JPS5826460A - Air cell - Google Patents

Abstract

PURPOSE:To simplify the work process while maintaining the air electrode characteristic by manufacturing an air electrode such that a metal chelate compound having a fine powder transition metal element is the center of the molecule and thermally processed in the inert atmosphere is mixed with active carbon and a water repellent substance. CONSTITUTION:A positive electrode also used as the positive terminal has an air supply hole 2. The air electrode 3 is a thin plate where 3pts.wt. fine powder in which the cobalt phthalocyanine is thermally processed in the nitrogen gas atmosphere at the temperature of 130-1,300 deg.C, 7pts.wt. fine powder active carbon having the surface area wider than 600m<2>/g and 4pts.wt. teflon fine powder 4 are mixed and contacted with the hydrophilic semi-transparent film 4. The electrolyte holding layer 5 for holding the caustic alkali electrolyte is a nonwoven fabric or porous member having excellent liquid holding performance and liquid resistance and contacts with the negative electrode member 6. An air permeable paper 7 will contact through a porous teflon sheet 8 with the air electrode 3 while the other face will contact with the positive electrode can 1. The negative electrode can 9 will seal the cell through a gasket 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of the air electrode of an air battery, and is intended to simplify the working process.

In conventional air batteries, a water-repellent binder such as Teflon powder is mixed with granular activated carbon, and an air polar sound is used in which a conductive material such as a gold-nickel net is formed into a thin plate and a force a is applied to the mixture.

However, in conventional air electrodes, solid matter of various shapes and sizes is easily formed during the mixing operation of granular activated carbon and binder, and it is extremely difficult to process a conductor such as nickel net into a homogeneous thin plate. The density of the air electrode plate became uneven. Therefore, during long-term storage, the catalytic activity decreases due to decomposition, resulting in deterioration of oxygen reduction ability (7), which has the disadvantage of deteriorating battery performance.

To improve this shortcoming, in order to improve and maintain the oxygen reduction ability of the air electrode, activation has been performed using a relatively inexpensive phthalocyanine catalyst, but in order to add this catalyst (
r-1, it was necessary to go through a complicated work process of adsorbing the phthalocyanine catalyst dissolved in the solution onto activated carbon, washing 1-1, drying, and heating.

The present invention is a mixture of finely powdered powder, cobalt, manganese, etc., which has been heat-treated in an inert atmosphere, a compound containing transition *kaede elements at all centers, activated carbon, and a clear water substance. The purpose is to simplify the work process while maintaining the characteristics of the air electrode by manufacturing the air electrode using the same method.

The air electrode used in the present invention is made of a transition metal such as nickel, cobalt, 7 manganese, etc., a chelate fIS having a structure in which the gold center is surrounded by four nitrogen atoms.
A heat-treated imitator, carbonaceous fine powder, and a water-repellent substance are thoroughly mixed, rolled into a thin plate (E7), and punched into a predetermined size for use.

According to this, the work process is very simple and can be greatly simplified, and since the chelate compound of fc transition metal changes into a highly conjugate bond by heat treatment, when used as an air electrode, it stabilizes the activity 1 of the air electrode. , Air battery d manufactured using this air electrode: It was found that it could sufficiently withstand storage during storage.

Embodiment 2 of the air battery of the present invention manufactured in this manner will be described based on the drawings. .

Reference numeral 1 denotes a positive electrode can that also serves as a positive electrode terminal, and has an air supply hole 2 at the bottom. 3 is an air electrode, and the surface area value measured by gas adsorption method etc. is 600 m' for 3 parts of fine powder made by heating cobalt tutalonanine at 130'O to 1300'0 in a nitrogen gas atmosphere. /, 9 or more fine powder activated carbon 7
It is a non-woven fabric with excellent liquid retention and liquid resistance, with an electrolyte holding layer that retains all its lyophilic properties. Or, if it is a porous material, it may be in contact with the negative electrode body 6.
．． It is self-contained and is in contact with the air electrode 3 through a Teflon notebook 8 having many micropores, and the other side is in contact with the bottom of the IF electrode can 1 which is provided with air supply holes 2 and is layered. Reference numeral 9 denotes a negative electrode can, and the opening of the positive electrode can 1 is bent through the entire gasket 10 to seal the battery.

Diameter 11.6mm, height 54mm manufactured in this way
The air battery of the present invention (A1) and the cobalt phthalocyanine activated carbon dissolved in a solution of the prior art were adsorbed, washed 17 times, separated by P, dried and then heat treated to form a nickel net. An air electrode was made by pressure molding, and the air electrode was then used to manufacture the conventional product CB), which is an air battery made with the same structure and dimensions as the invention product [A], and the manufacturing time for each air electrode was 250 after storing at room temperature for 30 days.
This is a survey of heavy metal discharge deterioration when hitting 1 tr for 3 consecutive days with Ω. The results were summarized as the product of the present invention [, A1 (i7100
Table 1 shows the values of the conventional product [l] in the case of 1-.

Table 1 According to this table, it is found that the product [A] of the present invention significantly shortens the manufacturing time of the air electrode compared to the conventional product [B]. This shows that it has been simplified. The discharge deterioration rate is roughly the same, and it can be seen that there is no adverse effect due to the simplification of the process.

In this way, cobalt-phthalocyanine was used in the explanation, but in addition to cobalt-phthalocyanine, transition elements such as nickel and manganese are also effective as the central core metal elements of the 7-thalocyanine series, and these metal elements can also be used. The porphyrin ring of has a similar effect.

In addition, these metal chelate compounds are heat-treated and the firing atmosphere is not only a nitrogen gas atmosphere but also an argon atmosphere or a vacuum, and the particle size of the metal chelate compound used in the air electrode of the present invention is 30 μm or less. is desired (7).

The reason for this is that the larger the powder particle size is, the lower the oxygen reduction activity is, and it is desirable that the carbonaceous fine powder such as activated carbon has a particle size of 100 μm or less.

As described above, a fine powder of a chelate compound having a structure in which these elements of transition metals such as nickel, cobalt, and manganese are at the center and surrounded by four nitrogen atoms, which has been heat-treated in an inert atmosphere, and a fine carbonaceous powder. The air battery of the present invention using an air electrode having a water-repellent material and a water-repellent material is of high industrial value as it can greatly simplify the manufacturing process of the 'αα bag and solve the problem of workload.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the air battery of the present invention. ■ ・Positive electrode can 2 ・Air supply hole 3 Air sieve 4 Semipermeable membrane 5 Liquid-impregnated paper 6 Negative electrode body

Claims (1)

[Claims] (1) A fine powder consisting of a chelate compound having a structure in which a transition metal element such as nickel, cobalt, or manganese is at the center and surrounded by four nitrogen atoms, which has been heat-treated in an inert atmosphere;
Using an air electrode containing fine carbonaceous powder and a water-repellent substance (
(2) The air battery according to item 1, characterized in that the metal chelate compound contains phthalocyanine and porphyrin.