JPS6031068B2 - non-aqueous electrolyte battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvement of a non-aqueous electrolyte battery using manganese dioxide as an active material, and aims to improve discharge performance.

In non-aqueous electrolyte batteries, the cathode active material is lithium, titrium, potassium, magnesium, etc., and the electrolyte is an organic liquid in which chloride, perchlorate, borofluoride, etc. are dissolved in various organic solvents. Manganese dioxide is used as a material because it dissolves little during storage and has a high monopolar potential, but sufficient discharge performance cannot be obtained because the discharge utilization rate of the active material is low. The present invention improves the discharge utilization rate of manganese dioxide by chemically adsorbing at least one metal ion selected from the group of lithium, sodium, and potassium to manganese dioxide.Examples will be described below. .

After soaking electrolytic manganese dioxide (y-Md02) with an average particle size of about 10 to 30 μm in a saturated aqueous solution of lithium hydroxide, sodium hydroxide, potassium hydroxide, etc. for about 20 hours, Dry at 0.

Parts by weight of manganese dioxide 9, which had been immersed in this saturated aqueous solution and dried at high temperature, 15 parts by weight of a haze guide agent made of phosphorous graphite, and parts by weight of a binder 1 made of a suspension of polyfluoroethylene were uniformly added. The anode 1 is prepared by mixing and press-molding the anode 1, inserting it into the bottom of the anode can 2 as shown in the drawing, and placing the separator 3 and absorbent paper 4 on top of it one after another. After bonding the gasket 5 with an L-shaped cross section, 1.5% of lithium perchlorate was added to a solvent of acetonitrile mixed with about 2% by weight of propylene carbonate. ■M/The absorbent paper 4 is impregnated with the dissolved electrolyte. Separately, a cathode agent 6 made of a mixture of about 1% by weight amalgamated aluminum powder 8 and an electrolytic solution 2 is filled in the cathode terminal plate 7, and this is inserted into the gasket 5 with iron. Bend the green opening of the anode can 2 inward to make a button-shaped battery.

In addition to the examples, methods for chemically adsorbing metal ions such as lithium, sodium, and ion on manganese dioxide include adding manganese dioxide to a solution of halides, perchlorates, borofluorides, etc. of the metal components. There is a method of soaking and drying at high temperature. The intestinal pole when the battery obtained in Example and the same type battery using manganese dioxide which does not chemically adsorb metal ions were connected to a load resistance of 5000 and continuously discharged at 2 pi○. The discharge utilization rate of the active material is shown in the following table. From this table, it can be seen that the battery of the present invention improves the discharge utilization rate of the active material due to the action of the adsorbed metal component, and has excellent discharge performance.

Although the theoretical basis for the effect of additive components is not necessarily clear, it is believed that by immersing manganese dioxide in a solution and drying it at high temperature, metal ions are chemically adsorbed on the surface of manganese dioxide, which causes a discharge reaction. It is thought that it is working effectively. Manganese dioxide used as a positive electrode active material has various crystal structures, and among them, active y-type manganese dioxide is preferable because it has a large effect by chemically adsorbing metal ions.

[Brief explanation of drawings]

The drawing is a cross-sectional view of the battery of the present invention. 1... Anode.

Claims (1)

[Claims] 1. A non-aqueous electrolytic battery using manganese dioxide, which has chemically adsorbed at least one metal ion selected from the group of lithium, sodium, and potassium, as an anode active material.