Sodium ion carrier-carbon composite powder, self-isolation electrode and preparation method

A technology of sodium ion carrier and carbon composite powder, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of manpower and material resources, time-consuming cost, etc., and achieve the advantages of environmental friendliness, good environmental adaptability, and wide application foreground effect

Pending Publication Date: 2022-06-03
杭州怡莱珂科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Different types of metal-ion batteries usually require different separator materials, and developing different types of separators for batteries with different working conditions requires a lot of manpower and material resources, which is time-consuming and expensive

Method used

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preparation example Construction

[0038] The fourth aspect of the present invention provides the preparation method of sodium ion carrier-carbon composite powder, and its steps are as follows:

[0039] 1) Dissolving 3-x molar parts of tetrabutyl titanate and x molar parts of aluminum trichloride in absolute ethanol or methanol to obtain a solution with a total concentration of 10% to 20%, the above-mentioned tetrabutyl titanate The molar ratio with aluminum trichloride conforms to the molecular formula Na 2+x Ti 3- x Al x O 7 In a given ratio, a surfactant equivalent to 0.1% to 0.5% by weight of the solution is added, and a mixed solution is obtained after stirring and melting.

[0040] The surfactant used in the present invention is a quaternary ammonium salt compound, preferably cetyltrimethylammonium bromide or cetyltrimethylammonium chloride. The role of the surfactant is to make the surface of the carbon black added later amphiphilic.

[0041] Tetrabutyl titanate and aluminum trichloride are titaniu...

Embodiment 1

[0074]1) Dissolve 850.8 grams of tetrabutyl titanate (2.5M) and 66.67 grams (0.5M) of aluminum trichloride in 3670 grams of absolute ethanol to obtain a solution with a total concentration of 20%, then add 22.93 grams of hexadecane Trimethylammonium bromide (0.5% by weight of the solution) was stirred and dissolved to obtain a mixed solution.

[0075] 2) Add 573.4 grams of conductive carbon black (solid-to-liquid ratio 1:8) into the mixed solution, stir evenly, add deionized water to submerge the material, soak for 0.5 hours, and obtain wet material after suction filtration and rinsing.

[0076] 3) Add 1000 grams of sodium hydroxide solution (containing 100 grams of sodium hydroxide, 2.5M) with a concentration of 10% to the wet material, stir well to make the mixing uniform, and calcinate at 350 ° C for 6 hours after drying to obtain a sodium ion carrier - Carbon composite powder 1. In the sodium ion carrier-carbon composite powder 1, carbon particles are used as the core, an...

Embodiment 2

[0078] 1) Dissolve 340.32 grams of tetrabutyl titanate (1M) and 266.68 grams of aluminum trichloride (2M) in 5463 grams of methanol to obtain a solution with a total concentration of 10%, and then add 12.14 grams of hexadecyltrimethyl Ammonium chloride (0.2% by weight of the solution) was stirred and dissolved to obtain a mixed solution.

[0079] 2) Add 607 grams of conductive carbon black to the mixed solution (solid-to-liquid ratio 1:10), stir evenly, add deionized water to submerge the material, soak for 2 hours, and obtain wet material after suction filtration and rinsing.

[0080] 3) Add 1000 grams of sodium hydroxide solution (containing 160 grams of sodium hydroxide, 4M) with a concentration of 16% to the wet material, stir well to make the mixing uniform, and calcine at 600 ° C for 3 hours after drying to obtain a sodium ion carrier- Carbon composite powder 2. In the sodium ion carrier-carbon composite powder 2, carbon particles are used as the core, and the surface c...

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Abstract

The invention discloses sodion carrier-carbon composite powder, a self-isolation electrode and a preparation method of the sodion carrier-carbon composite powder. The chemical component of the sodium ion carrier is sodium aluminum titanate, and the sodium ion carrier is a similar isomorphic derivative of sodium trititanate. The sodium aluminum titanate is suitable for being used as an electrode material of a secondary sodium battery, the energy density is higher than that of lithium iron phosphate, and the safety and cost performance are superior to those of various lithium ion electrode materials. Sodium aluminum titanate-carbon composite powder and a self-isolation type sodion carrier-carbon composite electrode based on the composite powder are prepared by adopting an in-situ composite technology. The biggest characteristic of the self-isolation type electrode is that the self-isolation type electrode is provided with an ion diaphragm. Through a crosslinking-precipitation effect, a microporous polymer membrane formed on the surface of the electrode, including the surface of an internal micropore, plays a role of an ion diaphragm. When the self-isolation type electrode is used for assembling the battery, an ion diaphragm does not need to be additionally arranged between the anode and the cathode, so that the manufacturing process is simplified, the comprehensive cost is saved, and the volume of the battery is also reduced.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a sodium ion carrier, a sodium ion carrier-carbon composite powder, a self-isolation sodium ion carrier-carbon composite electrode, and a preparation method of the composite powder and the composite electrode. Background technique [0002] At present, lithium-ion batteries have defects such as shortage of resources, rapid rise in raw material prices, and the risk of spontaneous combustion. It is the development trend of power batteries to replace lithium-ion batteries with sodium-ion batteries. [0003] Ion carriers and ion separators are indispensable components of secondary batteries. The former, as the active material for charge and discharge, is the source of battery energy and the technical core of secondary sodium-ion batteries. The ionic separator is an ionic semi-permeable membrane set between the anode and the cathode, allowing metal cations to pass through, but other c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/583H01M4/62H01M50/414H01M50/46H01M50/491H01M10/054
CPCH01M4/366H01M4/583H01M4/485H01M4/625H01M4/626H01M50/46H01M50/491H01M50/414H01M10/054Y02E60/10
Inventor 叶瑛杜昊张平萍
Owner 杭州怡莱珂科技有限公司
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