CN102938464A

CN102938464A - Low-gassing-amount alkaline zinc-manganese battery cathode additive and preparation method thereof

Info

Publication number: CN102938464A
Application number: CN2012104776718A
Authority: CN
Inventors: 郑昔宝; 吴金星; 马畅
Original assignee: ZHEJIANG TEYUAN BATTERY CO Ltd
Current assignee: ZHEJIANG TEYUAN BATTERY CO Ltd
Priority date: 2012-11-22
Filing date: 2012-11-22
Publication date: 2013-02-20
Anticipated expiration: 2032-11-22
Also published as: CN102938464B

Abstract

The invention provides a low-gassing-amount alkaline zinc-manganese battery cathode additive and a preparation method thereof, wherein the alkaline zinc-manganese battery cathode additive is prepared from the following raw materials in percentage by weight: 56-74% of zinc powder, 15-30% of deionized water, 5-20% of potassium hydroxide, 1-2% of zinc oxide, 0.1-1% of binder and 0.01-0.1% of silicate. The cathode corrosion inhibitor used in the invention can effectively reduce the gassing amount of the battery, obviously improve the storage performance of the battery, greatly reduce the production cost of the battery and be beneficial to improving the market competitiveness.

Description

Low-gassing-amount alkaline zinc-manganese battery cathode additive and preparation method thereof

Technical Field

The invention belongs to the field of fine chemical materials, and particularly relates to a low-gassing-amount alkaline zinc-manganese battery cathode additive and a preparation method thereof.

Background

In an alkaline zinc-manganese battery, the zinc cathode is easy to dissolve zinc in alkali liquor and generate hydrogen synchronously due to the thermodynamic instability of the zinc cathode, so that the air pressure in the battery is gradually increased, and the storage performance of the battery is reduced and the leakage of the battery is caused. The traditional solution is mainly to add mercury into zinc powder to form amalgam alloy, but the method is stopped at present because of the strong toxicity of mercury. At present, the most widely method is to add metals or metal oxides with high hydrogen evolution overpotentials such as indium and bismuth in the zinc powder smelting and zinc paste preparation processes. However, metals such as indium and bismuth are expensive, and this causes a large cost burden. The finding of a novel corrosion inhibitor which has low price and corrosion inhibition effect close to that of indium and bismuth has more practical significance.

Disclosure of Invention

In order to solve the technical problems, the invention provides a low-gas-evolution alkaline zinc-manganese battery cathode additive and a preparation method thereof.

The negative electrode additive with low gas evolution quantity for the alkaline zinc-manganese battery is characterized by being prepared from the following raw materials in percentage by weight: 56-74% of zinc powder, 15-30% of deionized water, 5-20% of potassium hydroxide, 1-2% of zinc oxide, 0.1-1% of binder and 0.01-0.1% of silicate.

The alkaline zinc-manganese dioxide battery cathode additive with low gassing amount is characterized by being prepared from the following raw materials in percentage by weight: 62 to 70 percent of zinc powder, 18 to 24 percent of deionized water, 8 to 14 percent of potassium hydroxide, 1.2 to 1.5 percent of zinc oxide, 0.4 to 0.5 percent of binder and 0.03 to 0.05 percent of silicate.

The alkaline zinc-manganese dioxide battery cathode additive with low gassing amount is characterized by being prepared from the following raw materials in percentage by weight: 67% of zinc powder, 23.11% of deionized water, 8% of potassium hydroxide, 1.35% of zinc oxide, 0.5% of binder and 0.04% of silicate.

The preparation method of the alkaline zinc-manganese dioxide battery negative electrode additive with low gas evolution comprises the following steps:

1) Putting zinc powder, a binder and silicate into a mixer, and uniformly stirring to prepare dry powder;

2) Preparing potassium hydroxide, zinc oxide and deionized water into a solution;

3) Putting the dry powder and the aqueous solution into a calamine cream machine, uniformly stirring, vacuumizing, removing bubbles, and barreling for later use.

The invention relates to a low gas evolution alkaline zinc-manganese battery cathode additive and a preparation method thereof. The cathode corrosion inhibitor used in the invention can effectively reduce the gassing amount of the battery, obviously improve the storage performance of the battery, greatly reduce the production cost of the battery and be beneficial to improving the market competitiveness.

Detailed Description

Example 1

Weighing 62kg of zinc powder, 24kg of deionized water, 12kg of potassium hydroxide, 1.5kg of zinc oxide, 0.45kg of binder and 0.05kg of silicate, putting the zinc powder, the binder and the silicate into a mixer, uniformly stirring to prepare dry powder, preparing a solution from the potassium hydroxide, the zinc oxide and the deionized water, then putting the dry powder and the aqueous solution into a calamine cream machine, uniformly stirring, vacuumizing, removing bubbles, and barreling for later use.

The discharge performance test of the negative electrode of the alkaline zinc-manganese battery with low gas evolution amount prepared in the embodiment 1 and the negative electrode of the alkaline zinc-manganese battery obtained by the existing formula process is shown in table 1.

