Sodium borohydride/nitrogen-doped graphene hydrogen storage composite material and preparation method thereof

A technology of nitrogen-doped graphene and composite materials, which is applied in the field of sodium borohydride/nitrogen-doped graphene hydrogen storage composite materials and its preparation, achieving the effects of low preparation cost, cheap price, and improved hydrogen desorption performance

Active Publication Date: 2020-06-12
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the addition of NG is not lacking is a way to improve the NaBH 4 Efficient way of hydrogen release performance

Method used

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  • Sodium borohydride/nitrogen-doped graphene hydrogen storage composite material and preparation method thereof
  • Sodium borohydride/nitrogen-doped graphene hydrogen storage composite material and preparation method thereof
  • Sodium borohydride/nitrogen-doped graphene hydrogen storage composite material and preparation method thereof

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Embodiment

[0036] The raw material is commercially available sodium borohydride powder (NaBH 4 , Purity 99 wt%), melamine (C 3 N 3 (NH 2 ) 3 , The purity is 99wt%) and pyrrole (C 4 H 5 N, purity of 99.7 wt%), graphene G dispersion was prepared by a modified Hummers oxidation-reduction method; firstly, 75.53 mLG of dispersion was combined with three nitrogen sources (0.05molC) under ultrasonic vibration. 3 N 3 (NH 2 ) 3 +0.05molC 4 H 5 N,; 0.1mol C 3 N 3 (NH 2 ) 3 ; 0.1mol C 4 H 5 N) Mix thoroughly; then, transfer the three different mixed samples obtained to a hydrothermal autoclave and calcinate at 180°C for 5 hours; then filter, wash and dry the obtained three sets of mixtures at 80°C ; Then the three sets of powder samples obtained are placed in a tube furnace in sequence, and annealed in an argon (Ar) atmosphere at 500 ℃ for 8 hours to obtain three different nitrogen-doped graphene NGX (X=1 , twenty three). The SEM images of three NGX (X=1, 2, 3) prepared by the above hydrothermal meth...

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Abstract

The invention discloses a sodium borohydride / nitrogen-doped graphene hydrogen storage composite material and a preparation method thereof. The hydrogen storage composite material is prepared by takingnitrogen-doped graphene NG as an additive and compounding the additive with sodium borohydride NaBH4, wherein the mass ratio of NaBH4 to NG is 9:1. The preparation method comprises the following steps: firstly, respectively adding three different nitrogen sources (melamine C3N3(NH2)3 + pyrrole C4H5N); C3N3(NH2)3; C4H5N), thereby obtaining three different nitrogen-doped graphene NGX (X = 1, 2, 3);then respectively mixing NaBH4 with the three NGXs in a ratio of 9:1 by adopting a ball milling method in an argon atmosphere to obtain the NaBH4 / NGX hydrogen storage composite system, wherein the rotating speed of the ball mill is 1000 r / min, the ball-to-material ratio is 30:1, andthe ball milling time is 2h, wherein the machine is shut down for 15 min after every ball milling operation for 1 h.The initial hydrogen desorption temperature of the composite material is remarkably reduced compared with that of pure NaBH4 under the same ball milling condition, and rapid dehydrogenation can be achieved. The method is simple in preparation process, wide in raw material source and low in cost, and is a method for effectively improving the hydrogen storage performance of NaBH4.

Description

Technical field [0001] The invention relates to the field of hydrogen storage materials, in particular to a sodium borohydride / nitrogen-doped graphene hydrogen storage composite material and a preparation method thereof. Background technique [0002] With the ever-increasing global energy demand and the rapid deterioration of environmental problems, research on the development and utilization of safe and environmentally friendly renewable new energy is urgent. As a new type of clean energy, hydrogen energy has the characteristics of high energy density, clean and pollution-free combustion products, abundant resources, and diverse production and application forms. It is considered to be the most ideal alternative energy source for fossil fuels. The development and utilization of hydrogen energy mainly includes the production, storage, transportation and use of hydrogen energy. Although a series of major breakthroughs have been achieved in the field of hydrogen production and use, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 张健方艳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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