Complex formed from aromatic nitrile compound polymerization product and sulfur, preparation method and uses thereof

A composite and compound technology, applied in the field of electrochemistry, can solve the problem of lithium-sulfur battery cathode material without the preparation method of aromatic nitrile

Inactive Publication Date: 2016-03-16
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, so far, in the prior art, there are no reports on the complexes formed by the polymerization products of aromatic nitrile compounds and sulfur and the corresponding preparation methods and can be used as cathode materials for lithium-sulfur batteries.

Method used

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  • Complex formed from aromatic nitrile compound polymerization product and sulfur, preparation method and uses thereof
  • Complex formed from aromatic nitrile compound polymerization product and sulfur, preparation method and uses thereof
  • Complex formed from aromatic nitrile compound polymerization product and sulfur, preparation method and uses thereof

Examples

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Effect test

Embodiment 1

[0067] This example is used to illustrate the preparation method of the material "polymer / sulfur" provided by the present invention and its preparation and application method as a cathode material for a lithium-sulfur battery.

[0068]Mix 1g (7.81mmol) of terephthalonitrile (CAS No. 623-26-7) and 0.53g (3.9mmol) of anhydrous zinc chloride, and transfer them to a 10ml quartz tube, and replace the quartz with argon air in the tube, seal it and put it into a muffle furnace, react at 700°C for 0.5 hours, cool down to room temperature (25°C) naturally, open the glass tube, take out the polymerization product, and successively use 1mol / L Washed with hydrochloric acid and pure water, then placed in a vacuum oven and dried at 120°C for 10 hours to obtain an N-doped polymer product, which can be used as an oxygen reduction catalyst. Among them, the content of nitrogen in the catalyst is 10.3%, and the specific surface area is 1710m 2 / g, the pore size distribution range is: 0.5~4nm. ...

Embodiment 2

[0072] This example is used to illustrate the preparation method of the material "polymer / sulfur" provided by the present invention and its preparation and application method as a cathode material for a lithium-sulfur battery.

[0073] Mix 1 g (7.81 mmol) of terephthalonitrile (CAS number: 623-26-7) and 10.64 g (78 mmol) of anhydrous zinc chloride, and transfer them to a 10ml quartz tube, and replace the quartz tube with argon After sealing it, put it into a muffle furnace, react at 700°C for 80 hours, cool it to room temperature (25°C) naturally, open the glass tube, take out the polymerized product, and successively wash it with 1mol / L hydrochloric acid , washed with pure water, and then placed in a vacuum drying oven and dried at 120 °C for 10 hours to obtain an N-doped polymer product, which can be used as an oxygen reduction catalyst. In the obtained oxygen reduction catalyst, the content of nitrogen element was 2.1%. The specific surface area is 2980m 2 / g, pore size d...

Embodiment 3

[0077] This example is used to illustrate the preparation method of the material "polymer / sulfur" provided by the present invention and its preparation and application method as a cathode material for a lithium-sulfur battery.

[0078] Mix 1g (7.81mmol) of terephthalonitrile (CAS No.: 623-26-7) and 1.06g (7.8mmol) of anhydrous zinc chloride, and transfer them to a 10ml glass tube, replace the glass with argon air in the tube, seal it and put it into a muffle furnace, react at 300°C for 5 hours, cool down to room temperature (25°C) naturally, open the glass tube, take out the polymerized product, and use 1mol / L of Washed with hydrochloric acid and pure water, then placed in a vacuum oven and dried at 120°C for 10 hours to obtain an N-doped polymer product, which can be used as an oxygen reduction catalyst. Among them, the content of nitrogen in the catalyst is 18.4%, and the specific surface area is 143m 2 / g, the pore size distribution range is: 0.4~2.8nm.

[0079] Mix 500mg...

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Abstract

The invention relates to a complex formed from an aromatic nitrile compound polymerization product and sulfur, a corresponding preparation method, and applications of the complex as a lithium-sulfur battery positive electrode material. According to the present invention, the polymerization product obtained through aromatic nitrile compound monomer polymerization has characteristics of good electric conductivity, high specific surface area, rich pore content, and nitrogen doping, such that the composite material formed from the polymerization product and the sulfur has the high sulfur content, and the sulfur distribution is uniform; with the application of the composite material as the lithium-sulfur battery positive electrode material, the excellent electrochemical property is provided; and the source of the aromatic nitrile compound is rich, and the large-scale preparation of the polymer is easily achieved, such that the application of the complex formed from the aromatic nitrile compound polymerization product and the sulfur in the lithium-sulfur battery provides the great commercial application prospects.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and particularly relates to a complex formed by aromatic nitrile compound polymerization products and sulfur, as well as a corresponding preparation method and use. Background technique [0002] With the advancement of science and technology, people put forward higher requirements for the energy density of batteries. The theoretical energy density of lithium-sulfur batteries reaches 2600wh / kg (the theoretical specific capacity of elemental sulfur is 1680mAh / g). In addition, compared with other batteries, sulfur has the advantages of abundant reserves, environmental friendliness, and low price, so it has attracted extensive attention from the scientific research community and the industrial circle. [0003] However, there are still some serious problems that need to be solved in lithium-sulfur batteries, which are mainly manifested in the performance of lithium-sulfur batteries: poor cycle performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/137H01M4/1399
CPCY02E60/10
Inventor 智林杰郝龙
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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