A cubic hole carbon coating separator for lithium metal battery and preparation method thereof

A lithium metal battery and cubic technology, applied in the direction of lithium batteries, battery pack components, non-aqueous electrolyte batteries, etc., to achieve the effects of green and environmentally friendly large-scale production, improve lithium ion migration ability, and reduce interface impedance

Active Publication Date: 2021-08-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of separator modification in lithium metal anode protection needs further research and reports.

Method used

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  • A cubic hole carbon coating separator for lithium metal battery and preparation method thereof
  • A cubic hole carbon coating separator for lithium metal battery and preparation method thereof
  • A cubic hole carbon coating separator for lithium metal battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Dissolve 1.1536g of ferric chloride and 0.4474g of manganese chloride in a small amount (5mL) of deionized water, add 20g of sodium oleate and mix well, heat to 80°C, keep warm for 3h and cool to room temperature to obtain template and precursor body mixture;

[0059] (2) Add powdered sodium sulfate 40g to the mixture obtained in step (1), and fully mix to obtain pre-carbonized material;

[0060] (3) Heating the pre-carbonized material to 700°C at a heating rate of 5°C / min in a nitrogen atmosphere, keeping it warm for 4 hours, and then cooling to obtain a cubic-pore carbon material with an inorganic salt template inside;

[0061] (4) Place the cubic-pore carbon material with the inorganic salt template in dilute hydrochloric acid for 6 hours to remove the template, and wash and dry (dry at 100° C. for 24 hours) to obtain a pure cubic-pore carbon material;

[0062] (5) Heating the cubic-pore carbon material to 800° C. at a heating rate of 5° C. / min in a nitrogen atm...

Embodiment 2

[0068] (1) Dissolve 1.1536g of ferric chloride and 0.4474g of manganese chloride in a small amount (5mL) of deionized water, add 10g of sodium oleate and mix well, heat to 80°C, keep warm for 3h and cool to room temperature to obtain template and precursor body mixture;

[0069] (2) Add powdered sodium sulfate 40g to the mixture obtained in step (1), and fully mix to obtain pre-carbonized material;

[0070] (3) Heating the pre-carbonized material to 500°C at a heating rate of 5°C / min in a nitrogen atmosphere, keeping it warm for 4 hours, and then cooling to obtain a cubic-pore carbon material with an inorganic salt template inside;

[0071] (4) Place the cubic-pore carbon material with the inorganic salt template in dilute hydrochloric acid for 6 hours to remove the template, and wash and dry (dry at 100° C. for 24 hours) to obtain a pure cubic-pore carbon material;

[0072] (5) Heating the cubic-pore carbon material to 800° C. at a heating rate of 5° C. / min in a nitrogen atm...

Embodiment 3

[0078] (1) Dissolve 1.1536g of ferric chloride and 0.4474g of manganese chloride in a small amount (5mL) of deionized water, add 7.2g of sodium gluconate and mix well, heat to 80°C, keep warm for 3h and cool to room temperature to obtain the template and a mixture of precursors;

[0079] (2) Add powdered sodium sulfate 80g to the mixture obtained in step (1), and fully mix to obtain pre-carbonized material;

[0080] (3) Heating the pre-carbonized material to 700°C at a heating rate of 5°C / min in a nitrogen atmosphere, keeping it warm for 4 hours, and then cooling to obtain a cubic-pore carbon material with an inorganic salt template inside;

[0081] (4) Place the cubic-pore carbon material with the inorganic salt template in dilute hydrochloric acid for 6 hours to remove the template, and wash and dry (dry at 100° C. for 24 hours) to obtain a pure cubic-pore carbon material;

[0082] (5) Heating the cubic-pore carbon material to 900°C at a heating rate of 5°C / min in a nitroge...

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Abstract

The invention discloses a lithium metal battery cubic hole carbon coating separator and a preparation method thereof, belonging to the technical field of battery materials. The coating material of the lithium metal battery coating diaphragm provided by the present invention has a nano-sheet structure and has cubic holes, and the cubic holes are surrounded by carbon walls; the cubic holes are uniform in size, with a side length of 20-28nm, and are closely stacked arrangement. The coating material is obtained from carbon-containing organic matter through carbonization and then removing templates. The coating material of the invention has good electrolyte wettability, improves the utilization efficiency of the electrolyte, can reduce the interface impedance, and improves the rate capability of the lithium metal battery.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a cubic-pore carbon-coated separator for a lithium metal battery and a preparation method thereof. Background technique [0002] With the rapid development of mobile electronic devices and electric vehicles, lithium secondary batteries with higher energy density are urgently needed for energy storage and power supply. However, lithium-ion batteries are still widely used in the market at present, and the negative electrode uses intercalation compounds such as graphite to store lithium ions, and the theoretical capacity is difficult to meet the application needs. The lithium metal anode has the highest theoretical specific capacity (3860mAh / g) and the lowest electrochemical potential (-3.04V vs. standard hydrogen electrode), making it an ideal choice for anode materials. However, lithium metal has ultra-high reactivity, and uneven deposition during the charge-discharge r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/431H01M50/449H01M50/417H01M50/403H01M10/052B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01M10/052Y02E60/10
Inventor 陈人杰徐赛男赵腾叶玉胜杨天宇屈雯洁吴锋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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