Design of novel perovskite KTaO3 nanoflowers via hydrothermal synthesis for electrochemical lithium storage and dopamine biosensing

Abstract

Herein, we first report the hydrothermally synthesised KTaO3 nanoflowers exhibiting good electrochemical performance for lithium ion batteries and electrochemical sensors. Standard analytical techniques were used to characterized the prepared material such as XRD, FTIR, SEM-EDAX, Elemental mapping, TEM and BET surface area. XRD analysis confirms the formation of crystalline cubic phase and the average crystallite size of the materials was found to be ∼49 nm. Further, SEM images show the excellent flower shaped morphology with variable size. An optimized irreversible initial discharge capacity of 697 mAh g−1 was observed for a fabricated electrode having 99% of the Columbic efficiency in the potential range of 0.01–3.00 V. Very less capacity fade was detected and found to be 42 mAh g−1 for 395th cycle. At higher frequency region less conductive resistance was demonstrated by impedance spectra. KTaO3 were also examined for the detection of dopamine at micro molar concentration level and it shows an excellent sensing performance.