Solid-state lithium ion battery and preparation method thereof

A lithium-ion battery and solid-state electrolyte technology, which is applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor performance of solid-state lithium-ion batteries, inability to make good contact between electrolyte and electrodes, and achieve easy operation, reduced interface impedance, Performance-enhancing effects

Inactive Publication Date: 2017-11-24
HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the electrolyte is solid, it cannot achieve good contact between the electrolyte and the electrode like a liquid electrolyt

Method used

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  • Solid-state lithium ion battery and preparation method thereof
  • Solid-state lithium ion battery and preparation method thereof
  • Solid-state lithium ion battery and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0024] (1) Preparation of positive electrode sheet

[0025] A Dissolve polyvinylidene fluoride (PVdF) in N-methylpyrrolidone at a concentration of 5wt.%.

[0026] B. After mixing PVdF, conductive carbon, and positive electrode active material in a mass ratio of 10:10:80, stir for at least 1 hour.

[0027] C Evenly coat the slurry obtained in the previous step on the aluminum foil, with a thickness of 100-120μm, dry at 100°C, then dry in a vacuum oven at 120°C, roll pressing, punching, weighing and continue Dry in a vacuum oven at 120°C and put in a glove box for later use.

[0028] (2) Preparation of negative electrode sheet

[0029] Use metal lithium sheet or negative electrode active material to prepare negative electrode sheet using the following steps

[0030] A Dissolve PVdF in N-methylpyrrolidone at a concentration of 5wt.%.

[0031] B. After mixing PVdF, conductive carbon, and negative electrode active material in a mass ratio of 10:10:80, stir for at least 1 hour.

[0032] C Evenl...

Embodiment 1

[0040] Electrolyte: polyvinyl carbonate (mass: 10%) / poly(vinylidene fluoride-hexafluoropropylene) (mass: 50%) + lithium bistrifluoromethanesulfonimide (mass: 40%)

[0041] Cathode active material: lithium iron phosphate

[0042] Negative electrode: lithium metal

[0043] Organic solvent: propylene carbonate

[0044] Organic solvent coating amount, 10μL / cm 2

Embodiment 2

[0046] Electrolyte: Polyethylene carbonate (mass: 60%) + lithium perchlorate (mass: 40%)

[0047] Positive electrode: lithium cobalt oxide

[0048] Negative electrode: lithium metal

[0049] Organic solvent: ethylene carbonate

[0050] Organic solvent coating amount, 100μL / cm 2

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Abstract

The invention discloses a solid-state lithium ion battery and a preparation method thereof. The solid-state lithium ion battery is characterized by comprising a positive electrode, a negative electrode and a solid electrolyte, wherein the solid electrolyte is arranged between the positive electrode and the negative electrode, an organic solvent is dropwise added into the electrolyte and an electrode interface, the contact resistance between the electrolyte and the electrode interface in the solid-state lithium ion battery is reduced, and the performance of the solid-state lithium ion battery is improved. The solid-state lithium ion battery and the preparation method thereof are simple and convenient to operate, the interface resistance can be obviously reduced, and the performance of the solid-state lithium ion battery is improved.

Description

Technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a solid state lithium ion battery and a preparation method thereof. Background technique [0002] Large-scale energy storage systems have become an important part of the future smart grid. The development of high-efficiency energy storage technologies has significant social and economic benefits for improving the utilization efficiency of existing power generation systems, power quality and promoting the widespread application of renewable energy. One of the most promising technologies for industrialization in energy storage technology is electrochemical energy storage technology. Lithium-ion batteries are regarded as the most competitive electrochemical storage technology due to their light weight, high specific energy / specific power, and long life. One of the energy technologies, and its applications in all aspects of energy storage are becoming more and more extensive. However...

Claims

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Application Information

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IPC IPC(8): H01M10/0569H01M10/0525
CPCH01M10/0525H01M10/0569Y02E60/10
Inventor 白永平赵彦彪安茂忠陈国荣白杨李卫东席丹殷晓芬
Owner HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS
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