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A kind of anode material and preparation method thereof, battery

A technology for anode materials and batteries, applied in the field of anode materials and their preparation, can solve the problems of weakened discharge activity, serious self-corrosion, reduced active reaction area, etc., and achieves improved organizational uniformity, high anode utilization rate, and elimination of work hardening. Effect

Active Publication Date: 2020-12-08
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Magnesium anode materials have severe self-corrosion, resulting in low anode utilization, especially in the presence of Cl-rich - and ClO 4- Self-corrosion is more serious in environments with corrosive examples such as
In addition, during the discharge process of the magnesium anode, its surface is usually covered by magnesium hydroxide and magnesium oxide films, resulting in a decrease in the active reaction area, weakened discharge activity, and a positive shift in the open circuit potential, resulting in polarization.

Method used

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  • A kind of anode material and preparation method thereof, battery
  • A kind of anode material and preparation method thereof, battery

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preparation example Construction

[0029] For reference, the above-mentioned method for preparing the anode material may specifically include the following steps: sequentially performing the first annealing, multi-pass rolling and third annealing on the Mg-Al-Pb slab prepared from the above-mentioned chemical composition according to the ratio , wherein, before the third annealing, a second annealing is also performed after each rolling.

[0030] Wherein, the preparation method of cast slab may include:

[0031] Pure magnesium ingots (for example, 99.99% pure) are melted, followed by addition of alloying elements, followed by refining, standing and pouring.

[0032] In some embodiments, Al and Pb can be added in the form of, but not limited to, pure aluminum and pure lead, and La and Ce can be added in the form of, but not limited to, Mg-15%La and Mg-25%Ce. In some embodiments, the alloying elements are added sequentially in the order of pure aluminum, Mg-15%La, Mg-25%Ce and pure lead.

[0033] Further, stirr...

Embodiment 1

[0051] This embodiment provides a magnesium alloy anode material for a high-power seawater battery. It is Fe≤0.008wt%, Cu≤0.006wt%, Ni≤0.007wt%, and the rest is Mg.

[0052] The preparation process of the magnesium alloy anode material for the above-mentioned high-power seawater battery is as follows:

[0053] First, the pure magnesium ingot with a magnesium content of 99.99% is heated and melted, and the temperature is raised to 730°C under the protection of flux for melting, and pure aluminum, Mg-15% La master alloy, Mg-25% Ce master alloy and pure The lead is poured after being refined, stirred, slag removed and left to stand to obtain a cast billet of magnesium alloy anode material for seawater batteries.

[0054] The cast slab is annealed for the first time at 410°C, and the first annealing is held for 20 hours; after the first annealed slab is removed from the surface oxide layer, it is heated to 250°C, and warm rolling begins after 30 minutes of holding. The roll temp...

Embodiment 2

[0056] This embodiment provides a magnesium alloy anode material for a high-power seawater battery. It is Fe≤0.007wt%, Cu≤0.007wt%, Ni≤0.008wt%, and the rest is Mg.

[0057] The preparation process of the magnesium alloy anode material for the above-mentioned high-power seawater battery is as follows:

[0058] First, the pure magnesium ingot with a magnesium content of 99.99% is heated and melted, and the temperature is raised to 730°C under the protection of flux for melting, and pure aluminum, Mg-15% La master alloy, Mg-25% Ce master alloy and pure The lead is poured after being refined, stirred, slag removed and left to stand to obtain a cast billet of magnesium alloy anode material for seawater batteries.

[0059] The cast slab is annealed for the first time at 460°C, and the first annealing is held for 16 hours; after the first annealed slab is removed from the surface oxide layer, it is heated to 340°C, and warm rolling begins after 25 minutes of holding. The roll temp...

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Abstract

The invention provides an anode material, a preparation method thereof and a battery, and belongs to the technical field of batteries. The anode material is obtained by successively subjecting an Mg-Al-Pb casting body doped with La and Ce to first annealing, multi-pass rolling and third annealing, wherein the second annealing is performed after rolling each time. The chemical composition of the casting body includes: 0.01 to 8 wt% of Al, 0.01 to 7.5 wt% of Pb, 0.01 to 7 wt% of La, and 0.01 to 6 wt% of Ce, and not more than 0. 01 wt% of Fe, Cu and Ni, with the balance of Mg. The anode materialhas the characteristics of short activation time, negative discharge potential and a high anode utilization rate. The preparation method is simple, easy to operate, and can prepare an anode material with excellent performance. The battery including the anode material also has the characteristics of short activation time, negative discharge potential, and a high anode utilization rate.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an anode material, a preparation method thereof, and a battery. Background technique [0002] Seawater batteries generally refer to chemical power sources that use seawater as an electrolyte in a marine environment. The seawater battery adopts the principle of primary battery, the negative electrode is made of magnesium alloy or aluminum alloy, and the positive electrode material is CuCl, AgCl, PbCl 2 , AgO, H 2 o 2 etc., the electrolyte is seawater. Since the 1940s, governments and commercial organizations in the United States and some developed countries have begun to research and develop high-power seawater-activated power batteries, and the most successful application is torpedo power batteries. The high-power seawater batteries developed and put into use abroad include: Mg / AgCl, Mg / CuCl, Mg / PbCl 2 , Al / AgO and other systems. In addition to being used for torpedo powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/06H01M4/08H01M4/46H01M6/34
CPCH01M4/06H01M4/08H01M4/46H01M6/34
Inventor 赵虎王顺成杨莉周楠康跃华黄正华
Owner GUANGDONG INST OF NEW MATERIALS
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