Abstract
The paper discusses the efficiency of catalytic synthesis and structure of multi-wall carbon nanotubes obtained by acetylene decomposition over Mm (mischmetal)-based multi-component alloy of AB5 type. Different parameters of catalytic chemical vapor deposition process have an influence on the efficiency. Some of them were changed to obtain the highest amount of carbon material. The samples were purified by acid and were characterized by BET surface area measurements, scanning electron microscopy, and transmission electron microscopy analysis. However, both catalyst and parameters of process (such as the flow rate of acetylene) need further examination to make it cost effective. The capacitance properties of carbon nanotubes as electrode materials for electrochemical capacitors are discussed. It has been shown that carbon nanotubes show moderate values of capacitance. In the form of a network, the material provides good charge propagation and can be used as a support and additive for different composite electrode materials.
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