Pulse Reverse Electrodeposition of Spherical Ni-MWCNT Composite Skein

Watt’s bath and pulse reverse (PR) electrodeposition is used to produce spherical nickelmultiwall carbon nanotubes (Ni-MWCNT) of 2.00, 0.93, 1.63 and 6.71 μm diameter and a variety ofsize distributions. For 60 cycles, an absolute electrodeposition current of 18 A/dm2 is applied atcurrent ratios of ii = idissolution/ideposition = 0, 0.077, 0.200 and 0.368. A simple exponential equation isfitted to each pulse response by a resistance-capacitance (RC) simple model giving different timeconstants usable for diagnosing the effect of different parameters. Results show that PRelectrodeposition is capable of producing microspherical Ni-MWCNT composite skeins of differentdiameters and size distributions. This could be identified with the time constant of the process.