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Sodium Secondary Battery

A sodium secondary battery and sodium ion conduction technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of low competitiveness and low power, and achieve the goals of improving battery life, preventing deterioration, and improving battery power efficiency Effect

Inactive Publication Date: 2015-06-03
SK INNOVATION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, existing sodium-based secondary batteries such as sodium-sulfur batteries or sodium-nickel chloride batteries have a disadvantage that, in the case of sodium-nickel chloride batteries, , need to work at least above 250°C, and in the case of sodium-sulfur batteries, have an operating temperature of at least 300°C
Due to this problem, in order to maintain temperature, maintain airtightness, and enhance safety, there are many disadvantages in terms of manufacturing or operating economy.
In order to solve the above-mentioned problems, a room temperature (room temperature) type sodium-based battery has been developed, but due to its very low power, it is not competitive with nickel-hydrogen batteries or lithium batteries

Method used

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Examples

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Effect test

Embodiment 1

[0059] Mix the first salt NaAlCl according to the predetermined ratio 4 with the second salt NaAlI 4 , and confirm the melting point. Confirmed by NaAlCl 4 : NaAlI 4 The melting point of the electrolyte manufactured by mixing the 9.5:0.5 molar ratio is 150 ° C, and the melting point is higher than that of NaAlCl 4 Single salt (comparative example 1) or NaAlI 4 The single salt (comparative example 2) is low, and its ion conductivity is suitable for battery implementation.

Embodiment 2

[0061] Mix the first salt NaAlCl according to the predetermined ratio 4 with the second salt NaAlI 4 , and confirm the melting point. Confirmed by NaAlCl 4 : NaAlI 4 The melting point of the electrolyte manufactured by mixing in a 9:1 molar ratio is 130°C, which is higher than that of NaAlCl 4 Single salt (comparative example 1) or NaAlI 4 The single salt (comparative example 2) is low, and its ion conductivity is suitable for battery implementation.

Embodiment 3

[0063] Mix the first salt NaAlCl according to the predetermined ratio 4 with the second salt NaAlI 4 , and confirm the melting point. Confirmed by NaAlCl 4 : NaAlI 4 The melting point of the electrolyte manufactured by mixing in a 7:3 molar ratio is 100°C, which is higher than that of NaAlCl 4 Single salt (comparative example 1) or NaAlI 4 The single salt (comparative example 2) is low, and its ion conductivity is suitable for battery implementation.

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Abstract

Provided is a sodium secondary battery capable of operating at a low temperature. More particularly, the sodium secondary battery according to the present invention includes: an anode containing sodium; a cathode containing a transition metal and an alkali metal halide; and a sodium ion conductive solid electrolyte provided between the anode and the cathode, wherein the cathode is impregnated in a molten salt electrolyte containing a sodium.metal halogen salt including at least two kinds of halogens.

Description

technical field [0001] The present invention relates to a sodium secondary battery, and more specifically, to a sodium secondary battery including a molten salt electrolyte with a lowered melting point. Background technique [0002] With the rapid increase in the use of new renewable energy, the need for energy storage devices using batteries is rapidly increasing. Among such batteries, lead batteries, nickel / hydrogen batteries, vanadium batteries, and lithium batteries can be utilized. However, since lead batteries and nickel / hydrogen batteries have very low energy densities, there is a problem that a lot of space is required to store the same amount of energy. In addition, in vanadium batteries, since the solution containing heavy metals is used, it becomes an environmental pollution factor, and the substances between the negative electrode and the positive electrode move in a small amount through the separator separating the negative electrode and the positive electrode,...

Claims

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Application Information

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IPC IPC(8): H01M10/39
CPCH01M4/381H01M10/399H01M2300/0054Y02E60/10H01M10/0562H01M10/054
Inventor 蔡济玄高源祥李承玉朴戴仁金正洙赛义·巴瓦拉尤马修·理查德·鲁宾逊亚历克西斯·L·埃克尔斯通阿肖克·V·乔希
Owner SK INNOVATION CO LTD
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