JPS5971262A - Non-aqueous electrolyte battery - Google Patents

Abstract

PURPOSE:To improve characteristics of non-aqueous electrolyte battery obtained by utilizing LiBF4 as a solute in such a case where the negative pole for which Li or Li alloy is used as the active substance and the positive pole for which FeS2 is used as the active substance are used. CONSTITUTION:This non-aqueous electrolyte battery comprises the negative pole for which Li or Li alloy is used as the active substance, the positive pole for which FeS2 is used as the active substance and the non-aqueous electrolyte consisting of one or more solvents and one or more solute. As this soluble, LiBF4 is used. This battery shows little increase of internal resistance even when it is stored under the high temperature and high humidity condition. Moreover, it excels in its discharge characteristic and ensures high application efficiency of active substance of positive pole.

Description

[Detailed Description of the Invention] Technical Field The present invention uses light metals such as lithium as negative electrode active materials.
This relates to taK, which uses a non-aqueous electrolyte in which an inorganic electrolyte is dissolved in an organic solvent as an electrolyte.

BACKGROUND TECHNOLOGY The active materials for this type of battery include metal oxides, sulfides,
Chloride or halogen carbon compounds have been proposed, and currently, 6V thread non-aqueous electrolyte batteries using manganese dioxide or fluorocarbon as the active material for the positive electrode have been put into practical use.

On the other hand, when oxidized steel, iron sulfide, iron disulfide, etc. are used as the iE electrode active material, the battery voltage is approximately 1.5V, and practical application is progressing because it is compatible with existing dry batteries, silver batteries, etc. There are n.

By the way, many non-alpha electrolytes have been proposed as the solute for this type of battery, with lithium perchlorate being a typical example, but the battery characteristics depend on the relative stability of the solute with respect to the positive electrode. There are many.

That is, even if a specific solute is stable and exhibits all the battery characteristics for a specific positive electrode, the battery characteristics may deteriorate when combined with other positive electrodes.

DISCLOSURE OF THE INVENTION The present invention uses lithium borofluoride + neem as the bath, especially when a negative electrode using lithium or lithium chloride as an active material, a positive electrode using iron disulfide as an active material, and a kumquat are used as the bath. This is based on the fact that it has been found that it is possible to obtain excellent battery characteristics, and according to the present invention, it is possible to provide a 1.5V non-aqueous electrolyte battery that has excellent battery characteristics.

Examples of the present invention will be described in detail below.

Correct &: Commercially available iron disulfide as active material, conductive agent (acetylene black and graphite), binder (fluororesin rotten wood) k
Mixed in a ratio of 85:10:5, the total amount of this mixture is approximately 1.1
Pressure molded with a pressure of 1.5 mm to create a diameter of 15 aψ and a thickness of 1.1 H.
After forming the pellet into a pellet, it is fired at a temperature of 250 to 60σC to form a positive electrode.

Negative electrode: A lithium plate is rolled to a thickness of approximately 0.6 IIs, and a diameter of 15 mm is punched out from this rolled plate to form a total negative electrode.

Non-aqueous electrolyte: hop ε trichium (LiBF4) as a solute in a mixed solvent of propylene carbonate and 1.2 dimethoxyethane! k 1 mol/l dissolved.

Figure 1 shows a complete vertical cross-sectional view of the battery of the present invention used, and 11) is in negative pressure contact. 17) Hapolypropylene nonwoven fabric, 0 separator, +s+H insulating backing.

For comparison, a nonaqueous electrolyte in which 1 mol/l of lithium perchlorate (Licj?'?4) k was dissolved as a solute in a mixed solvent of propylene carbonate and 1.2 dimethoxyethane was used. A comparative battery similar to the invention battery example was prepared.

FIG. 2 shows all the storage characteristics of the battery of the present invention (a) and the comparative battery (b) at high temperature and high humidity (60° C., 90%).

As is clear from FIG. 2, it can be seen that even when stored under high temperature and high humidity conditions, there is almost no increase in internal resistance and the storage characteristics of the tube according to the present invention are excellent.

Figure 6 shows propylene carbonate and 1.2 dimethoxyethane as solvents! :'The mixed bath section mixed at a ratio of 2:1 is completely fixed and the concentration of chikumu is t0.1.
Mol #so, 2 mol/1, 0.5 mol/l.

Temperature 20% when using all non-aqueous electrolytes (at, (b), (0), (d) and (e) changed to 1.0 mol/l and 1.5 mol/l, respectively) The discharge characteristics of the battery at load 1 at Ω are all shown, and from FIG. 6 it can be said that the concentration of lithium fluoride is preferably 0.6 mol/1 or more.

Also, is Figure 4 a solvent? Temperature 20℃, load tx when changed
The full discharge characteristics of the battery at oK are shown. (■) is a mixed solvent of propylene carbonate and 1.2 dimethoxyethane in a ratio of 2=1.
．． When using a non-aqueous electrolyte containing 65 mol/l, (1
) rr, monobutyl lactone, and 1.2 dimethoxyethane in a ratio of 2=1, and a non-aqueous electrolyte in which 0.6 mol/lfl of lithium was dissolved was used.

It can be seen that the mixed solvent of 1.2 dimethoxyethane and

Effects of the Invention As described above, according to the present invention, a 1,5V type non-aqueous electrolyte battery with excellent storage characteristics and discharge characteristics can be obtained. The industrial value of this product is extremely large.

[Brief explanation of the drawing]

@Figure 1 is a vertical cross-sectional view of the battery of the present invention, Figure 2 is a comparison diagram of the storage characteristics of the battery of the present invention and a comparison battery, and Figure 6 is a non-aqueous electrolyte with various solute concentrations. FIG. 4 shows the discharge characteristics of the batteries of the present invention used, and the discharge characteristics of the batteries of the present invention in which the solvent 'fe' was changed and the non-aqueous electrolyte was fully opened. il+... negative electrode, +21... negative electrode can, f4+...
・Positive electrode, 151...Positive electrode can, (7)...Separator, (81...Insulating backing.)

Claims (1)

[Scope of Claims] ■ A non-aqueous electrolyzer comprising a negative electrode made of lithium alloy as an active material, a positive electrode made of iron disulfide as an active material, at least one solvent, at least one solute, and a sword. 1. A non-aqueous electrolyte battery comprising: a non-aqueous electrolyte battery; ■ Is the concentration of the solute 0.67? 1. The non-aqueous electrolyte battery according to claim 0, wherein: (2) The nonaqueous electrolyte battery according to claim 0 or 0, wherein the solvent a is a mixed solvent of propylene carbonate and dimethoxyethane.