German scientists dig nano "tunnels" in graphite materials

Abstract The Karlsruhe Institute of Technology (KIT) in Germany collaborated with scientists from Rice University in the United States to successfully "cut" nanometer-scale "tunnels" in graphite materials using nickel atoms. It is expected to produce high performance lithium-ion batteries. Porous graphite electrodes provide new technical means...
The German Karlsruhe Institute of Technology (KIT) and scientists at the University of Rice in the United States have successfully used the nickel atom to "cut" a nanometer-scale "tunnel" in graphite materials, which is expected to be a high-performance porous lithium ion battery. Graphite electrodes and the like provide new technical means.

The researchers first introduced metal nickel nanoparticles into the surface of the graphite material and then rapidly heated them in a hydrogen-filled environment. The surface of the metal nickel nanoparticles will act as a catalyst to decouple the carbon atoms in the graphite from the crystal lattice and hydrogen atoms. Combined into gaseous methane. During this process, the metallic nickel nanoparticles will be "sucked" into the tiny "holes" formed on the surface of the graphite material under the action of capillary action, and continue to catalyze the chemical reaction to gradually penetrate into the interior of the graphite material.

This nano-tunnel structure has broad application prospects. For example, the porous graphite material prepared by this process can be used as an electrode material for a lithium ion battery, which can greatly shorten the time required for charging; in the medical field, such a porous graphite material can be used as the material. The carrier for releasing the drug can be directed for a long time. However, if this technique is used to process a material having a similar crystal structure but no conductivity (such as boron nitride), the resulting "tunnel" structure will serve as a support material for nanoelectronic components, such as a novel type. Sensors and solar cells, etc.

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