Electrochemical behavior of nanocrystalline TiNi doped by MWCNTs and Pd

M. Balcerzak, M. Nowak, J. Jakubowicz and M. Jurczyk

Renewable Energy, 2014, vol. 62, issue C, 432-438

Abstract: Mechanical alloying process was introduced to produce nanocrystalline TiNi alloy. X-ray diffraction (XRD) analysis showed that, after 8 h of milling, the starting mixture of elements was decomposed into an amorphous phase. XRD confirmed formation of CsCl-type structure after annealing at 750 °C for 0.5 h. Atomic force microscopy observations revealed that 70% of grains had size below 100 nm. TiNi electrode alloy with and without palladium and/or multiwalled carbon nanotubes (MWCNTs) was prepared by ball co-milling. Scanning electron microscopy observations showed that after co-milling with 5 wt.% MWCNTs, particles size of TiNi alloy decreased. The TiNi + 5 wt.% Pd + 5 wt.% MWCNTs nanocomposite showed the highest discharge capacity (266 mAh/g at 3rd cycle). Addition of MWCNTs improved the electrode cycle stability.

Keywords: Energy storage materials; Nanostructured materials; Mechanical alloying; X-ray diffraction; AFM; SEM (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:62:y:2014:i:c:p:432-438

DOI: 10.1016/j.renene.2013.07.031

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