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A kind of ultra-low temperature battery capacitor and its preparation

A battery capacitance and ultra-low temperature technology, which is applied in the direction of battery electrodes, electrolyte storage battery manufacturing, secondary batteries, etc., can solve the problems of increasing the scope of application, and achieve the advantages of diffusion and electron transmission, de-intercalation, and low-temperature charge and discharge efficiency. Effect

Active Publication Date: 2020-08-21
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low-temperature performance of battery capacitors directly limits its application range and application conditions. Therefore, the development of an ultra-low temperature battery capacitor cell will help to enhance environmental adaptability and increase the application range.

Method used

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  • A kind of ultra-low temperature battery capacitor and its preparation
  • A kind of ultra-low temperature battery capacitor and its preparation
  • A kind of ultra-low temperature battery capacitor and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0041] The ultra-low temperature battery capacitor in the present invention includes a positive electrode sheet, a negative electrode sheet, and a low-temperature electrolyte. The positive electrode sheet includes an aluminum foil coated with a positive electrode material, and the negative electrode sheet includes an aluminum foil sheet coated with a negative electrode material. The positive electrode material is composed of nanoscale lithium electroactive material, nano-scale porous carbon material, positive electrode binder and positive electrode conductive agent, the negative electrode material is compounded from graphite and nano-scale porous carbon composite material, positive electrode binder and positive electrode conductive agent, and the low-temperature electrolyte is composed of multiple solvents , compound electrolyte salt and additives.

[0042] Prepare positive electrode materials, negative electrode materials and low-temperature electrolytes in Examples 1 to 6 acc...

Embodiment 7～12

[0058] The preparation method of ultra-low temperature battery capacitor in the present invention comprises the following steps:

[0059] Prepare the raw materials of the low-temperature electrolyte according to the components in Example 3, add the composite electrolyte salt and additives to the multi-component solvent and mix evenly to make the low-temperature electrolyte;

[0060] Prepare the raw materials of the positive electrode material according to the components in Example 3, dissolve the nanoscale lithium electroactive material, nanoscale porous carbon material, positive electrode binder and positive electrode conductive agent in the nitrogen methyl group after weighing the mass ratio in Table 4 Stir evenly in pyrrolidone to make a positive electrode slurry, and coat it on an aluminum foil to make a positive electrode sheet;

[0061] Prepare the raw material of negative electrode material according to the component in embodiment 3, graphite and nanoscale porous carbon...

Embodiment 13～17

[0069] Prepare the raw materials of the low-temperature electrolyte according to the components in Examples 1, 2, 4-6, respectively, add the composite electrolyte salt and additives to the multi-component solvent and mix well to make the low-temperature electrolyte;

[0070]Prepare the raw materials of the positive electrode material according to the components in Examples 1, 2, 4 to 6 respectively, and the nano-scale lithium electroactive material, the nano-scale porous carbon material, the positive electrode binder and the positive electrode conductive agent according to the mass ratio in Example 10 After weighing, dissolve in nitrogen methyl pyrrolidone and stir evenly to make a positive electrode slurry, which is coated on an aluminum foil to make a positive electrode sheet;

[0071] Prepare the raw material of the negative electrode material according to the components in Examples 1, 2, 4 to 6, dissolve after weighing graphite and nano-scale porous carbon composite materia...

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Abstract

The invention relates to an ultra-low temperature battery capacitor and a preparation method thereof, belonging to the technical field of new energy storage. The capacitor battery of the present invention includes a positive electrode sheet, a negative electrode sheet, and a low-temperature electrolyte, and the positive electrode material coated on the positive electrode sheet is composed of nanoscale lithium electroactive material, nanoscale porous carbon material, positive electrode binder and positive electrode conductive agent. The coated negative electrode material is compounded by graphite and nano-scale porous carbon composite material, negative electrode binder and negative electrode conductive agent, and the low-temperature electrolyte is compounded by multiple solvents, composite electrolyte salts and additives. The battery capacitor of the present invention can work at -40°C, has high charge and discharge efficiency at low temperature, good low-temperature rate performance and cycle stability, and does not affect its high-temperature performance. During the preparation process, water and surface functional groups are strictly controlled to effectively improve the battery Capacitor charge and discharge efficiency and cycle life at low temperature.

Description

technical field [0001] The invention relates to the technical field of new energy storage, in particular to an ultra-low temperature battery capacitor and its preparation. Background technique [0002] Supercapacitors and lithium-ion batteries have their own outstanding advantages and limitations. Compared with lithium-ion batteries, supercapacitors have faster charging and discharging speeds, higher efficiency, charge resistance, and low temperature resistance. The lowest operating temperature is -40°C, and the lowest operating temperature for lithium-ion batteries is -20°C. However, the fast charging and discharging speed and high discharge efficiency of supercapacitors make it more difficult to control the safety, and the low safety voltage of supercapacitors also restricts its application. In practical applications, parallel or series hybrid devices that combine supercapacitors and lithium-ion batteries have the advantages of both. The hybrid battery capacitor is to ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/0566H01M10/058
CPCH01M4/62H01M10/0566H01M10/058Y02E60/10Y02P70/50
Inventor 阮殿波袁峻傅冠生乔志军周洲
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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