Table 1 example 1 comparison of discharge performance experiment with conventional formulation process

	Continuous discharge of 10 omega to 0.9V	Continuous discharge of 3.9 omega to 0.9V	1.8 omega pulse to 0.9V	1000mA pulse to 0.9V	Continuous discharge of 3.9 omega to 0.8V
						Example 1	19.35 hours	388.8 minutes	672 times	416 times (times)	428.5 minutes
The existing formula process	19.04 hours	368.1 min	611.3 times	353 times (k)	393.5 minutes

Through calculation, the production cost of the battery can be reduced by 23% by adopting the formula and the process in the embodiment 1.

Example 2

Weighing 67kg of zinc powder, 23.11kg of deionized water, 8kg of potassium hydroxide, 1.35kg of zinc oxide, 0.5kg of binder and 0.04kg of silicate, putting the zinc powder, the binder and the silicate into a mixer, uniformly stirring to prepare dry powder, preparing a solution from the potassium hydroxide, the zinc oxide and the deionized water, then putting the dry powder and the aqueous solution into a calamine cream machine, uniformly stirring, vacuumizing, removing bubbles, and barreling for later use.

The discharge performance test of the low gas evolution alkaline zinc-manganese dioxide battery cathode prepared in the embodiment 2 and the alkaline zinc-manganese dioxide battery cathode prepared by the existing formula process is shown in table 2.

Table 2 example 2 comparison of discharge performance experiment with common formulation process

	Continuous discharge of 10 omega to 0.9V	Continuous discharge of 3.9 omega to 0.9V	1.8 omega pulse to 0.9V	1000mA pulse to 0.9V	Continuous discharge of 3.9 omega to 0.8V
						Example 2	19.63 hours	403.5 minutes	698 times	448 times	469.8 minutes
The existing formula process	19.04 hours	368.1 min	611.3 times	353 times	393.5 minutes

Through calculation, the production cost of the battery can be reduced by 31% by adopting the formula and the process in the embodiment 2.

Example 3

Weighing 70kg of zinc powder, 18.37kg of deionized water, 10kg of potassium hydroxide, 1.2kg of zinc oxide, 0.4kg of binder and 0.03kg of silicate, putting the zinc powder, the binder and the silicate into a mixer, uniformly stirring to prepare dry powder, preparing the solution of the potassium hydroxide, the zinc oxide and the deionized water, then putting the dry powder and the aqueous solution into a calamine cream machine, uniformly stirring, vacuumizing, removing bubbles, and barreling for later use.

The discharge performance test of the negative electrode of the alkaline zinc-manganese battery with low gas evolution amount prepared in the embodiment 3 and the negative electrode of the alkaline zinc-manganese battery obtained by the existing formula process is shown in table 3.

Table 3 example 3 comparison with the discharge performance test of the conventional formulation process

	Continuous discharge of 10 omega to 0.9V	Continuous discharge of 3.9 omega to 0.9V	1.8 omega pulse to 0.9V	1000mA pulse to 0.9V	Continuous discharge of 3.9 omega to 0.8V
						Example 3	19.45 hours	385.4 minutes	653.9 times	423 times (A)	428.7 minutes
The existing formula process	19.04 hours	368.1 min	611.3 times	353 times	393.5 minutes

Through calculation, the production cost of the battery can be reduced by 25% by adopting the formula and the process in the embodiment 3.

It can be seen from tables 1, 2 and 3 that the new formulation process of the present invention can greatly improve the discharge performance of large current and the storage performance of the battery, the discharge time and the discharge frequency of each item are obviously increased compared with the original process, and the production cost of the battery can be greatly reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are included in the scope of the present invention.

Claims

1. The negative electrode additive of the alkaline zinc-manganese battery with low gassing amount is characterized by being prepared from the following raw materials in percentage by weight: 56-74% of zinc powder, 15-30% of deionized water, 5-20% of potassium hydroxide, 1-2% of zinc oxide, 0.1-1% of binder and 0.01-0.1% of silicate.

2. The negative electrode additive for the alkaline zinc-manganese dioxide battery with low gassing amount according to claim 1 is characterized by being prepared from the following raw materials in percentage by weight: 62 to 70 percent of zinc powder, 18 to 24 percent of deionized water, 8 to 14 percent of potassium hydroxide, 1.2 to 1.5 percent of zinc oxide, 0.4 to 0.5 percent of binder and 0.03 to 0.05 percent of silicate.

3. The negative electrode additive for the alkaline zinc-manganese dioxide battery with low gas evolution quantity as claimed in claim 1, is characterized in that the negative electrode additive is prepared from the following raw materials in percentage by weight: 67% of zinc powder, 23.11% of deionized water, 8% of potassium hydroxide, 1.35% of zinc oxide, 0.5% of binder and 0.04% of silicate.

4. The preparation method of the negative electrode additive of the alkaline zinc-manganese dioxide battery with low gas evolution quantity as claimed in any one of claims 1 to 3, comprises the following steps: