Preparation method for tissue-derived carbon fiber loaded MoS2 microflower composite material and application in lithium-sulfur battery

A composite material and lithium-sulfur battery technology, applied in lithium batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve problems such as poor electrochemical performance, and achieve high conductivity, easy implementation, and easy-to-obtain raw materials

Inactive Publication Date: 2020-02-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Materials Chemistry A, 2019, 7" reported a nitrogen-doped carbon nanotube / two-dimensional MoS 2 The nanosheet core-shell structure material is used as the positive electrode material in lithium-sulfur batteries. The sulfur loading of the active material is 70%. At 0.5C, the first cycle discharge specific capacity is 1305 mAhg -1 , the capacity decay rate per circle after 100 cycles is 0.2%, in contrast, the electrochemical performance is poor

Method used

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  • Preparation method for tissue-derived carbon fiber loaded MoS2 microflower composite material and application in lithium-sulfur battery
  • Preparation method for tissue-derived carbon fiber loaded MoS2 microflower composite material and application in lithium-sulfur battery
  • Preparation method for tissue-derived carbon fiber loaded MoS2 microflower composite material and application in lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] MoS 2 Preparation of / C: Soak commercial paper towels (Qingfeng) in 20 mL of 1 mol / L HCl for 24 h, then wash with water until neutral, 80 o C dried overnight, dissolved 76.7 mg of ammonium molybdate tetrahydrate and 1 g of thiourea in 20 mL of water, then soaked 76.7 mg of treated paper towels in the above solution, 180 o C hydrothermal treatment for 24 h, then suction filtered, washed to neutral, at 80 o Dry overnight at C, put the obtained sample into a vacuum tube furnace, and place it in an Ar atmosphere at 800 o C calcined for 2 h.

[0041] S-MoS 2 Preparation of / C: Sulfur powder and MoS 2 / C mixed, thoroughly ground, then sealed in vials, and finally put the vials containing the mixture into a vacuum tube furnace under Ar atmosphere at 300 oC heated for 4 hours and cooled to room temperature to obtain S-MoS 2 / C.

[0042] Preparation of slurry: weigh 80 mg S-MoS 2 / C, 10 mg Super . P, 10 mg PVDF, and 200 µL NMP were ball milled for 3 hours and mixed unifo...

Embodiment 2

[0051] MoS 2 / Preparation of C-12: Soak commercial paper towels in 20 mL of 1 mol / L HCl for 24 h, then wash with water until neutral, 80 o C dried overnight, dissolved 76 mg of ammonium molybdate tetrahydrate and 1 g of thiourea in 20 mL of water, then soaked 76 mg of treated paper towels in the above solution, 180 o C hydrothermal treatment for 12 h, then suction filtered, washed with water until neutral, at 80 o Dry overnight at C, put the obtained sample into a vacuum tube furnace, and place it in an Ar atmosphere at 800 o C calcined for 2 h.

[0052] S-MoS 2 Preparation of / C-12: Sulfur powder and MoS 2 / C-12 mixed, fully ground, then sealed in vials, and finally put the vials containing the mixture into a vacuum tube furnace under Ar atmosphere at 300 o C heated for 4 hours and cooled to room temperature to obtain S-MoS 2 / C-12.

[0053] Preparation of slurry: weigh 80 mg S-MoS 2 / C-12, 10 mg Super . P and 10 mg PVDF, 200 µL NMP ball milled for 3 hours and mixed e...

Embodiment 3

[0059] MoS 2 Preparation of / C: Soak commercial paper towels in 20 mL of 1 mol / L HCl for 24 h, then wash with water until neutral, 80 o C dried overnight, dissolved 76 mg of ammonium molybdate tetrahydrate and 1 g of thiourea in 20 mL of water, then soaked 140 mg of treated paper towels in the above solution, 180 o C hydrothermal treatment for 24 h, then suction filtered, washed to neutral, at 80 o Dry overnight at C, put the obtained sample into a vacuum tube furnace, and place it in an Ar atmosphere at 800 o C calcined for 2 h.

[0060] S-MoS 2 Preparation of / C: Sulfur powder and MoS 2 / C mixed, thoroughly ground, then sealed in a vial, and finally put the vial containing the mixture into a vacuum tube furnace under an Ar atmosphere at 300 o C heated for 4 hours and cooled to room temperature to obtain S-MoS 2 / C.

[0061] Preparation of slurry: weigh 80 mg S-MoS 2 / C, 10 mg Super . P, 10 mg PVDF, and 200 µL NMP were ball milled for 3 hours and mixed uniformly to ma...

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Abstract

The invention belongs to the technical field of new energy materials, and particularly relates to a preparation method for a tissue-derived carbon fiber loaded MoS2 microflower composite material andthe application in a lithium-sulfur battery material. The method comprises the following steps of: soaking a commercial tissue in hydrochloric acid for 24 hours and conducting washing with water and drying, dissolving ammonium molybdate tetrahydrate and thiourea in water to obtain a mixed solution, immersing the treated tissue into the mixed solution, carrying out hydrothermal treatment, washing with water, and drying to obtain a sample, and calcining the sample in an inert atmosphere to obtain the tissue-derived carbon fiber loaded MoS2 microflower composite material. The method of preparingthe commercial tissue derived carbon fiber loaded MoS2 microflower composite material is mild, raw materials are easy to obtain, the cost is low, many effective anchoring sites are achieved, and adsorption and catalytic conversion of LiPSs are facilitated. And the content of active substances is as high as 72%.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, in particular to a paper towel derived carbon fiber loaded MoS 2 Preparation method of micron flower composite material and its application in lithium-sulfur battery materials. Background technique [0002] With the rapid development of social economy and the surge in energy demand, in order to reduce the dependence on fossil fuels, people began to pay attention to the development and utilization of clean renewable energy, but these renewable energy are intermittent, so they need to be used in conjunction with advanced energy storage technology To meet the needs of life and production, with the large-scale application of renewable energy, people's demand for high energy / power density, strong stability, long life, high reliability, and low-cost batteries is also increasing. Lithium-sulfur batteries are expected to be the most promising electrochemical storage systems due to their hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M4/62H01M10/052
CPCH01M4/362H01M4/5815H01M4/38H01M4/625H01M10/052H01M2004/028Y02E60/10
Inventor 张昭良刘馨蔓张景皓辛颖李倩
Owner UNIV OF JINAN
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