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Novel alloy electrode and sodium-ion battery thereof

A sodium ion battery and alloy electrode technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of negative electrode collapse damage, limited batch use, unsatisfactory battery life, etc.

Active Publication Date: 2018-11-13
东莞格林德能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, whether it is a lithium-ion battery or a sodium-ion battery, there is a common problem when using pure metals or alloys as the negative electrode, that is, the volume of the negative electrode expands rapidly during charging. Ideal, thus limiting the bulk use of such materials as anode materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Fill the reaction chamber with argon, add 5 kg of antimony and 5 kg of sodium into the furnace, heat to 650 ° C for 2 hours, pour the molten slurry into the mold, cool to room temperature, remove the alloy blank, cut and punch it into an electrode shape, put it into 50 kg of absolute ethanol, soak it for 4 hours, take it out of the reaction chamber and dry it to get the porous antimony alloy electrode. Then use sodium-based Prussian blue as the positive electrode material for sodium-ion batteries, and make positive sheets through slurry mixing, coating, rolling, and slitting, and then use porous antimony alloy electrodes as negative electrodes through lamination, welding, packaging, and baking. A batch of 10Ah sodium-ion power batteries were prepared through processes such as liquid injection, formation, and volume separation.

Embodiment 2

[0014] Fill the reaction chamber with argon, add 7kg of antimony and 3kg of sodium into the furnace, heat to 650°C for 2 hours, pour the molten slurry into the mold, cool to room temperature, remove the alloy blank, cut and punch it into an electrode shape, put it into 50 kg of absolute ethanol, soak it for 4 hours, take it out of the reaction chamber and dry it to get the porous antimony alloy electrode. Then use sodium-based Prussian blue as the positive electrode material for sodium-ion batteries, and make positive sheets through slurry mixing, coating, rolling, and slitting, and then use porous antimony alloy electrodes as negative electrodes through lamination, welding, packaging, and baking. A batch of 10Ah sodium-ion power batteries were prepared through processes such as liquid injection, formation, and volume separation.

Embodiment 3

[0016] Fill the reaction chamber with argon, add 6 kg of antimony and 4 kg of sodium into the furnace, heat to 650 ° C for 2 hours, pour the molten slurry into the mold, cool to room temperature, remove the alloy blank, cut and punch it into an electrode shape, put it into 50 kg of absolute ethanol, soak it for 4 hours, take it out of the reaction chamber and dry it to get the porous antimony alloy electrode. Then use sodium-based Prussian blue as the positive electrode material for sodium-ion batteries, and make positive sheets through slurry mixing, coating, rolling, and slitting, and then use porous antimony alloy electrodes as negative electrodes through lamination, welding, packaging, and baking. A batch of 10Ah sodium-ion power batteries were prepared through processes such as liquid injection, formation, and volume separation.

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Abstract

The invention discloses a novel alloy electrode and a sodium-ion battery thereof. The novel alloy electrode and the sodium-ion battery thereof are characterized in that a large number of holes are formed on antimony alloy, and when the antimony alloy serves as a sodium-ion electrode, sodium ions can enter into the electrode via the holes during charging and escape out of the holes and back to a positive electrode via electrolytes during discharging, so that functions of sodium ion storage and battery charging and discharging are achieved. Sodium Prussian blue serves as the positive electrode materials, and the porous antimony alloy serves as the negative electrode materials and is processed through slurry mixing, coating, rolling and slitting to obtain porous antimony alloy negative plates, and then through laminating, welding, packaging, baking, injection, formation and capacity grading, the sodium-ion battery is obtained. According to the novel alloy electrode and the sodium-ion battery thereof, sodium metal and the metal electrode are fused, then sodium is removed to form a large number of holes inside the electrode, due to the fact that the holes are originally used for storingsodium, sodium ions can effectively enter into the holes during charging, the problem of electrode expansion can be avoided, and the manufactured sodium-ion battery is excellent in electrical performance and safety performance.

Description

technical field [0001] The invention belongs to the field of new energy batteries, and in particular relates to a novel porous antimony alloy electrode and a sodium ion battery thereof. Background technique [0002] Since the 1980s, sodium-ion batteries have been researched and developed together with lithium-ion batteries, but because their performance is far from that of lithium-ion batteries, they have not been popularized and applied in batches. However, lithium is a rare metal. After years of development, lithium resources are becoming increasingly depleted. Compared with lithium, the content of sodium on the earth is much richer. So now sodium-ion batteries have returned to the foreground and are increasingly valued. [0003] Since the radius of sodium ions is much larger than that of lithium ions, electrodes such as graphite commonly used in lithium-ion batteries cannot be used in sodium-ion batteries. Everyone has tried to use amorphous carbon as the negative electr...

Claims

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Application Information

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IPC IPC(8): H01M4/134H01M4/1395H01M4/38H01M10/054
CPCH01M4/134H01M4/1395H01M4/38H01M10/054Y02E60/10
Inventor 李义李国敏刘小虹
Owner 东莞格林德能源有限公司
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