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A positive electrode for high specific energy and rapid activation of seawater battery and its preparation method

A seawater battery and cathode technology, which is applied in the field of high specific energy and rapid activation of seawater batteries, can solve the problems of low specific energy, low activation performance at discharge rate, and difficulty in meeting market demands, and achieves shortened activation time, improved specific energy, and improved activation. fast time effect

Active Publication Date: 2022-02-01
武汉中原长江科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Magnesium-lead chloride is one of the most widely used systems for seawater batteries. At present, the specific energy, discharge rate, and activation performance of magnesium-lead chloride seawater batteries are relatively low, and it is difficult to meet market demand.

Method used

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  • A positive electrode for high specific energy and rapid activation of seawater battery and its preparation method
  • A positive electrode for high specific energy and rapid activation of seawater battery and its preparation method
  • A positive electrode for high specific energy and rapid activation of seawater battery and its preparation method

Examples

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Effect test

Embodiment 1

[0034] Example 1: Put lead chloride in a ball mill tank, control the ball-to-material ratio between 0.6:1 and 2:1, ball mill for 2 hours, and sieve. Take 30.67g of ground lead chloride, add carbon nanotubes and silver-plated copper powder in a ratio of 1:4, ball mill evenly, then add the binder polytetrafluoroethylene, and stir evenly. Put the mixed positive electrode powder into the mold, adjust the parameters of the press, press and form the positive electrode powder cake, wrap the positive electrode powder cake with copper mesh, put it into the customized mold, adjust the press parameters, and press and form the positive electrode sheet. The positive electrode sheet was baked at 70°C for 21 hours to obtain the positive electrode sheet described in this patent with good specific energy and activation performance. The pole piece and the magnesium plate form a seawater battery, and the positive and negative leads are welded for battery testing. The formula battery is discharg...

Embodiment 2

[0035] Example 2: Put lead chloride in a ball mill tank, control the ball-to-material ratio between 0.6:1 and 2:1, ball mill for 2 hours, and sieve. Take 30.67g of ground lead chloride, add carbon nanotubes and silver-plated copper powder in a ratio of 1:3, ball mill evenly, then add the binder polytetrafluoroethylene, and stir evenly. Put the mixed positive electrode powder into the mold, adjust the parameters of the press, press and form the positive electrode powder cake, wrap the positive electrode powder cake with copper mesh, put it into the customized mold, adjust the press parameters, and press and form the positive electrode sheet. The positive electrode sheet was baked at 70°C for 21 hours to obtain the positive electrode sheet described in this patent with good specific energy and activation performance. The pole piece and the magnesium plate form a seawater battery, and the positive and negative leads are welded for battery testing. The formula battery is discharg...

Embodiment 3

[0036] Example 3: Put lead chloride in a ball mill tank, control the ball-to-material ratio between 0.6:1 and 2:1, ball mill for 2 hours, and sieve. Take 33.47g of ground lead chloride, add 0.9g of carbon nanotubes, ball mill evenly, then add binder polytetrafluoroethylene, and stir evenly. Put the mixed positive electrode powder into the mold, adjust the parameters of the press, press and form the positive electrode powder cake, wrap the positive electrode powder cake with copper mesh, put it into the customized mold, adjust the press parameters, and press and form the positive electrode sheet. The positive electrode sheet was baked at 70°C for 21 hours to obtain the positive electrode sheet described in this patent with good specific energy and activation performance. The pole piece and the magnesium plate form a seawater battery, and the positive and negative leads are welded for battery testing. The formula battery is discharged at room temperature, the activation time is...

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Abstract

The invention discloses a positive electrode for high specific energy and rapid activation of a seawater battery and a preparation method thereof. The invention belongs to the application field of battery technology engineering. The positive electrode is composed of lead chloride, a binder, and a conductive agent. The preparation method includes The steps are as follows: 1) ball milling; 2) kneading powder; 3) tablet pressing; 4) surfing the net; 5) drying. According to different types of batteries, the positive electrode sheet is precisely pressed to a suitable process size. The invention has the beneficial effects that: the preparation method is simple and easy to operate, the discharge capacity of the seawater battery is effectively improved, the activation time of the seawater battery is greatly shortened, and the seawater battery can be quickly activated when working at high and low temperatures.

Description

technical field [0001] The invention relates to the field of engineering application of battery technology, in particular to a preparation method for high specific energy and rapid activation of seawater batteries. Background technique [0002] Seawater batteries were designed by Bell Laboratories of the United States and developed by General Electric during the Second World War. The most prominent feature of seawater batteries is that they do not need to carry electrolytes, and can use natural seawater to form electrolytes when needed. For different purposes, seawater batteries have many different types, such as power batteries for high-power underwater equipment, long-period, low-power underwater detection instrument batteries, and power batteries for underwater vehicles—semi-fuel seawater batteries, etc. . With my country's vigorous development of deep sea requirements, it is one of the future development directions to develop loadable and durable magnesium seawater batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/06H01M4/08H01M4/58H01M6/34
CPCH01M4/0435H01M4/0471H01M4/08H01M4/582H01M4/06H01M6/34
Inventor 刘芬史可欣童金林
Owner 武汉中原长江科技发展有限公司
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