A kind of preparation method of metal oxide layer on the electrolyte surface of sodium battery

A surface metal and electrolyte technology, applied in the field of sodium batteries, can solve the problems of poor stability, uneven internal and external calcination effects, and low quality of sodium batteries, and achieve the effects of improving quality, uniform heating inside and outside, and increasing workload

Active Publication Date: 2022-08-02
钠悦新能源(上海)有限公司
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Problems solved by technology

[0006] prepared, but during the calcination process, the mixture of metal oxide and sodium source tends to have a temperature difference between the inside and the outside. Low quality and poor stability

Method used

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  • A kind of preparation method of metal oxide layer on the electrolyte surface of sodium battery
  • A kind of preparation method of metal oxide layer on the electrolyte surface of sodium battery
  • A kind of preparation method of metal oxide layer on the electrolyte surface of sodium battery

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Embodiment 1

[0050] Please refer to Figure 1-2, a preparation method of the metal oxide layer on the electrolyte surface of a sodium battery, including the following

[0051] step:

[0052] S1. Mix the metal oxide and the sodium source according to the stoichiometric ratio, mix them evenly, put them in the gasification membrane shell for loose pressing, so as to pre-shape, and then program the temperature to the required temperature;

[0053] S2, then carry out the first calcination in an inert atmosphere for 1.5-4h to obtain a primary product; S3, remove the vaporization membrane shell of the primary product, and let it stand to cool down;

[0054] S4. After the first product is ground, the second calcination is carried out for 10-13h in an inert atmosphere, and the target metal oxide layer is obtained.

[0055] The temperature in S2 is 280-410°C, the temperature in S4 is 700-900°C, and the metal oxide in S1 is one or more oxides of Ni, Co, Mn, and Fe.

[0056] The specific steps of loo...

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Abstract

The invention discloses a method for preparing a metal oxide layer on the electrolyte surface of a sodium battery, belonging to the field of sodium batteries. A method for preparing a metal oxide layer on the electrolyte surface of a sodium battery can be achieved by arranging a vaporization membrane shell and cooperating with loose pressing at the same time. Effectively ensure the gap between the mixtures, effectively ensure that the internal and external heating is more uniform during calcination, which is convenient to improve the efficiency and uniformity of the first calcination. , the solidified thermoplastic sealing layer is heated and melted and flows away. At this time, the pressurized inert gas in the side wall of the semi-open shell is ejected from the double Y-shaped holes at high temperature, thereby effectively making the gasification membrane shell The mixture can become more porous and looser under the action of air flow, which is convenient for the calcination inside the mixture to be more uniform, thereby effectively improving the metal oxide layer of the later stage sodium battery, and further improving the quality of the sodium battery using the metal oxide layer.

Description

technical field [0001] The invention relates to the field of sodium batteries, and more particularly, to a method for preparing a metal oxide layer on the electrolyte surface of a sodium battery. Background technique [0002] The electrode materials used in sodium-ion batteries are mainly sodium salts, which are more abundant and cheaper than lithium salts. Because sodium ions are larger than lithium ions, sodium-ion batteries are a cost-effective alternative when weight and energy density are not critical. [0003] Compared with lithium-ion batteries, sodium-ion batteries have the following advantages: the raw material reserves of sodium salts are abundant and the price is low. Compared with ternary cathode materials of lithium-ion batteries, the cost of raw materials is reduced by half by using iron-manganese-nickel-based cathode materials; due to the characteristics of sodium salts , allowing the use of low-concentration electrolyte (the same concentration of electrolyte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/056H01M10/054
CPCH01M10/056H01M10/054Y02E60/10
Inventor 张明义陈思王烨
Owner 钠悦新能源(上海)有限公司
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