Shandong Zhongshan Photoelectric Materials Co., Ltd
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Fluorinated graphite is a kind of graphite intercalation compound produced by the direct reaction of carbon and fluorine. Its chemical structure can be represented by (CFx)n. Where X is an indeterminate value, and the size is 0
Fluorinated graphite has high thermal stability and is an electrical and thermal insulator. It is sintered in a small rotary kiln of Fenggu lithium battery powder and is not corroded by strong acids and alkalis. Its lubricating performance exceeds that of molybdenum disulfide and flake graphite. Tests have proved that its wear life is better than molybdenum disulfide at any temperature. As an additive of lubricating wax, graphite with high degree of fluorination can significantly increase the supporting load of the parts and reduce the surface temperature of the lubricating parts.
Because the graphite has a layered structure, the carbon atom spacing in the layers is 1.4?, which are firmly connected by covalent bonds, and the carbon atom spacing between the layers is 3.35?, and there is only a weak van der Waals force between the layers, so the graphite layers are easy to insert Dissimilar substances form graphite intercalation compounds. When the graphite interlayer insert is fluorine, the graphite interlayer compound that can be formed is fluorinated graphite. Fluorinated graphite has different characteristics according to the difference in the fluorine-to-carbon ratio, but only fluorinated graphite (CFx) n with a fluorine-to-carbon ratio of not less than 1 has good chemical and thermal stability. In this kind of fluorinated graphite, fluorine forms a covalent bond with the 2Pz electrons of carbon atoms, the distance between carbon atoms in the layer is increased to 1.52?, and the layer is bent, which loses the conductivity of graphite and becomes an insulator. The electronegativity of the interlayer stretches the interlayer carbon atom distance from 3.35? to 7.O8?, which greatly reduces the interlayer energy and significantly improves the lubricating performance.
(CFx) n-Li battery, widely used in computers, mobile phones, clocks, cameras, camcorders and integrated circuit storage, the battery has the following characteristics: (A) high voltage and current density; the battery has high The voltage and current density. (B) High utilization rate and excellent potential flatness: The battery generates highly conductive carbon, so its utilization rate is 100%. Since the internal resistance does not increase, the discharge potential can be stabilized at the end of discharge. (C) Good storage performance and long duration. Graphite fluoride is stable both electrochemically and thermodynamically, and its self-generation rate is also very small, 0.5% per year. It can be used in a wide temperature range and is generally used. The temperature range is -20~700℃. The type of fluorinated graphite is generally related to the crystallinity and crystal orientation of carbon materials, which indicates the prospects for the production of high-energy batteries. At present, fluorinated graphite batteries have been widely used in foreign countries, including button type, coin type, and cylindrical type. , There are several types of needles.
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