JPS62117271A - Non aqueous electrolyte cell - Google Patents

Abstract

PURPOSE:To improve the storing characteristic as well as the high rate discharge characteristic and the superior low temperature characteristic by employing dioxolane as a component of solvent composing a non aqueous electrolyte while adding 3,5-dimethyl isoxasol as a polymerization inhibitor into the non aqueous electrolyte. CONSTITUTION:Dioxolane is employed as a component of solvent comprising a non aqueous electrolyte while 3.5-dimethyl isoxasol is added by 0.005-0.5wt% against the dioxolane into the non aqueous electrolyte as a polimerization inhibiter. Since 3.5-dimethyl isoxasol is added by specially effective quantity or 0.005-0.5wt% against dioxolane as a polimerization inhibiter, polimerization of dioxolane can be blocked, resulting in improvement of storing performance as well as the high rate discharge characteristic and the superior low temperature characteristic.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides a non-aqueous silicone comprising a negative electrode using lithium as an active material, a positive electrode using manganese dioxide as an active material, and a non-aqueous solution. This is related to the disbanded basket pond.

(b) Conventional technology Metal oxides and halides have been proposed as positive electrode active materials for use in this type of battery, but among these materials, manganese dioxide in particular has a flat discharge voltage and is suitable for non-aqueous electrolytes. It has the advantage of being stable and inexpensive.

On the other hand, a non-aqueous electrolyte is composed of at least one solvent and at least one solute, and the solvent includes propylene carbonate, γ-butyrolagtone, dimethoxyedane, sulfolane, tetrahydrofuran, etc. Common examples include lithium chlorate, lithium chloride, and lithium chloride.

Therefore, in recent years, for example, special public interest
Dioxolane disclosed in Japanese Patent Publication No. 11890 or Japanese Patent Publication No. 58-56466 is attracting attention. Dioxolane has the advantages of higher solute solubility and lower viscosity at low temperatures than other solvents, so a non-aqueous electrolyte battery with excellent high rate discharge characteristics and low temperature characteristics can be obtained.

However, as dioxolane is stored, polymerization occurs and the viscosity of the electrolyte increases, making it difficult for the limousium ions to move, resulting in deterioration of petroleum properties.

In order to inhibit the polymerization of dioxolane, various 1-polymer inhibitors have been proposed.
As disclosed in Japanese Patent No. 73849 (/!), penzoquinone is an example, but sufficient effects have not yet been obtained.

(c) The objective of the present invention is to provide an inexpensive non-aquatic dissolution solution [a] which has the characteristics of high rate release, low temperature characteristics and storage characteristics.

B) Means for solving all problems The present invention provides a non-aqueous electrolyte comprising a negative electrode using lithium as an active material and a positive electrode using manganese dioxide as an active material. Dioxolane is used as a component of the solvent and non-aqueous 1! It is characterized in that 0.005 to 0.5% of 5,5-dimethylisoxazole is added as a polymerization inhibitor to dioxolane during solution solution.

(E) Effect According to the four songs of the present invention, 3,5-dimethylisoxazole as a polymerization inhibitor is added to dioxolane in an amount of 5 to 0.5% by weight of O, QO, which is an effective line. The heavy alloy of dioxolane can be inhibited, has high rate of Kitun properties,
In addition to superior low-temperature properties, storage properties are also improved.

(f) Example Examples of the present invention am will be described in detail below.

The positive electrode contains 85% by weight of manganese dioxide as an active material that has been heat-treated to remove moisture, 10mm% of carbon powder as a conductor, and fluorine as a material. Solid content: 4% by weight, polyvinyl bath liquid as a viscosity agent, polyvinyl content: 1
The kneaded product obtained by kneading % by weight was applied to 6 electrode plates and dried.

The negative electrode is a lithium rolled plate punched to a specified size, and a cylindrical non-aqueous tube with a diameter of 15 gates and a height of 40 mm is constructed using a spiral electrode body in which the positive and negative electrodes are spirally wound through a separator. I created an electrolyte battery, 1! Earth capacity is 1400m
It is AH.

And non-water which is the gist of the present invention? 4.As a solution, 0.5 mol/j of lithium perchlorate was dissolved in an equal volume mixed solvent of dioxolane and propylene carbonate,
Furthermore, 3,5-dimethylinxazole was added.

The drawing shows a pulse test in which the addition of 6,5-dimethylisoxazole to dioxolane is varied. The solid line is the initial discharge characteristic, and the broken line is the discharge characteristic after storage for 20 days at 60'C.

The discharge conditions are pulse discharge at -20℃, discharge current 1.2 people, ON for 6 seconds, OFF for 7 seconds, and the vertical axis of the drawing is pulse discharge until the battery voltage reaches 1.34V. Indicates the number of times.

From the drawings, it can be seen that when the amount of 3.5i/methylisoxazole added is in the range of 0.005 to 0.5% by weight based on dioxolane, the properties after storage are also excellent.

(g) Effects of the invention As mentioned above, a non-aqueous electrolyte is formed by dissolving 1 t and 112 v of electrolytic solution in a non-aqueous solution having a negative electrode using lithium as an active material and a positive electrode using manganese dioxide as an active material. By using dioxolane as a component of the solvent and adding 0.005 to 0.5% by weight of 3,5-dimethylisoxazole as a polymerization inhibitor to the non-aqueous electrolyte based on dioxolane, high rate release can be achieved. In addition to superior characteristics and low-temperature characteristics, storage characteristics can also be improved, which greatly contributes to expanding the use of this type of battery.

[Brief explanation of drawings]

Figure 2 is a diagram showing the relationship between the amount of 6,5-dimethylinxazole added to dioxolane and the number of pulse discharges.

Claims (1)

[Claims] (1) A negative electrode containing lithium as an active material, a positive electrode containing manganese dioxide as an active material, and a non-aqueous electrolyte consisting of at least one solvent and at least one solute, with dioxolone as one component of the solvent. 1. A nonaqueous electrolyte battery characterized in that 0.005 to 0.5% by weight of 3,5-dimethylisoxazole is added as a polymerization inhibitor to dioxolane in the nonaqueous electrolyte.