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Me-RGO (Reduced Graphene Oxide)/LiBH4 hydrogen storage material with high hydrogen storage capacity and preparation methods of Me-RGO/LiBH4 hydrogen storage material

A hydrogen storage material and a hydrogen storage technology are applied in the field of Me-RGO/LiBH4 high hydrogen storage capacity composite hydrogen storage material and its preparation, which can solve the problems of high hydrogen desorption temperature and harsh hydrogen absorption conditions, and achieve simple process and synthesis. Convenience and the effect of improving utilization

Inactive Publication Date: 2013-02-06
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to overcome the existing LiBH in the prior art 4 Due to the shortcomings of high hydrogen desorption temperature and harsh hydrogen absorption conditions, a Me-RGO / LiBH 4 Composite hydrogen storage material with high hydrogen storage capacity and preparation method thereof

Method used

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  • Me-RGO (Reduced Graphene Oxide)/LiBH4 hydrogen storage material with high hydrogen storage capacity and preparation methods of Me-RGO/LiBH4 hydrogen storage material
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  • Me-RGO (Reduced Graphene Oxide)/LiBH4 hydrogen storage material with high hydrogen storage capacity and preparation methods of Me-RGO/LiBH4 hydrogen storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of Pd-RGO / LiBH 4 Composite hydrogen storage material with high hydrogen storage capacity, including 30wt.% LiBH 4 material and 70wt.% of Pd-RGO material, Pd accounts for 60wt.% of Pd-RGO material, the surface of RGO material has dense pores, LiBH 4 The material is evenly dispersed in the pores of the RGO material. RGO is prepared by a chemical redox method. RGO has a pore size of 2~12nm and a pore volume of 0.08~1.2cm 3 / g and 800~2540m 2 / g specific surface area.

[0041] The above Pd-RGO / LiBH 4 Preparation method of composite hydrogen storage material with high hydrogen storage capacity:

[0042] 1) Synthesis of graphene (RGO) with controllable pore size and specific surface area by chemical redox method

[0043] Graphite oxide (GO) was prepared by a modified Hummers method. First weigh 0.5g graphite, 0.25g KNO 3 , placed in a 500mL three-neck flask, add 12mL concentrated H 2 SO 4 , and magnetically stirred for 30 min in an ice-bath environment. The...

Embodiment 2

[0054] A kind of Pd-RGO / LiBH 4 Composite hydrogen storage materials with high hydrogen storage capacity, including 70wt.% LiBH 4 material and 30wt.% Pd-RGO material, the percentage of Pd in ​​Pd-RGO material is 60wt.%, the surface of RGO material has dense pores, LiBH 4 The material is evenly dispersed in the pores of the RGO material. RGO is prepared by a chemical redox method. RGO has a pore size of 2~12nm and a pore volume of 0.08~1.2cm 3 / g and 800~2540m 2 / g specific surface area.

[0055] Pd-RGO / LiBH 4 Preparation method of composite hydrogen storage material with high hydrogen storage capacity:

[0056] 1) The preparation methods of RGO and Pd-RGO materials are the same as in Example 1.

[0057] 2) Preparation of Pd-RGO doped LiBH by melt infiltration method 4

[0058] The Pd-RGO and LiBH 4 Mix evenly according to the mass ratio of 30:70, place it in a stainless steel reaction kettle, and then fill it with H with an initial pressure of 20atm 2 , and then acco...

Embodiment 3

[0060] A kind of Pd-RGO / LiBH 4 Composite hydrogen storage materials with high hydrogen storage capacity, including 97wt% LiBH 4material and 3wt%Pd-RGO material, the surface of RGO material has dense pores, LiBH 4 The material is evenly dispersed in the pores of the RGO material. RGO is prepared by a chemical redox method. RGO has a pore size of 2~12nm and a pore volume of 0.08~1.2cm 3 / g and 800~2540m 2 / g specific surface area.

[0061] Pd-RGO / LiBH 4 Preparation method of composite hydrogen storage material with high hydrogen storage capacity:

[0062] 1) The preparation methods of RGO and Pd-RGO materials are the same as in Example 1.

[0063] 2) Preparation of Pd-RGO doped LiBH by melt infiltration method 4

[0064] The Pd-RGO and LiBH 4 Mix evenly according to the mass ratio of 3:97, place it in a stainless steel reactor, and then fill it with H with an initial pressure of 200atm 2 , and then according to LiBH 4 The theoretical melting point is 268°C and the mi...

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Abstract

The invention provides a Me-RGO (Reduced Graphene Oxide) modified LiBH4 hydrogen storage material with high hydrogen storage capacity and preparation methods of the Me-RGO modified LiBH4 hydrogen storage material. A uniformly-dispersed Me-RGO catalyst with a high special surface is compounded on the surface of the hydrogen storage material LiBH4 at the inert gas shielding atmosphere by respectively using a solid-phase high-speed ball-milling method, a melt infiltration method and a liquid-phase dispersion method to prepare the hydrogen storage material with high hydrogen storage capacity. The preparation methods of the Me-RGO catalyst with high dispensability include an aqueous phase complex reduction method, a vapour phase reduction method, an ion exchange method, a sol-gel method, a hydrothermal method, a vacuum sputtering method and a gas evaporation method. Even if the content of the used Me-RGO catalyst is as low as 3wt.%, the hydrogen discharging temperature of LiBH4 can also be greatly reduced, and meanwhile, the low-temperature hydrogen discharging capacity and the circulated hydrogen absorption and discharging properties of LiBH4 can be improved.

Description

technical field [0001] The invention relates to the field of modification of hydrogen storage materials, and provides a Me-RGO / LiBH with high capacity, low-temperature dehydrogenation and excellent reversible hydrogen charging and decharging performance 4 Composite hydrogen storage material with high hydrogen storage capacity and preparation method thereof. Background technique [0002] Hydrogen energy has become a new type of clean energy with great development potential in the 21st century due to its high thermal efficiency in the combustion process (combustion value is three times that of gasoline), no exhaust emissions, and the product is water. A large number of demonstrative applications have emerged in electric vehicles powered by oxygen fuel cells. Solid material hydrogen storage plays an important role in the development and utilization of hydrogen energy because of its advantages of no need for high pressure and heat-insulated containers, good safety, and low cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06
CPCY02E60/36
Inventor 许娟孟蓉蓉曹剑瑜陈智栋王文昌
Owner CHANGZHOU UNIV
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