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Low-temperature-resistant sodium ion battery

A sodium-ion battery, low-temperature resistant technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of lithium-ion battery performance degradation and limited use, improve conductivity, reduce internal resistance, and increase contact ratio. Effect

Inactive Publication Date: 2021-12-28
杨维年
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the working temperature of conventional lithium-ion batteries is -20°C to 60°C, and the performance of lithium-ion batteries will decrease when the temperature is lower than 0°C, which limits the use of lithium-ion batteries in cold regions. Therefore, the present invention provides a low-temperature-resistant sodium Ion battery, which can work normally in a special environment of -40°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A low temperature resistant sodium ion battery, the slurry of the positive electrode sheet coating of the sodium ion battery includes the following components by weight: 884 parts of positive electrode active material, 67 parts of SP conductive agent, 30 parts of CNT conductive agent, 35 parts of PVDF, Wherein, the positive electrode active material includes anhydrous ferrous sulfate, sodium sulfate and sodium fluoride with a molar ratio of 1:2:1; the slurry of the negative electrode coating of the sodium ion battery includes the following components by weight: hard carbon 920 parts, 25 parts of SP conductive agent, 30 parts of CMC, 28 parts of SBR.

Embodiment 2

[0039] A low temperature resistant sodium ion battery, the slurry of the positive electrode sheet coating of the sodium ion battery includes the following components by weight: 884 parts of positive electrode active material, 67 parts of SP conductive agent, 30 parts of CNT conductive agent, 35 parts of PVDF, Wherein, the positive electrode active material includes anhydrous ferrous sulfate, sodium sulfate and sodium fluoride with a molar ratio of 1:2:1; the slurry of the negative electrode coating of the sodium ion battery includes the following components by weight: hard carbon 920 parts, 25 parts of SP conductive agent, 30 parts of CMC, 28 parts of SBR; the electrolyte solution of sodium ion battery includes the following components: ethyl methyl carbonate, propylene carbonate, ethylene carbonate, sodium hexafluorophosphate, fluoroethylene carbonate, Propyl-1,3-sultone, 1,3-propane sultone, vinyl sulfate.

Embodiment 3

[0041] A low-temperature-resistant sodium-ion battery, the slurry of the positive electrode sheet coating of the sodium-ion battery includes the following components by weight: 834 parts of NaFe[Fe(CN)6], 72 parts of SP conductive agent, 30 parts of CNT conductive agent parts, 35 parts of PVDF; the slurry of the negative plate coating of the sodium ion battery includes the following components by weight: 920 parts of hard carbon, 25 parts of SP conductive agent, 30 parts of CMC, and 28 parts of SBR.

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Abstract

The invention relates to a high-capacity sodium-ion battery with high safety, and belongs to the field of sodium-ion batteries. A positive plate dressing of the sodium-ion battery comprises the following components in parts by weight: 884 parts of a positive active material, 67 parts of an SP conductive agent, 30 parts of a CNT conductive agent and 35 parts of PVDF; the positive active material comprises anhydrous ferrous sulfate, sodium sulfate and sodium fluoride in a molar ratio of 1: 2: 1; and a negative plate dressing of the sodium ion battery comprises the following components in parts by weight: 920 parts of a negative active material, 25 parts of an SP conductive agent, 30 parts of CMC and 28 parts of SBR. The sodium ion battery can be used in a low-temperature environment.

Description

technical field [0001] The invention relates to the field of sodium ion batteries, in particular to a low temperature resistant sodium ion battery. Background technique [0002] Sodium and lithium both belong to alkali metal elements. Sodium atoms and lithium atoms have very similar physical and chemical properties and similar detachment / intercalation mechanisms. The most important thing is that sodium resources are abundant on the earth. The sodium content reaches 2.64%, and the sodium element is widely distributed. There are abundant reserves in seawater, and the development is convenient. Therefore, the popularization and use of sodium ion batteries can alleviate the limited development of energy storage batteries caused by the shortage of lithium resources. In addition, the working temperature of conventional lithium-ion batteries is -20°C to 60°C, and the performance of lithium-ion batteries will decrease when the temperature is lower than 0°C, which limits the use of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/52H01M4/58H01M10/054H01M10/0567H01M10/0568H01M10/0569
CPCH01M4/364H01M4/5825H01M4/582H01M4/52H01M4/381H01M10/054H01M10/0568H01M10/0569H01M10/0567H01M2004/028Y02E60/10
Inventor 杨维年
Owner 杨维年
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