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Preparation method and application of lithium-sulfur battery three-dimensional carbon current collector

A lithium-sulfur battery and current collector technology, applied in the field of electrochemical batteries, to achieve the effects of improving cycle stability, inhibiting migration, and having good cycle stability

Active Publication Date: 2016-04-13
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no literature or patent reports on the use of organic foam materials such as polyurethane foam carbonization to prepare three-dimensional carbon materials as current collectors for lithium-sulfur batteries.

Method used

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  • Preparation method and application of lithium-sulfur battery three-dimensional carbon current collector
  • Preparation method and application of lithium-sulfur battery three-dimensional carbon current collector
  • Preparation method and application of lithium-sulfur battery three-dimensional carbon current collector

Examples

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Effect test

Embodiment 1

[0054] The preparation method of the lithium-sulfur battery three-dimensional carbon current collector of this embodiment includes the steps of: soaking the organic foam material polyurethane foam material in organic solvent ethylene glycol for 6 hours, then ultrasonically treating it for 0.5 hour, washing it with distilled water for 3 times, and placing it in a vacuum In a drying oven, dry at 60°C for 12 hours to obtain a carbon precursor. Under the protection of nitrogen atmosphere, the carbon precursor was heated up to 800°C at a heating rate of 5°C / min, kept for 2 hours, and cooled to room temperature naturally. After taking it out, it was cut to a suitable size with a cutting machine to obtain an elastic lithium-sulfur battery. Three-dimensional carbon current collector. The compressibility of the above polyurethane foam was 60%.

[0055] The three-dimensional carbon current collector for lithium-sulfur batteries in this embodiment is the three-dimensional carbon current...

Embodiment 2

[0066] The preparation method of the lithium-sulfur battery three-dimensional carbon current collector of this embodiment comprises the steps of: soaking the organic foaming material polyurethane foam with the organic solvent acetone for 3 hours, then ultrasonically treating it for 0.5 hour, washing it with distilled water for 3 times, and placing it in a vacuum drying oven , and dried at 120°C for 8h to obtain a carbon precursor. Under the protection of nitrogen atmosphere, the carbon precursor was heated up to 900°C at a heating rate of 5°C / min, kept for 4 hours, and cooled to room temperature naturally. After taking it out, it was cut to a suitable size with a cutting machine to obtain an elastic lithium-sulfur battery. Three-dimensional carbon current collector. The compressibility of the polyurethane foam mentioned above was 90%.

[0067] The three-dimensional carbon current collector for lithium-sulfur batteries in this embodiment is the three-dimensional carbon current...

Embodiment 3

[0077] The preparation method of the lithium-sulfur battery three-dimensional carbon current collector of this embodiment comprises the steps of: soaking the organic foaming material melamine foam in the organic solvent ethylene glycol for 6 hours, then ultrasonically treating it for 0.5 hours, washing it with distilled water for 3 times, and placing it in a vacuum-dried In an oven, dry at 60°C for 12 hours to obtain a carbon precursor. Under the protection of nitrogen atmosphere, the carbon precursor was heated up to 800°C at a heating rate of 5°C / min, kept for 2 hours, and cooled to room temperature naturally. After taking it out, it was cut to a suitable size with a cutting machine to obtain an elastic lithium-sulfur battery. Three-dimensional carbon current collector. The compressibility of the above-mentioned melamine foam material is 90%.

[0078] The three-dimensional carbon current collector for lithium-sulfur batteries in this embodiment is the three-dimensional carb...

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Abstract

The invention relates to the field of electrochemical batteries, in particular to a preparation method of a lithium-sulfur battery three-dimensional carbon current collector and application of the lithium-sulfur battery three-dimensional carbon current collector in a lithium-sulfur battery. The preparation method of the lithium-sulfur battery three-dimensional carbon current collector disclosed by the invention comprises the following steps: soaking an organic foam material with an organic solvent for 2-6 h, washing, drying, and preserving the temperature for 2-6 h at the temperature of 700-900 DEG C under the protection of an inert gas so as to obtain the lithium-sulfur battery three-dimensional carbon current collector, wherein the organic foam material is any one of polyurethane foam and melamine foam; and the organic solvent is any one of ethyl alcohol, ethylene glycol, isopropyl alcohol and acetone. According to the preparation method of the lithium-sulfur battery three-dimensional carbon current collector disclosed by the invention, the current collector is prepared through carbonization under a high temperature by adopting the organic foam material, the three-dimensional structure of the current collector can improve the surface sulfur carrying capacity of the current collector and has certain elasticity, and the volume expansion of sulfur in the charging and discharging process can be accommodated.

Description

technical field [0001] The invention relates to the field of electrochemical batteries, in particular to a preparation method of a three-dimensional carbon collector for a lithium-sulfur battery and an application of the three-dimensional carbon collector for a lithium-sulfur battery in a lithium-sulfur battery. Background technique [0002] With the rapid development of science and technology, energy issues have attracted more and more attention, and the development and utilization of new energy will be a long-term hot spot in the future. However, the utilization of new energy needs to rely on a mature, stable and safe energy storage system. Lithium-ion battery, as a new type of secondary battery, is recognized as one of the most potential energy storage systems. However, its relatively low specific energy and high price limit its development. Therefore, it is of great significance to develop an energy storage system with high energy, low price, long life, and safety. ...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/139H01M4/1393H01M4/1397H01M10/052H01M10/058
CPCH01M4/139H01M4/1393H01M4/1397H01M4/663H01M10/052H01M10/058Y02E60/10Y02P70/50
Inventor 曹朝霞张俊尹艳红乔芸李向南杨书廷
Owner HENAN NORMAL UNIV
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