阅读说明：本技术 一种改良型碱锰电池的制备方法及碱锰电池 (Preparation method of improved alkaline manganese battery and alkaline manganese battery ) 是由 张起豪 卢旭杰 于 2021-06-23 设计创作，主要内容包括：本发明公开了一种改良型碱锰电池的制备方法及碱锰电池。包括：第一步,称取800-1200份二氧化锰、70-80份膨胀石墨、0.5-1.5份碳纳米管纤维放于混合容器内；第二步,称取4-6份粘合脱模剂放于混合容器内；第三步,盖上混合容器封盖,采用三维运动混合的方式将物料进行混合,混合时间为2.8-3.2h,得到混合粉料；第四步,将混合粉料放入搅拌机中,开启搅拌机,将45份浓度为36％的氢氧化钾电解液采用喷壶喷入粉料中进行湿拌粉,拌粉时间为10min；第五步,制成正极材料,在碱锰电池生产线上使用该正极材料制备成成品电池。本发明可以有效地改善碱锰电池快速放电能力,减少正极石墨的使用量,提高电池大电流放电次数。(The invention discloses a preparation method of an improved alkaline manganese battery and the alkaline manganese battery. The method comprises the following steps: firstly, weighing 800-1200 parts of manganese dioxide, 70-80 parts of expanded graphite and 0.5-1.5 parts of carbon nanotube fiber in a mixing container; secondly, weighing 4-6 parts of adhesive release agent and placing the adhesive release agent in a mixing container; thirdly, covering a mixing container and sealing a cover, and mixing the materials in a three-dimensional motion mixing mode for 2.8-3.2 hours to obtain mixed powder; fourthly, putting the mixed powder into a stirrer, starting the stirrer, spraying 45 parts of 36% potassium hydroxide electrolyte into the powder by adopting a spray can for wet powder mixing, wherein the powder mixing time is 10 min; and fifthly, preparing the anode material, and preparing the finished battery by using the anode material on the production line of the alkaline manganese battery. The invention can effectively improve the quick discharge capability of the alkaline manganese battery, reduce the usage amount of the graphite of the anode and improve the heavy current discharge frequency of the battery.)

1. The preparation method of the improved alkaline manganese battery is characterized by comprising the following steps:

firstly, weighing 800-1200 parts of manganese dioxide, 70-80 parts of graphite and 0.5-1.5 parts of carbon nanotube fiber in a mixing container;

secondly, weighing 4-6 parts of adhesive release agent and placing the adhesive release agent in a mixing container;

thirdly, covering a mixing container and sealing a cover, and mixing the materials in a three-dimensional motion mixing mode for 2.8-3.2 hours to obtain mixed powder;

fourthly, putting the mixed powder into a stirrer, starting the stirrer, spraying 40-55 parts of potassium hydroxide electrolyte into the powder by adopting a spray can for wet powder mixing, wherein the powder mixing time is 10 min;

and fifthly, tabletting, granulating, screening and looping the powder subjected to wet powder mixing in the fourth step to prepare a positive electrode material, selecting cerous nitrate hexahydrate and 8-hydroxyquinoline 8-HQ as negative electrode additives, and preparing the finished battery by using the positive electrode material and the negative electrode additives on an alkaline manganese battery production line.

2. The method for preparing an improved alkali-manganese cell and the improved alkali-manganese cell as claimed in claim 1, wherein: the adhesive release agent is 4-6 parts of fatty acid soap.

3. The method for preparing an improved alkali-manganese cell and the improved alkali-manganese cell as claimed in claim 1, wherein: the three-dimensional motion mixing includes up-and-down shaking, left-and-right shaking, and front-and-back shaking.

4. The method for preparing an improved alkali-manganese cell and the improved alkali-manganese cell as claimed in claim 1, wherein: the mixing container is a plastic tank body.

5. An alkaline manganese cell, characterized in that it is prepared by the method of any one of claims 1-5.

Technical Field

The invention relates to the technical field of alkaline manganese batteries, in particular to a preparation method of an improved alkaline manganese battery and the alkaline manganese battery.

Background

The alkaline manganese battery is developed on the basis of an alkaline zinc-manganese battery, and is also called as a mercury-free alkaline manganese battery because of the application of mercury-free zinc powder and a novel additive. The battery can be charged and used for dozens of times to hundreds of times without changing the discharge characteristic of the original alkaline battery, and is economical and practical. The micro powder graphite for the alkaline manganese battery is mostly processed by the scale graphite, and the content of elements such as Fe, Cu and the like in the scale graphite is higher. If no effective control measures and detection means exist, the graphite can be used for producing mercury-free batteries, and serious quality accidents can be caused.

Disclosure of Invention

The invention aims to provide an improved alkaline manganese battery and a preparation method thereof, which can effectively improve the quick discharge capacity of the alkaline manganese battery, reduce the usage amount of positive electrode graphite and improve the large-current discharge frequency of the battery.

