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Nanometer size lithium metal powder and its preparation method

A technology of nanometer size and powder, which is applied in the field of nanometer size lithium metal powder and its preparation, and can solve problems such as nanometer metal lithium powder that has not been seen yet.

Inactive Publication Date: 2009-08-19
LIAONING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no literature reports on nanometer metal lithium powder and its preparation method by vacuum pyrolysis.

Method used

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  • Nanometer size lithium metal powder and its preparation method

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Embodiment Construction

[0012] Commercial flake metal lithium (Balizhuang Chemical Factory, Chaoyang District, Beijing), cut into small pieces, weigh about 0.4g (50mmol) and 3.2g (25mmol) of naphthalene in a reaction bottle, add 25mL tetrahydrofuran, and keep the temperature in the oil bath at 45°C , turn on the electromagnetic stirrer, and react for a few minutes to generate a black naphthalene lithium metal organic intermediate. After 24 hours of reaction, transfer the organic intermediate to a pyrolysis tube, and perform vacuum pyrolysis (40-150°C) for 2-3 hours. When the naphthalene is completely sublimated, black metal lithium powder remains at the bottom of the bottle. The basic particle size is measured by Japanese Rigaku JEM-1200EX transmission electron microscope in the range of 10-40nm. The reaction was carried out under the protection of inert gas.

[0013] Nano-sized lithium powder is extremely active and burns when it encounters air. React with hydrogen at normal pressure and 40-120°C ...

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Abstract

A Li nanoparticle used to prepare lithium hydride nanoparticle is prepared through reaction between Li flakes and naphthelene in organic solvent to generate intermediate, and vacuum thermodecomposing at 40-150 deg.C.

Description

technical field [0001] The invention relates to nano-sized lithium metal powder and a preparation method thereof. Under mild conditions, lithium and naphthalene in an organic solvent form an organic intermediate, which is vacuum pyrolyzed to obtain a nano-sized lithium metal powder. Background technique [0002] The research of nano science and technology has become one of the most concerned scientific and technological frontiers in the world. Nanomaterial particles are in the range of 1-100nm, have high dispersion, large specific surface area and high surface energy, and their chemical reactivity is 2-4 orders of magnitude higher than that of their corresponding conventional substances. They will have wide application value in the fields of energy, environmental protection, material science, catalytic chemistry and synthetic chemistry. Lithium metal will become an indispensable material in the development and application of new battery materials and hydrogen storage mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/16
Inventor 范荫恒刘通孙铁铮廖世健徐杰
Owner LIAONING NORMAL UNIVERSITY