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Electrochemical behavior of nanocrystalline TiNi doped by MWCNTs and Pd

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

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.

Suggested Citation

  • Balcerzak, M. & Nowak, M. & Jakubowicz, J. & Jurczyk, M., 2014. "Electrochemical behavior of nanocrystalline TiNi doped by MWCNTs and Pd," Renewable Energy, Elsevier, vol. 62(C), pages 432-438.
    • Handle: RePEc:eee:renene:v:62:y:2014:i:c:p:432-438
    DOI: 10.1016/j.renene.2013.07.031
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    References listed on IDEAS

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    1. Jankowska, E. & Makowiecka, M. & Jurczyk, M., 2008. "Electrochemical performance of sealed NiMH batteries using nanocrystalline TiNi-type hydride electrodes," Renewable Energy, Elsevier, vol. 33(2), pages 211-215.
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