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.
摘要:
An inorganic compound with a specific inductive capacity not less than 12, is contained in a separator, a gelated electrolyte, a non-aqueous electrolyte, and an electrode. This improves the degree of ion dissociation of a lithium compound as an electrolytic salt contained in the non-aqueous solvent, the gelated electrolyte, and the electrolytic salt, while diminishing resistance against ion conduction to improve ion conductivity and while preventing crystallization in a low-temperature environment.
摘要:
An initial charging operation is carried out by a charging step composed of two-stages or more to improve an initial charging and discharging efficiency, reduce the charge of wasteful materials and improve a high capacity and a high cyclic characteristic without deteriorating various kinds of battery properties. In order to realize the improvements, a nonaqueous solvent which is decomposed under a potential higher than the reduction and decomposition potential of a main solvent is included in electrolyte. This charging method is a method for achieving the addition effect of such a nonaqueous solvent as much as possible. As a specific means, the electrolyte to which vinylene carbonate is added is employed and a constant-current and constant-voltage charge under about 3.2 V is carried out for 1 to 2 hours before a battery is completely charged. Thus, a good coat can be formed on the surface of an anode while suppressing the quantity of electricity required for forming the coat.
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 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 gel electrolyte in which nonaqueous electrolyte solution obtained by dissolving electrolyte salt containing Li in a nonaqueous solvent is gelled by a matrix polymer including a copolymer as a main component which contains vinylidene fluoride as a monomer unit. The copolymer employed as the matrix polymer is carboxylic acid modified polyvinylidene fluoride into which a structure formed by esterifying a part or all of a carboxyl group, a carboxylic acid or an acetic anhydride structure is introduced. The carboxylic acid modified polyvinylidene fluoride can dissolve and retain therein a solvent of low viscosity having a low boiling point. Therefore, the carboxylic acid modified polyvinylidene fluoride is used as a matrix polymer to improve the ionic conductivity of the gel electrolyte at low temperature. Thus, a low temperature characteristic is improved and a cyclic characteristic and a load characteristic are also improved.
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.