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of an improved alkaline manganese battery comprises the following steps:

firstly, weighing 800-1200 parts of manganese dioxide, 70-80 parts of graphite and 0.5-1.5 parts of carbon nanotube fiber in a mixing container;

secondly, weighing 4-6 parts of adhesive release agent and placing the adhesive release agent in a mixing container;

thirdly, covering a mixing container and sealing a cover, and mixing the materials in a three-dimensional motion mixing mode for 2.8-3.2 hours to obtain mixed powder;

fourthly, putting the mixed powder into a stirrer, starting the stirrer, spraying 45 parts of 36% potassium hydroxide electrolyte into the powder by adopting a spray can for wet powder mixing, wherein the powder mixing time is 10 min;

and fifthly, tabletting, granulating, screening and looping the powder subjected to wet powder mixing in the fourth step to prepare a positive electrode material, selecting cerous nitrate hexahydrate and 8-hydroxyquinoline 8-HQ as negative electrode additives, and preparing the finished battery by using the positive electrode material and the negative electrode additives on an alkaline manganese battery production line.

Preferably, the adhesive release agent is 4 to 6 parts of fatty acid soap.

Preferably, the three-dimensional motion mixture includes up-and-down shaking, left-and-right shaking, and front-and-back shaking.

Preferably, the mixing container is a plastic tank.

An alkaline manganese battery is prepared by the preparation method of the improved alkaline manganese battery.

Compared with the prior art, the invention has the following beneficial effects:

on the basis of adopting manganese dioxide material as the anode material of the alkaline manganese battery, a small amount of carbon nano tubes are doped, and carbon nano tube fibers are excellent conductors. In the aspect of the conductive property, an electronic transition channel between the tubes is widened by a doping means, and the specific conductivity of the fiber can exceed that of a metal conductor, so that the conductive property of the battery can be improved. The invention can effectively improve the quick discharge capability of the alkaline manganese battery, reduce the usage amount of the graphite of the anode and improve the heavy current discharge frequency of the battery.

Drawings

FIG. 1 is a graph comparing discharge time of No. 1 finished battery, No. 2 finished battery, No. 3 finished battery and commercial battery in constant resistance continuous discharge mode of 3.9 Ω and 24 h/d;

fig. 2 is a comparison graph of discharging times of No. 1 finished battery, No. 2 finished battery, No. 3 finished battery and commercial battery in a discharging mode of 1.5W constant power.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a preparation method of an improved alkaline manganese battery comprises the following steps:

firstly, weighing 1000 parts of manganese dioxide, 75 parts of graphite and 0.5 part of carbon nanotube fiber in a mixing container;

secondly, weighing 4-6 parts of fatty acid soap and putting the fatty acid soap into a mixing container;

thirdly, covering a mixing container to seal a cover, and mixing the materials in a mode of up-and-down shaking, left-and-right shaking and front-and-back shaking for 3 hours to obtain No. 1 powder;

fourthly, putting the No. 1 powder into a stirrer, starting the stirrer, spraying 45 parts of potassium hydroxide electrolyte with concentration into the powder by a spray can for wet powder mixing for 10 min;

and fifthly, tabletting, granulating, screening and looping the powder subjected to wet powder mixing in the fourth step to prepare a positive electrode material, selecting cerous nitrate hexahydrate and 8-hydroxyquinoline 8-HQ as negative electrode additives, and preparing the finished battery by using the positive electrode material and the negative electrode additives on an alkaline manganese battery production line.

In particular, the mixing vessel is a plastic tank.

An alkaline manganese battery is prepared by the preparation method of the improved alkaline manganese battery.

The mass parts of the carbon nano tube fibers are respectively changed into 1 part and 1.5 parts, and a No. 2 finished battery and a No. 3 finished battery are respectively prepared by adopting the same method as that for preparing the No. 1 finished battery.

As shown in figure 1, the No. 1 finished battery, the No. 2 finished battery, the No. 3 finished battery and the commercial battery (comparison sample) are subjected to discharge time comparison in a constant resistance continuous discharge mode, each battery is subjected to at least 3 discharge experiments, the experiment environment is continuous discharge of 3.9 omega, the theoretical value of discharge current is between 205 and 384mA, the battery belongs to medium current discharge, the battery is greatly influenced by polarization, the resistance of polarization internal resistance to discharge under the medium current is relatively large, the influence of internal resistance existing in the material on the performance is relatively large, and the data of 1 percent and 1.5 percent of the addition amount of the carbon nano tube are more excellent through data comparison.

As shown in fig. 2, the number 1 finished battery, the number 2 finished battery, the number 3 finished battery, and the commercially available battery (comparison sample) were compared in the constant power discharge mode for the number of discharges, each battery was subjected to at least 3 sets of discharge experiments, each set had at least 6 identical batteries, and each battery was tested by selecting a battery having a loop weight of 11-11.03 g. The internal resistance is changed violently by the instant high-power discharge, wherein the data of the addition amounts of the 1% carbon nano tube and the 1.5% carbon nano tube are most stable, the 3 groups are all over 156 times, the data fluctuation of the addition amount of 0.5% is large, the data are unstable under the condition of the addition amount of 0.5%, the content of the added carbon nano tube is small, and the effect of improving the performance cannot be achieved. It can also be seen from fig. 1 that the data of the added amounts of 1% and 1.5% of carbon nanotubes are relatively small, which proves that the internal resistance of the material after discharge is small, the internal consumption of the battery is relatively low, and the discharge times are more.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.