JPS598275A - Thionyl chloride-lithium battery - Google Patents

Abstract

PURPOSE:To prevent reaction between thionyl chloride and lithium and suppress formation of passive film of lithium chloride during storage to eliminate voltage delay and obtain good discharge performance after long storage by using a lithium electrode covered with polyether sulfone film obtained by dipping lithium a polyether sulfone solution and drying it. CONSTITUTION:A lithium negative electrode 4 is formed in sucha way that the outer surface of lithium 10 is covered with polyether sulfone 11 by dipping lithium in methylene chloride solution containing 5% polyether sulfone and drying it in a dry box. Formation of a positive 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 1FI with thionyl chloride as an active substance and a negative active substance i.
Lithium thionyl chloride using lithium for N 11 r
1. A lithium negative 1.0 liter is coated with a polyether sulfono film on its surface. +1f: Regarding batteries.

In recent years, with the diversification of quasi-electronic devices due to advances in advanced electric technology, the performance requirements for Yami 411 have also diversified, and Ag 20
/Zn, Mn(J2/Zn, +cF+n
/Li, un(Jt /Li etc.1)
There are 11 batteries on the market in Okawa according to their respective uses.
River 2/Li battery) Momoko, its excellent resistance II, that is, high energy +q +! , output fuhen, an'iU
1 higher '1 KIE, excellent storage performance, but 1 temperature f't: ii Hi, μ41 TrV? l;: One of the most popular products in the market due to its performance.
J+ru.

However, in this song, the lithium negative insult +[1Ji
Because it is in contact with thionyl chloride, which also acts as a ``if IvlW'', lithium reacts with the salt 11thionyl during storage, and a high-resistance lithium chloride non+l is formed on its surface. The disadvantage is that a black film is formed, and during the discharge period after long-term storage, there is a significant electron drop (48) due to the high resistance of this film, which makes practical use extremely inconvenient. This was the only drawback with battery performance of +111.

Since then, many inventions have been made to eliminate this kind of electronic delay.

4y has been done, for example, by covering Ri + j with a film of methyl cyanoacrylate or ethyl cyanoacrylate, etc., and covering the surface of the T or lithium with a film of vinyl oxide and vinyl oxide copolymer. 7. By using lithium sulfide in history Iζ thionyl chloride and its synergistic effect as 1.(1, IIJ 1
It is not possible to use methods such as inhibiting the action of 5-thirryl, preventing the formation of phlegm, and preventing the spread of phlegmon. However, rA is C, methyl noanoacrylate and ethyl noanoacrylate are commercially available 1
Lithium sulfide is very hygroscopic, as it is in the 141 fl blue agent (141), and it is difficult to handle. T-rice has the disadvantage that its storage and handling are complicated and cumbersome.

The present invention eliminates these drawbacks, and
The present invention relates to a protective temporary placement of a lithium surface that can be coated with a lithium ion oxide and can effectively suppress IF1 Onobe. That is, the present invention has 1 + DI 11
11J1, suitable! (It can be obtained by simply soaking lithium in a polyether sulfonate solution and then drying it.) By covering it with a polyether sulfonate film and using lithium negative 1, it is possible to remove thionyl chloride during storage. Effectively prevents the reaction of lithium: L, suppresses the formation of an immobile tIM film of lithium chloride, and its formation after long-term storage.
Le1i'1117. 1tF, 7.5OC
12/Li-i Pond.

l-St-Kizumi Akira Kazumi and others
--The surface is covered with tellurinone 6 times.
i, i diagram. (1) in M is formed from 8is 804 by 11 yo 1ii9 'r 2 .

(2) Hachifuron and Ayachi Renovator Tsuku J: '11
+I: Compensatory day off for city hall, (3) glass non-woven city, L separator.

(4) is a lithium negative lead made of nickel, (5) is a negative lead made of nickel, and (6) works as a positive active material. 1.5M
O) L+Al/C44 included f:: Tinyl chloride, +
7) is the role of Note Hfl in Su8804 # @ Miyako
, the tip is melted and S u 8304
The case lid (8) is insulated by the glass 1 (9),
Hermetically sealed.

Is the 214th the invention? Expansion of lithium negative corps due to ζ m11
Peeling J)+1, the outer surface of lithium (10) was coated with polyether sal 7 on (11), and 5Φt1.
A: It was obtained by a simple procedure of immersing lithium in methylene chloride liquid and immediately pulling it to dry. In addition, 14 of polyether sulfone
1' P4 is dissolved in methylene chloride and any fri
It can be easily formed by immersing lithium in a 7-ounce solution of polyether salt of Q degree and then drying it.
Methylene chloride of this polyether sulfone fig 81
Since it has poor hygroscopic elliptical properties, it can be adjusted in normal atmosphere, and its failure handling is easy.

Next, based on this 4IIIi example, (8(JCl 2 /
Li tun i also four to completely processed 1. Lithium that is not...
The battery prepared using the same method was stored at 60°C for 10 days and discharged at 1 time tl (Qm load, /1 random 11j25"c). The figure shows 7 points.

As is clear from this, it can be seen that the battery according to the present invention exhibits favorable \L 7-gagari characteristics without any delay at the beginning of discharge.

Soil r: The relationship between the film thickness and effectiveness of polyether sulfon is 1.
To obtain 411 m of lF+, j and fl, polyether sal 7on was diluted with methylene chloride common solution m of 5% to 40%, and lithium was immersed and dried to form various film thicknesses on the surface. Form a polyether sulfon layer 1. Create a straight curve of the structure based on this example, and perform the same test I4 as described above.
□\rko.

The conjunctiva is shown in Figure 4. All lli:i 171i +
This (2) -C'+l+: 1.1: Delay suppression is recognized, so 5% to 15% haze 1 is preferable for samurai.
(Introduction)

From this, poly-[-Hill → J Runo 4) fI! 77h of J overturn and °II], and between the IE late oxidation suppression effect (Il
It is likely that there is a relationship between I don't know what the first call is.

However, polyether version 4], [■
It is obvious that the If8 spread suppression effect is related to the coating thickness.

As is clear from the foregoing, the present invention readily provides a 1) O (monthly 2, / 1.+1 battery) without rlT:lE delay, and which is capable of providing a battery with no rlT:lE delay, and which can be used directly and easily. , 4, l:, /l and then tn f (Explanation No. 11)
．． 12 C12 using lithium according to the present invention
/L・1' Battery vertical/new side 1'N4. ．． .

: IX2 jshuo is polynysole that is related to the present invention →)
Ruff 24 #1. Enlarged partial cross-sectional view of lithium smelling.

Figure 3 shows a conventional battery (B) and a conventional battery (B) based on Pekomei.
(+,)4...Lithium negative filJ, 10
······lithium.

11...Polyether sulfono.

1B

Claims (1)

[Claims] A 1-thionyl chloride lithium chloride cell which is characterized in that its surface is coated with polyether sulfonate and 1-thionyl chloride lithium is used as a negative active material.