摘要:
A carbon foam obtained by heat-treating a mesophase pitch whose softening point is 300° C. or less according to an elevated flow tester, whose ratio (Daromatic/Daliphatic) of the absorption intensity of an aromatic C—H stretching vibration, measured with FT-IR, to the absorption intensity of an aliphatic C—H stretching vibration, measured with FT-IR, is 4.0 or less and whose optically anisotropic content is at least 80%, a graphite foam obtained by heat-treating the carbon foam recited above at a temperature of 2,000° C. or higher and production processes of these.
摘要:
When a pitch composition prepared by mixing 100 parts by weight of mesophase pitch with 10 to 1,000 parts by weight of coal tar pitch, is heat-treated at a temperature of 500° C. or higher, it is possible to produce a high-density coke at a high yield while avoiding the foaming of the mesophase pitch. In addition, when the coke is graphitized at a temperature of 2,000° C. or higher, it is possible to obtain an artificial graphite having a high graphitization degree. Further, when the coke is first pulverized and then graphitized at a temperature of 2,000° C. or higher, it is possible to obtain a high-crystallinity graphite powder which can be suitably used as a carbon material for a negative electrode of non-aqueous solvent type secondary battery having a high discharge capacity and a high charge-discharge efficiency.
摘要:
A carbon material for electric double layer capacitor electrodes which is obtained by a heat treatment and an activation treatment of a material pitch having a softening point in a range of 150 to 350° C., a ratio of amounts by atom of hydrogen to carbon (H/C) in a range of 0.50 to 0.90 and a content of optically anisotropic components of 50% or greater. The material pitch is preferably a synthetic pitch obtained by polymerizing a condensed polycyclic hydrocarbon such as naphthalene, methylnaphthalene, anthracene, phenanthrene, acenaphthene, acenaphthylene and pyrene in the presence of an ultra-strong acid catalyst such as a hydrogen fluoride-boron trifluoride complex. Electric double layer capacitors having a high electrode density and a high electrostatic capacity per unit volume can be constructed using the carbon material.
摘要翻译:一种用于双电层电容电极的碳材料,其通过热处理和软化点在150至350℃范围内的材料沥青的活化处理,氢原子与碳原子的比例( H / C)为0.50〜0.90,光学各向异性成分的含量为50%以上。 材料间距优选为在诸如氟化氢 - 三氟化硼络合物的超强酸催化剂存在下聚合诸如萘,甲基萘,蒽,菲,苊,苊和芘的缩合多环烃而获得的合成沥青。 可以使用碳材料来构造具有高电极密度和每单位体积的高静电容量的双电层电容器。
摘要:
Provided is a production process for a carbon material comprising an alkali activation reaction step in which a carbon precursor containing an activator selected from alkali metal compounds is heated under flow of inert gas. The above alkali activation reaction is carried out while allowing carbon dioxide gas to flow into a downstream part of an alkali activation reaction region on the condition that the carbon dioxide gas is not substantially brought into contact with the carbon precursor and the activator. This makes it possible to carry out alkali activation treatment safely and stably and obtain a carbon material useful for producing an electric double layer capacitor electrode having a high electrostatic capacity.
摘要:
Provided is a production process for a carbon material comprising an alkali activation reaction step in which a carbon precursor containing an activator selected from alkali metal compounds is heated under flow of inert gas. The above alkali activation reaction is carried out while allowing carbon dioxide gas to flow into a downstream part of an alkali activation reaction region on the condition that the carbon dioxide gas is not substantially brought into contact with the carbon precursor and the activator. This makes it possible to carry out alkali activation treatment safely and stably and obtain a carbon material useful for producing an electric double layer capacitor electrode having a high electrostatic capacity.
摘要:
A carbon material for an electric double layer capacitor in which a ratio of hydrogen atoms to carbon atoms, H/C, is not less than 0.2 and a true specific gravity is not less than 1.50 g/ml, is provided. Furthermore, a process for production of an activated carbon for an electric double layer capacitor in which a carbon material having a ratio of hydrogen atoms to carbon atoms, H/C, not less than 0.2, and a true specific gravity not less than 1.5 g/ml is activated, is provided.
摘要:
Provided is a production process for a carbonized product characterized by comprising the following steps (a) to (b): (a) a step in which metal-made or ceramic-made plural granular matters are charged into a heat treating apparatus which is maintained at a temperature of 400° C. or higher and 700° C. or lower and allowed to move therein and in which a carbonized product precursor is fed into the above apparatus and subjected to heat treatment, whereby the carbonized product is adhered on the surface of the above granular matters and (b) a step in which the carbonized product adhered on the surface of the granular matters is heated at a higher temperature than the heat treating temperature in the step (a) and 900° C. or lower, whereby the carbonized product is separated from the granular matters. The present invention provides a production process for an inexpensive and useful carbonized product by simple apparatus and steps.
摘要:
A method for preparing a modified optically isotropic pitch comprising, preparing a synthetic pitch by reacting a member selected from the group consisting of a conjugated polycyclic hydrocarbon containing a low molecular weight alkyl group or a material containing such a substituted hydrocarbon in the presence of hydrofluoric acid/boron trifluoride, and treating the synthetic pitch by passing an oxidizing gas through the synthetic pitch at elevated temperatures.
摘要:
Provided is a production process for a carbonized product characterized by comprising the following steps (a) to (b): (a) a step in which metal-made or ceramic-made plural granular matters are charged into a heat treating apparatus which is maintained at a temperature of 400° C. or higher and 700° C. or lower and allowed to move therein and in which a carbonized product precursor is fed into the above apparatus and subjected to heat treatment, whereby the carbonized product is adhered on the surface of the above granular matters and (b) a step in which the carbonized product adhered on the surface of the granular matters is heated at a higher temperature than the heat treating temperature in the step (a) and 900° C. or lower, whereby the carbonized product is separated from the granular matters. The present invention provides a production process for an inexpensive and useful carbonized product by simple apparatus and steps.
摘要:
A carbonaceous material for use as an anode material in secondary batteries using non-aqueous solvent comprises a material obtained by calcining a solid, the solid, in turn, being obtained by heating tar and/or pitch with furfural in the presence of an acid catalyst, the use of the resulting anode material imparting to the battery a relatively large capacity while having only a small irreversible capacity loss in the first cycle.