Lithium metal negative electrode flexible protection material and preparation method thereof

A lithium metal negative electrode and protective material technology, which is applied in the direction of negative electrodes, lithium batteries, battery electrodes, etc., can solve the problems of failure to achieve commercial application, complicated processing technology of lithium metal negative electrode protective materials, and inapplicability to large-scale production and utilization. , to achieve the effect of enhancing electrical conductivity and energy storage capacity, large specific surface area, and inhibiting growth

Active Publication Date: 2021-09-17
胜利油田科华设备仪器有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above studies put forward the idea of ​​inhibiting dendrite growth, which can inhibit the growth of lithium dendrites to a certain extent, but the treatment process for lithium metal anode protection materials is relatively complicated, which fails to meet the requirements of commercial application and is not suitable for large-scale production. use

Method used

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  • Lithium metal negative electrode flexible protection material and preparation method thereof
  • Lithium metal negative electrode flexible protection material and preparation method thereof
  • Lithium metal negative electrode flexible protection material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Weigh 2.0g nickel acetate tetrahydrate (NiC 4 h 6 o 4 4H 2 0) be dissolved in 150mL ethanol, stirring and dissolving, obtain nickel acetate solution; After cleaning the silk with dehydrated alcohol, then soak the silk of 2.0g in the above-mentioned nickel acetate solution and stir 48h, make the silk surface adsorption one deck nickel ion, Then add 1.0g of 2,4,7-triamino-6-phenylpteridine, through coordination, the surface of nickel ion is coordinated with triphenylpterine, and the nickel ion and triphenylpteridine are loaded. silk fiber; the above-mentioned silk fiber loaded with nickel ions and triteridine was placed in a blast drying oven at 80°C for 12 hours, then pressed into a sheet-like sample, and the sheet-like sample was placed in a nitrogen atmosphere in a tube furnace Sintering at 500°C for 6h, and then cooling to room temperature to obtain a lithium metal negative electrode flexible protection material.

[0022] The obtained lithium metal negative electr...

Embodiment 2

[0024] Weigh 2.0g of nickel acetate tetrahydrate and dissolve it in 150mL of ethanol, stir and dissolve to obtain a nickel acetate solution; wash the silk with absolute ethanol, then soak 2.0g of silk in the above nickel acetate solution and stir for 48h to make the silk A layer of nickel ions is adsorbed on the surface, and then 1.0g of 2,4,7-triamino-6-phenylpteridine is added to coordinate the surface of nickel ions with triaminophenylpteridine to obtain nickel-loaded ions and triphenylteridine silk fibers; the above-mentioned silk fibers loaded with nickel ions and triphenylteridine were placed in a blast drying oven at 80°C for 12 hours, then pressed into a sheet-like sample, and the sheet-like sample was placed Sintering at 700°C for 4 hours in a nitrogen atmosphere in a tube furnace, and then cooling to room temperature, a flexible protective material for lithium metal negative electrodes was obtained. The obtained lithium metal negative electrode flexible protective ma...

Embodiment 3

[0026]Weigh 2.0g of nickel acetate tetrahydrate and dissolve it in 150mL of ethanol, stir and dissolve to obtain a nickel acetate solution; wash the silk with absolute ethanol, then soak 2.0g of silk in the above nickel acetate solution and stir for 48h to make the silk A layer of nickel ions is adsorbed on the surface, and then 1.0g of 2,4,7-triamino-6-phenylpteridine is added to coordinate the surface of nickel ions with triaminophenylpteridine to obtain nickel-loaded ions and triphenylteridine silk fibers; the above-mentioned silk fibers loaded with nickel ions and triphenylteridine were placed in a blast drying oven at 80°C for 12 hours, then pressed into a sheet-like sample, and the sheet-like sample was placed Sintering at 600°C for 5h in a nitrogen atmosphere in a tube furnace, and then cooling to room temperature, a flexible protective material for a lithium metal negative electrode was obtained. Conduct powder X-ray diffraction analysis on the obtained lithium metal n...

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Abstract

The invention discloses a lithium metal negative electrode flexible protection material and a preparation method thereof. Cheap natural silk, nickel salt and 2, 4, 7-triamino-6-phenyl pteridine serve as raw materials, a high-temperature sintering technology is combined in an N2 atmosphere, the lithium metal negative electrode flexible protection material with good electrochemical performance is obtained, and under the condition that the current density is 1.0 mA cm <-2 >, after the lithium metal negative electrode flexible protection material is used 700 times of in cycle, the coulombic efficiency can still be kept at 99.5% or above. The synthesis method is simple, easy to operate, low in cost, low in equipment investment and suitable for batch production.

Description

technical field [0001] The invention belongs to the technical field of lithium metal batteries, and in particular relates to a lithium metal negative electrode flexible protective material and a preparation method thereof. Background technique [0002] Lithium-ion battery is a secondary battery that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. In recent years, lithium-ion batteries have been widely used in energy storage power sources such as hydraulic, thermal, wind and solar power plants, as well as in many fields such as electric bicycles, electric motorcycles, electric vehi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/62H01M10/052H01M10/42
CPCH01M4/382H01M4/628H01M10/052H01M10/4235H01M2004/027Y02E60/10
Inventor 李星韩峻山
Owner 胜利油田科华设备仪器有限责任公司
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