Synthesis and electrochemical charactristics of NiTi alloy nano compositeinorder to use in supercapacitor

Full density NiTi samples with a composition of Ti-50 wt% Ni are fabricated using hot isostaticpressing (HIP), followed by the HPT process at room temperature, with an applied pressure of 6GPa for 10 turns. The nanostructural analysis reveals that the HIP-processed samples with a B2-NiTi phase evolve into significant grain refinement after HPT process and an interwoven B2-B19′ nanocrystalline/amorphous structure formed, leading to increased hardness in these samples.We demonstrate the efficient synthesis and its capacitive performance was calculated by cyclicvoltammetry and charge–discharge cycling in 6M KOH solution. It is found that the NiTisamples with nafion and PTFE solution electrode exhibits superior capacitive performance withhigh capability at about 500 F g-1 at 2 A g-1, excellent rate capability, and enhancedelectrochemical stability with 91.7% retention after 800 continuous charge-discharge cycles evenat a high current density of 2 mA cm-2.

Keywords:

Nano composite , Nickel , Titanium , Supercapacitor