Preparation method of ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material and lithium-sulfur battery

A nano-array and nano-carbon rod technology, which is applied in the preparation of ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod materials, and in the field of lithium-sulfur batteries, can solve the problem of difficult to meet the requirements of secondary batteries and the practical application of fuel cells , Limiting large-scale application and other issues, to achieve the effect of improving electrochemical performance, low cost, and excellent performance

A nano-array and nano-carbon rod technology, which is applied in the preparation of ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod materials, and in the field of lithium-sulfur batteries, can solve the problem of difficult to meet the requirements of secondary batteries and the practical application of fuel cells , Limiting large-scale application and other issues, to achieve the effect of improving electrochemical performance, low cost, and excellent performance

CN109671923BActive Publication Date: 2022-03-04HUNAN UNIV OF TECH
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  • Preparation method of ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material and lithium-sulfur battery
  • Preparation method of ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material and lithium-sulfur battery
  • Preparation method of ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material and lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a method for preparing an ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material, including the following steps:

[0038] S1. Mix and grind the tea seed cake and KOH at a weight ratio of 1:4, put it into a stainless steel autoclave, add 60mL of distilled water and stir evenly, add 20mL of formaldehyde solution with a concentration of 36.5%, seal the autoclave and place it at 80°C 3 hours in a blast drying oven, then react at 180°C for 12 hours, after cooling to room temperature, take out the sample, filter, wash and dry with distilled water to obtain ordered nanoarray precursor carbon rods;

[0039] S2. Place the dried ordered nanoarray precursor carbon rod obtained in step S1 in a quartz boat and place it in a tube furnace, and calcinate it at 800° C. for 2 hours under the protection of argon flow, and use dilute nitric acid and Wash the sample thoroughly with distilled water to obtain an ordered array of ca...

Embodiment 2

[0043]This embodiment provides a method for preparing an ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material, including the following steps:

[0044] S1. Mix and grind nut shells and KOH at a weight ratio of 1:3, put them into a stainless steel autoclave, add 60mL of distilled water and stir evenly, add 20mL of formaldehyde solution with a concentration of 36.5%, seal the autoclave and place it in a drum at 80°C Air drying oven for 3 hours, then react at 180°C for 12 hours, after cooling to room temperature, take out the sample, filter, wash and dry with distilled water to obtain ordered nanoarray precursor carbon rods;

[0045] S2. Place the dried ordered nanoarray precursor carbon rod obtained in step S1 in a quartz boat and place it in a tube furnace, and calcinate it at 800° C. for 1 hour under the protection of argon flow, and use dilute nitric acid and Wash the sample thoroughly with distilled water to obtain an ordered array of ca...

Embodiment 3

[0049] This embodiment provides a method for preparing an ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material, including the following steps:

[0050] S1. Mix and grind the peanut cake and KOH at a weight ratio of 1:4, put it into a stainless steel autoclave, add 60mL of distilled water and stir evenly, add 20mL of formaldehyde solution with a concentration of 36.5%, seal the autoclave and place it in a drum at 80°C Air drying oven for 3 hours, then react at 180°C for 12 hours, after cooling to room temperature, take out the sample, filter, wash and dry with distilled water to obtain ordered nanoarray precursor carbon rods;

[0051] S2. Place the dried ordered nanoarray precursor carbon rod obtained in step S1 in a quartz boat and place it in a tube furnace, and calcinate it at 800° C. for 1 hour under the protection of argon flow, and use dilute nitric acid and Wash the sample thoroughly with distilled water to obtain an ordered array o...

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Abstract

The invention belongs to the technical field of electrode materials, and discloses a method for preparing an ordered nano-array nitrogen-sulfur double-doped carbon / sulfur composite carbon rod material, comprising the following steps: S1. preparing an ordered nano-array precursor carbon rod; S2. Preparation of ordered nano-carbon rod array; S3. Preparation of ordered nano-array nitrogen-sulfur double-doped carbon / sulfur composite carbon rod material; this ordered nano-array nitrogen-sulfur double-doped carbon / sulfur composite carbon rod material is used for lithium / Cathode materials for sulfur-ion batteries. The lithium / sulfur ion battery positive electrode material made of the carbon / sulfur composite carbon rod material of the present invention has better appearance and performance than conventional carbon materials, and when used as a lithium sulfur battery positive electrode material, it has a high initial discharge specific capacity, The capacity retention rate is good, and the preparation method is simple and easy, low in cost, green and environmentally friendly, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and more specifically relates to a preparation method of an ordered nano-array nitrogen-sulfur double-doped carbon-sulfur composite carbon rod material and a lithium-sulfur battery. Background technique [0002] Energy issues and environmental issues are two major issues facing society today. Energy is not only the basis for people's survival, but also an important factor affecting the contemporary economy. For a long time, petroleum, coal, and natural gas have been used as the most important sources of energy. Their excessive use has made the energy structure unreasonable, caused serious environmental pollution, and affected the ecological environment of the earth. The greenhouse effect caused by the emission of carbon dioxide in particular leads to global warming, which also triggers a series of climate changes. In addition, the reserves of fossil fuels are limited, especially the...

Claims

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Application Information

Patent Timeline
04 Mar 2022
Publication
CN109671923B
IPC
H01M4/36; H01M4/38; H01M4/62; H01M10/0525; H01M4/13; B82Y30/00; B82Y40/00
CPC
H01M4/13; H01M4/364; H01M4/38; H01M4/625; H01M4/628; H01M10/0525; B82Y30/00; B82Y40/00
Inventors
陈晗; 卢小伟