JPS598274A - Thionyl chloride-lithium battery - Google Patents

Abstract

PURPOSE:To effectively suppress voltage delay by using lithium covered with polysulfone film obtained by dipping lithium in a polysulfone solution and drying it. CONSTITUTION:A lithium negative electrode 4 is formed in such a way that the outer surface of lithium 10 is covered with polysulfone 11 by dipping lithium in methylene chloride containing 20% polysulfone and drying it in a dry box. Formation of passive film on the surface of the lithium electrode 4 during storage is prevented. This film is formed by thionyl chloride 6 containing 1.5M LiAlCl4, which acts as a positive active mass and an electrolyte. This results in prevention of voltage delay.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides 1Ef6 active material with thionyl chloride negative active material W (
Thionyl chloride lithium battery using lithium 1111
In step 1, cover the surface with a polysulfone film.
The present invention relates to a battery using a lithium battery which is characterized by ffl and T-threat.

With the diversification of electronic equipment due to the significant decline in electronic technology in 2000, the performance of the circuit board for batteries has also diversified, and Ag+U/Z
n, MnO2/Zn, +CF+n/LI,
Various types of Mn (Jg/Li, etc.) have been supplied to the market depending on their respective uses, and thionyl chloride lithium batteries (80012/Li batteries 9), etc. Its excellent performance, namely high energy density,
Output density, stability, f knee +'tV IK I ball, "Excellent storage 14 Table 1 raw i7+, li + nl I'l
:IIN r BLhii! , 'll rate 1jz 'fl
j: Because of its performance, it is one of the things that Ichikawa's 7 is based on lA.

However, this heavy oil is 1. Notice II 4 Two types of lithium horn 1 moe or 11
Snake! Lithium reacts with thionyl chloride during storage, and a high-resistance lithium chloride is deposited on its surface. Ichifusen 1I81 His membrane is generated, and the release 1 after the Hime period storage
18', there is a drawback that a significant drop in the 1-H limit ('R1 pressure delay) due to this high resistance occurs in the early stage, causing inconveniences in practical use, and the performance of this battery is The only drawback in terms of this is 1.

Many inventions have been made to eliminate this delay.

Considerations have been made, for example, by coating the lithium surface with a film of methyl cyanoacrylate or ethyl cyanoacrylate, or by coating the lithium surface with a film of vinyl chloride and vinyl oxide copolymer. By using the synergistic effect of lithium sulfide in thionyl chloride11, by utilizing its synergistic effect, the action of thionyl chloride on the surface of lithium chloride during storage can be prevented, and its binding 11" H methods such as preventing the generation of threatening fudo d model and preventing the spread of electricity 1F are here. (Methyl cyanoacrylate and ethyl cyanoacrylate are very adhesive as used in commercially available instant adhesives) However, sulfurized IJ CH'7A is highly hygroscopic and should be stored.

It has the disadvantage that it is extremely troublesome to handle.

The present invention overcomes these drawbacks and relates to a protective coating for the surface of lithium, which can be coated with a simple operation and which is capable of movably suppressing one type of electronic delay. ;4
11) The present invention is easy to handle, and lithium can be soaked in a suitable polysulfone solution8! The reaction between thionyl chloride and lithium during storage can be effectively prevented by covering it with a polysulfone film obtained by covering it and drying it and using it as a negative barrier. 1-7. It suppresses the formation of a passive film, and as a result, it eliminates the discharge delay after long-term storage, making it possible to produce 1 liter of 80C1z/Li battery with excellent discharge performance! i(: set/shito.

The following is an example of the present invention shown in the drawings),! ,, =
5ki1. Explanation 1-ru.

QE t tz, 1 is covered with a polysulfone coating made from unexploded 1413.) Using 1 capsule of 1413 unexploded polysulfone, this 111f suspension is 14m shoulder φ.

^Sa29 Silk 5 (JCI2/Li 'Battery no Mine ff1
This is a diagram.

In the figure, i'lUs 804 yo f) is the positive ← case,
(2) is a tlE made of Teflon and acetylene black.
(3) is a separator made of glass nonwoven 70, (4) is a lithium negative of the present invention, +51 is a negative 1 lead made of nickel, (6) is an IFμ moon paleomaterial. 1.5M of LIA (dC(14) containing thionyl chloride,
(7) also uses the 8U 88114 11-1 to trim the liquid injection pipe. The tip is M-fused and 5uS30
The case lid (8) made of No. 4 is insulated and hermetically sealed with a glass layer (9).

FIG. 2 is an enlarged sectional view of the lithium granite according to the present invention, in which the outer surface of lithium (10) is covered with polysulfone (11).
1) Tj, which was coated with lithium, immersed in lithium in 20% methylene chloride/IIW of polysulfone in a dry box, and then immediately pulled up and dried.
This is obtained by a similar operation.

Incidentally, the polysulfone coating 111A can be easily formed by dissolving lithium in methylene chloride on the side of the notebook, immersing lithium in the polysulfone solution, and then drying it. The solution is absorbed into methylene chloride.
Since it has poor Ill property, I11 can be adjusted in normal atmosphere.
Dealing with defeat is commercially easy.

Next, we will crystallize (8 (JO12/l, i battery (1 battery (B) made using Al and completely untreated lithium) at 60°C for example) IKΩ load during the day.

Fig. 3 shows a comparison of the initial discharge characteristics during free heating at a humidity of 25°C. It is clear from this that the battery according to the present invention exhibits excellent 3γL strength characteristics without any electric I-EIIII wax at the early stage of discharge.

M1: In order to indirectly investigate the relationship between the film thickness and efficacy of polysulfone, the concentration of polysulfone in methylene chloride r6 solution was
Polysulfone layers of various thicknesses were formed on the surface by immersing and drying lithium in a range of 40% to 40%, and forming ``ponds'' with the structure based on this example, which were the same as above. Conduct the test L) Examine Denou Yanen and see Figure 4 for Section II. 3 mera) lf Koga, +1 temple 1 if 4
The most important one is 15% to 30%:, t, i lfJ: range in order).

From this, the thickness of polythrough 11 and 4 and ``1ε
11-Is there a 17+l relationship between the delay suppression effect, F?
, t + so (S Aroga, IJ in polysulfone m liquid
Lithium in IE-f-Mujirushin (+4. protection mechanism is not clear) The effect of suppressing the spread of 'r1 by lithium fluoride is directly related to its elemental film 1' because it is obvious at a glance.

As is clear from the above, Kiku 6 Ming is 'TI1. Ll',
JI no spread 80 (Month 2/Li battery for '4' H@
IIFo, as it is, is extremely valuable.

[Brief explanation of the drawing]

Fig. 1 shows the use of lithium according to the present invention.
2 is a longitudinal cross-sectional view of a 2/1.1 battery; FIG. 2 is a partial cross-sectional view of lithium H- coated with a polysulfone coating according to the present invention; FIG. and conventional 1... lithium negative, 10...
lithium. 11 ...Polysulfono. Expression (metsu:) + village

Claims (1)

[Claims] A monolithium thionyl chloride battery, characterized in that the surface is coated with polysulfone resin and lithium is used as a negative commercially active material.