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Sodion battery manufacture method

A sodium ion battery, sodium ion technology, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of high cost of metal oxides, low full battery voltage, and high voltage, and achieve the effect of improving cycle stability.

Inactive Publication Date: 2018-10-09
深圳市陆星智农科技有限公司 +1
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Problems solved by technology

The cost of metal oxides is more expensive, which is contrary to the low cost of sodium ions, and the capacity of metal oxide materials is usually not very high, and the cycle stability of most metal oxide materials is not very ideal. The voltage of the metal oxide negative electrode is generally too high, so that the voltage of the full battery will be lower
In contrast, carbon materials are cheap, have higher theoretical capacity, and lower sodium intercalation potential. They are undoubtedly the most ideal negative electrode materials for the commercialization of sodium-ion batteries. Thick SEI film (solid electrolyte interface film), the formation of this SEI film in the full battery consumes the positive electrode material and sodium ions in the electrolyte, which will undoubtedly reduce the total capacity of the full battery a lot. In addition, carbon materials in In the process of sodium intercalation, one-third of the platform is not smooth enough, which will also have a great impact on the voltage of the full battery

Method used

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Embodiment Construction

[0025] Below in conjunction with specific embodiment, the present invention is further elaborated and illustrated:

[0026] Weigh 80mg Na 3.64 Fe 2.18 (P 2 o 7 ) 2 , 10mg acetylene black conductive agent, 10mgPVDF binding agent, get 400 microliters of 1-methyl-2-pyrrolidone (NMP) as a solvent and grind it in an agate mortar for 20 minutes to obtain a black viscous positive electrode slurry. The positive electrode slurry was evenly spread on the aluminum foil, dried under vacuum at 120° C. for 12 hours, and then the aluminum foil was cut into a circle with a diameter of 19 mm by a tablet press to obtain a positive electrode sheet.

[0027] Weigh 80 mg of hard carbon, 10 mg of acetylene black conductive agent, 10 mg of PVDF binder, and take 400 microliters of 1-methyl-2-pyrrolidone (NMP) as a solvent, and grind for 20 minutes in an agate mortar to obtain a black sticky Negative electrode slurry, apply the negative electrode slurry evenly on the aluminum foil with a scraper,...

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Abstract

The invention discloses a sodion battery manufacture method, which comprises the following steps: preparation of a positive electrode sheet; production of a negative electrode sheet; fabrication of aseparator membrane; pre-sodium modification of the negative electrode sheet; and battery assembly. A sodion battery manufactured with the method has good cycle stability.

Description

technical field [0001] The invention relates to the technical field of battery manufacture, in particular to a method for manufacturing a sodium ion battery. Background technique [0002] Today, with the development of electric vehicles and people's demand for mobile Internet devices, lithium-ion batteries have become an indispensable part of people's lives. However, due to the scarcity of lithium resources, the development of lithium-ion batteries is restricted. With the increasing demand for electric vehicles, people's demand for lithium resources is also increasing. Shorter resources. In this severe situation, it is of great significance to develop low-cost and more resource-rich Na-ion batteries. [0003] People's research on the positive and negative electrode materials of sodium ion batteries has never stopped. The research on cathode materials mainly focuses on two types of materials, metal oxides and polyanions. However, because the radius of sodium ions is large...

Claims

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Application Information

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IPC IPC(8): H01M4/1393H01M4/1397H01M4/04H01M10/38
CPCH01M4/0452H01M4/1393H01M4/1397H01M10/38Y02E60/10Y02P70/50
Inventor 陈绍华徐茂文沈博磊
Owner 深圳市陆星智农科技有限公司
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