low-temperature characteristic.
摘要:
A battery capable of obtaining the superior battery performance is provided. An electrolyte is a gel electrolyte containing an electrolytic solution and a polymer compound. The polymer compound contains a ternary system copolymer containing vinylidene fluoride, hexafluoropropylene, and monomethylmaleic acid ester as a component. The copolymerization amounts of hexafluoropropylene and monomethylmaleic acid ester in the ternary system copolymer are respectively in the range from 4 wt % to 7.5 wt %, and in the range from 0.3 wt % to 2 wt %. Further, the weight average molecular weight of the ternary system copolymer is in the range from 0.6 million to 1.5 million. The liquid retaining characteristics of the electrolyte are improved. Therefore, the contact characteristics of the electrolyte to a cathode, an anode, and a separator are improved.
摘要:
A nonaqueous electrolyte has electrolyte salt dissolved in a nonaqueous solvent, wherein the ratio of the nonaqueous solvent having a ring structure is 50 wt % or more in all nonaqueous electrolyte solution components and the nonaqueous solvent includes at least one or more kinds of halogenated solvents expressed by a below-described general formula (1). (Here, at least one of R1 and R2 designates an alkyl group having the number of carbons of 4 or larger and at least one of them is a halogenated alkyl group). Thus, the decomposition of the halogenated solvent is suppressed.
摘要:
A solid electrolyte cell in which oxidative decomposition of electrolyte components is suppressed to maintain the superior cell performance. The solid electrolyte includes a negative electrode 9 having a negative electrode current collector 7 and a negative electrode active material 8, a positive electrode 12 having a positive electrode current collector 10 and a positive electrode active material 11 and a solid electrolyte 13 arranged between the negative electrode 9 and the positive electrode 12 and which is comprised of an electrolyte salt dispersed in a matrix polymer. A diene compound is contained in at least one of the positive electrode 12 and the solid electrolyte 13.