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Doped-type carbon/manganese sulfide composite material preparation method

A composite material, manganese sulfide technology, applied in nanotechnology, fuel cells, electrochemical generators for materials and surface science, etc., can solve the problem of difficult to achieve large-scale promotion, inability to recover or recycle, and complex synthesis process. and other problems, to achieve the effects of high utilization rate of reaction raw materials, excellent oxygen catalytic performance, and simple preparation process.

Active Publication Date: 2019-11-19
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, it still has the following disadvantages: the synthesis process is cumbersome, and the remaining waste materials in each sub-step reaction are wasted and cannot be recycled or recycled, which is likely to cause resource waste and environmental pollution; the manufacturing cost is high, and it is difficult to realize large-scale Promotion

Method used

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  • Doped-type carbon/manganese sulfide composite material preparation method
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  • Doped-type carbon/manganese sulfide composite material preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Take 0.5 g of sodium nitrate and 45 mL of 70% concentrated sulfuric acid in a 250 mL round-bottomed flask, slowly add 0.5 g of multi-walled carbon nanotubes and 0.5 g of graphite powder in turn under ice bath conditions (around 0 °C), and stir After 20 min, a homogeneous mixture was obtained; add 5 g of potassium permanganate to the above mixture, stir for 10 min, then raise the temperature to 40 °C, and react for 24 h, transfer the reaction product to a 1 L beaker, add deionized Dilute to 500 mL with water, then add 5 mL of hydrogen peroxide (30%), then add 50 mL of 30% concentrated hydrochloric acid, and stir thoroughly for 2 h. After the reaction solution was left to stand for 1 day, the solution was clearly separated, and the supernatant was removed to obtain the lower precipitate. The obtained precipitate was dried, mixed with urea at a mass ratio of 1:6, and calcined at 800 °C for 2 h in a nitrogen atmosphere to obtain nitrogen-sulfur double-doped carbon nanotube / ...

Embodiment 2

[0046] Take 0.5 g of potassium nitrate and 45 mL of 70% concentrated sulfuric acid in a 250 mL round bottom flask, slowly add 1 g of multi-walled carbon nanotubes under ice bath conditions (around 0 °C), and stir for 20 min to obtain a uniform Mixed solution; add 5 g of potassium permanganate to the above mixed solution, stir for 15 min, then heat up to 40 °C, react for 20 h, transfer the reaction product to a 1 L beaker, add deionized water to dilute to 500 mL, Then add 5 mL of hydrogen peroxide (30%), followed by adding 50 mL of 30% concentrated hydrochloric acid, and stir thoroughly for 2 h. After the reaction solution was left to stand for 1 day, the solution was clearly separated, and the supernatant was removed to obtain the lower precipitate. The obtained precipitate was dried, mixed with urea at a mass ratio of 1:10, and calcined at 800 °C for 2 h in a nitrogen atmosphere to finally obtain a nitrogen-sulfur double-doped carbon nanotube / manganese sulfide composite (NSCN...

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Abstract

The invention relates to the manganese sulfide composite material technology field and especially relates to a doped-type carbon / manganese sulfide composite material preparation method. The method comprises the following steps of dissolving inorganic nitrate in an acid solution containing a concentrated sulfuric acid, and then adding an original carbon material and permanganate separately to carryout an oxidation reaction; after the reaction is finished, successively adding a reducing agent and a non-oxidizing strong acid to the reaction solution, thoroughly stirring and then carrying out static layering to obtain a lower layer precipitate; and adding a heteroatom-containing molecular source to the precipitate, carrying out high-temperature heat treatment and finally preparing a doped-type carbon / manganese sulfide composite material. The method has advantages that based on a raw material optimum utilization idea, in a carbon material oxidizing and doping process, manganese / sulfur particles remaining in the oxidation reaction of the carbon material are fully used, and the doped-type carbon / manganese sulfide composite material is obtained through direct heat treatment so that resource wastes and environmental pollution are reduced; and during a whole preparation process, a technology is simple, a reaction raw material utilization rate is high, components of the composite material are uniformly dispersed and quality is better.

Description

technical field [0001] The invention relates to the technical field of manganese sulfide composite materials, in particular to a method for preparing a doped carbon / manganese sulfide composite material. Background technique [0002] Energy and environment are two hot spots that human beings pay attention to in the 21st century. The continuous consumption of non-renewable fossil fuels such as coal and oil and the ensuing environmental pollution problems have gradually become the bottleneck of social development, and the exploration and development of new green and renewable energy has become a breakthrough for human sustainable development. However, renewable energy in the form of wind energy and solar energy has problems such as intermittency and dispersion. The use of electrochemical-based energy storage and conversion devices is the key to realizing the efficient utilization of such renewable energy. [0003] As a new type of energy storage device, lithium-ion batteries h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/0525H01M4/88H01M4/90H01M8/083B82Y30/00
CPCB82Y30/00H01M4/5815H01M4/628H01M4/8825H01M4/90H01M4/9083H01M8/083H01M10/0525H01M2004/027Y02E60/10Y02E60/50
Inventor 陈梁侯朝辉许文苑陈洋羊徐晨曦周民杰何斌鸿王溦
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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