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Solid-state lithium ion electrode, solid-state lithium ion battery and preparation method of solid-state lithium ion electrode

A technology of lithium-ion batteries and solid-state electrolytes, applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, secondary batteries, etc. The effect of eliminating the injection process, simplifying the manufacturing process, and improving safety

Inactive Publication Date: 2013-12-25
向勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has low efficiency and high cost, and is not suitable for manufacturing thicker electrodes, nor is it suitable for manufacturing large-capacity lithium-ion batteries (such as Chinese patent application publication number CN102891317A)

Method used

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  • Solid-state lithium ion electrode, solid-state lithium ion battery and preparation method of solid-state lithium ion electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Slowly add 5kg of active material lithium iron phosphate, 165g of solid electrolyte LiPON, 110g of conductive carbon black, and 220g of binder PVDF into the double planetary mixer with a spoon, stir slowly at 10rpm for 30min, and divide 4100g of solvent NMP into four times Add to the mixed material, stir under vacuum state for 1-2 hours after each addition, and turn on the circulating water to cool the stirring tank, and the stirring speed is 15rpm, 20rpm, 30rpm, 40rpm in turn.

[0025] After the stirring, the obtained slurry was taken out, coated on both sides of the aluminum foil with a transfer coater and dried in an oven. The thickness of the aluminum foil used is 20um, the baking temperature of the oven is 80-120°C, and the coating surface density of the active material layer is 30±0.6mg / cm 2 .

[0026] After the coating is completed, use a roller press to roll the pole piece with a pressure of 170-260T. The above manufacturing processes are all carried out in an...

Embodiment 2

[0028] 4152.5g active material LiMnPO 4 , 550g solid electrolyte LLT, 247.5g carbon fiber, 550g binder polytetrafluoroethylene were slowly added to the double planetary mixer with a spoon, and after stirring slowly at 10rpm for 30min, 2357g solvent NMP was added to the mixture in four times, After each addition, stir under vacuum for 1-2 hours, and turn on the circulating water to cool the stirring tank, and the stirring speed is 15rpm, 20rpm, 30rpm, 40rpm in turn.

[0029] After the stirring, the obtained slurry was taken out, coated on both sides of the aluminum foil with an extrusion coater and dried in an oven. The thickness of the aluminum foil used is 20um, the baking temperature of the oven is 80-120°C, and the coating surface density of the active material layer is 30±0.6mg / cm 2 .

[0030] After the coating is completed, use a roller press to roll the pole piece with a pressure of 170-260T. The above manufacturing processes are all carried out in an environment with...

Embodiment 3

[0032] 5170g active material LiNi x co y mn z o 2 (x: 1 / 3, y: 1 / 3, z: 1 / 3), 110g solid electrolyte lithium vanadium silicon oxide compound, 110g acetylene black, 110g binder polyvinyl chloride are slowly added to the double planetary mixer with a spoon After stirring slowly at 10rpm for 30min, add 2357g solvent NMP into the mixture in four times, stir for 1-2 hours under vacuum after each addition, and turn on the circulating water to cool the stirring tank. The stirring rate is 15rpm, 20rpm, 30rpm, 40rpm.

[0033] After the stirring is finished, the obtained slurry is taken out, coated on both sides of the carbon-coated aluminum foil with a sprayer and dried in an oven. The thickness of the aluminum foil used is 20um, the baking temperature of the oven is 80-120°C, and the coating surface density of the active material layer is 30±0.6mg / cm 2 .

[0034] After the coating is completed, use a roller press to roll the pole piece with a pressure of 170-260T. The above manuf...

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Abstract

The invention provides a solid-state lithium ion electrode, a solid-state lithium ion battery and a preparation method of the solid-state lithium ion electrode. The solid-state lithium ion battery electrode is composed of a metal current collector, and an active material, a conductive agent, solid electrolyte and a binder, which are attached on the current collector. During the electrode manufacture, the slurry containing the active material and the like is coated on the current collector, the method is suitable for continuous and batch production compared with a deposition method and a compression powder method.

Description

technical field [0001] The invention belongs to the field of lithium battery manufacturing, and in particular relates to a solid lithium ion battery, an electrode and a preparation method thereof. Background technique [0002] Secondary batteries are an important part of laptop batteries, electric vehicles, mobile phones and other electronic devices. Among various secondary power sources, lithium-ion batteries are widely used due to their high specific energy and long cycle life. However, since lithium-ion uses a liquid flammable electrolyte, the safety of lithium-ion batteries needs to be improved urgently. Polymer gel lithium-ion batteries use gel electrolyte materials to replace the diaphragm and part of the electrolyte in traditional liquid lithium-ion batteries, but after the battery is assembled, it is still necessary to inject liquid electrolyte into the battery pack (shell) (China Patent Authorization Announcement No. CN101677139B) or use a liquid electrolyte to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139H01M10/0562H01M10/0525H01M10/058
CPCY02E60/10Y02P70/50
Inventor 向勇臧亮尹从明
Owner 向勇
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