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Preparation method of metal hydride/nano carbon composite materials

A technology of alkali metal hydrides and composite materials, applied in nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problems of difficult removal of reaction by-products, low loading efficiency, high preparation cost, etc., and achieve low production cost and simple operation , high efficiency effect

Active Publication Date: 2017-02-15
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[15] Due to the use of organic metals as raw materials in this method, the preparation cost is high, and a large amount of reaction by-products (complex and multi-chain organic compounds) cover the surface of the hydride and are difficult to remove
In addition, since the method uses a solution impregnation method, the loading efficiency is low

Method used

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  • Preparation method of metal hydride/nano carbon composite materials
  • Preparation method of metal hydride/nano carbon composite materials
  • Preparation method of metal hydride/nano carbon composite materials

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: the preparation of NaH / graphene composite material

[0047] In an inert gas glove box, put 1 g of metal Na and 8 g of naphthalene into 500 ml of tetrahydrofuran, and continue stirring for 12 hours to completely dissolve the metal Na and naphthalene to obtain a naphthalene sodium precursor liquid. Transfer the precursor liquid to the reactor, add 0.5 g of graphene at the same time, and feed hydrogen to a pressure of 3 MPa. After the reactor was ultrasonicated for 30 min, it was transferred to an oil bath, continuously stirred and gradually heated to 130° C., and then naturally cooled to room temperature after 12 h of heat preservation. The NaH / graphene composite material can be obtained after filtering or centrifuging, washing with tetrahydrofuran for 2 to 3 times, and drying. The X-ray diffraction patterns and transmission electron microscope images of the synthesized NaH / graphene composites are as follows: figure 1 and 2 shown. figure 1 It shows tha...

Embodiment 2

[0048] Example 2: LiNa 2 H 6 Preparation of graphene composites and their electrochemical lithium storage properties

[0049] First prepare the NaH / graphene composite material, refer to Example 1 for the specific process. In an inert gas glove box, 1 g of the prepared NaH / graphene composite and 0.52 g of LiAlH 4 The powders were mixed and put into a ball mill jar, and ball milled for 36 hours under a hydrogen atmosphere, the ball milling speed was 400 rpm, and the ball-to-material ratio was 30:1 to obtain LiNa 2 H 6 / graphene composite material, the X-ray diffraction patterns and transmission electron microscope images of its products are as follows image 3 and Figure 4 shown. image 3 It shows that this method can synthesize LiNa 2 H 6 . Figure 4 It can be seen that LiNa 2 H 6 The diameter of the nanoparticle is about 25 nm, and its surface is evenly covered with graphene, indicating that this preparation method can realize the composite of multiple metal hydrid...

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Abstract

The invention belongs to the technical field of preparation of nano materials and particularly relates to a preparation method of metal hydride / nano carbon composite materials. The preparation method includes that naphthalene is taken as reaction media, alkali metal is dissolved in tetrahydrofuran to form precursor liquid of naphthalide, and the alkali metal hydride / nano carbon composite materials are prepared with a solvothermal method under hydrogen atmosphere and can be further reacted with other hydrides to be synthesized into multi-metal hydride / nano carbon composite materials. The preparation method is low in cost, high in efficiency, economical and environment friendly and high in universality.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing a metal hydride / nano carbon composite material. Background technique [0002] With the increasing energy crisis and pollution, the development of clean and renewable energy storage systems has become the focus of global attention. Hydrogen energy has attracted widespread attention due to its advantages such as high energy density, clean and pollution-free, and wide range of sources. [1,2] The development of efficient, safe and economical hydrogen storage technology is the key to the large-scale application of hydrogen energy. Compared with other hydrogen storage materials, MgH 2 , NaAlH 4 Metal hydrides such as metals have the advantages of high hydrogen content, low cost, and abundant resources. However, the practical application of metal hydrides faces problems such as high hydrogen desorption temperature and slow hydrogen...

Claims

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Application Information

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IPC IPC(8): H01M4/62B82B3/00B82Y40/00
CPCB82B3/00B82Y40/00H01M4/624H01M4/625Y02E60/10
Inventor 孙大林吴飞龙方方宋云李永涛
Owner FUDAN UNIV