Mesocarbon microbeads

Coals mesophase pitch coal chars coal tar pitch carbon mesocarbon microbeads, carbon fibers semi-coke, calcined coke activated carbons premium cokes, carbon fibers, binder and matrix... 

Polymers mesophase pitch polyacrylonitrile carbons" mesocarbon microbeads, carbon fibers PAN-based carbon fibers ... 

Apart from manifold structures, carbons can have various shapes, forms, and textures, including powders with different particle size distributions, foams, whiskers, foils, felts, papers, fibers [76, 77], spherical particles [76] such as mesocarbon microbeads (MCMB s) [78], etc. Comprehensive overviews are given, for example in [67, 71, 72], Further information on the synthesis and structures of carbonaceous materials can be found in [67, 70, 72, 75, 79]. Details of the surface composition and surface chemistry of carbons are reviewed in Chapter II, Sec. 8, and in Chapter III, Sec. 6, of this handbook. Some aspects of surface chemistry of lithiated carbons will also be discussed in Sec. 5.2.2.3. 

Mesocarbon microbeads (MCMB) particles, obtained from Osaka Gas Co., which are round graphite particles. They are also far from having a smooth morphology and have crevices on their surface. 

Activation is often conducted by processing with steam or chemical agents. Carbons activated by steam can be prepared from raw materials such as coal, peat, or lignite, which are carbonized and reacted with high-temperature water steam, in the process where fraction of carbon atoms are gasified, leaving beside porous structure. Chemically, carbon can also be activated with phosphoric acid. So-called mesocarbon microbeads (MCMBs) were produced from coal tar pitch in the Osaka... 

Earlier, such catalyst was used for the preparation of a 100 W rechargeable bipolar zinc-oxygen battery [328]. Also, nanostructured Mn02 combined with mesocarbon microbeads was prepared and used [329] in such batteries as a catalyst for oxygen reduction, which has a very good electrocatalytic activity with respect to oxygen, and in comparison with electrolytic Mn02. Prepared with this material, the all solid-state zinc-air cell... 

Liquid-phase carbonization Pitch, coal tar Cokes Mesocarbon microbeads (MCMB) Spherical particles... 

As described in Section 3.3.3.1, the PFA-P7-H carbon better inherits the structural regularity from the parent zeolite than the other carbons. Moreover, the pore structure of this carbon is unique and it has never been found in any type of carbon. Its detail will be explained in this section in comparison with three commercial activated carbons MSC-30 (Kansai Coke and Chemicals), M-30 (Osaka Gas), and ACF-20 (Osaka Gas). The former two carbons were prepared from petroleum coke and mesocarbon microbeads, respectively, and both were activated with KOH. The last sample was activated with carbon fibers (ACFs). All are characterized by a large BET SSA. 

FIGURE 26.11 The first- and second-charge discharge curves of mesocarbon microbeads heat-treated at 2073 K cycled at a rate of C/36. (Reprinted with permission from Z. Ogumi and M. Inaba, Carbon anodes, m Advances in Lithium-Ion Batteries, W.A. Schalkwijk and B. Scrosati, Eds., Kluwer Academic, New York, 2002. Copyright 2002 Kluwer Academic Publishers.)... 

Mabuchi, A., Tokumitsu, K., Fujimoto, H., and Kasuh, T., Charge-discharge characteristics of the mesocarbon microbeads heat-treated at different temperatures, J. Electrochem. Soc., 142, 1041, 1995. 

Fig. 4. Experimental (target) and simulated carbon-carbon radial distribution function for an activated mesocarbon microbead adsorbent [32]. The RDFs are reported in the form 471 r fi[g(r) — 1], where p is the average carbon density and r is the carbon pair separation distance noted on the horizontal axis. The simulated RDFs for the initial and converged (dashed line) model structures are shown, with numbered peaks referenced in the text.

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