Synthesis, characterization and electrochemical performance of Yttrium
metal ions doped Li4Ti5O12nanoparticles for Lithium-ion batteries

Marie Rose Jesina Delavictoirea; D. Muthu Gnana Theresa Nathana; Mary Georgeb; P. Sagayaraja

Abstract

Synthesis, characterization and electrochemical performance of Yttrium metal ions doped Li4Ti5O12nanoparticles for Lithium-ion batteries

Author(s): Marie Rose Jesina Delavictoirea, D. Muthu Gnana Theresa Nathana, Mary Georgeb and P. Sagayaraja

Spinel Li4Ti5O12(LTO) has been considered as a promising anode material in lithium-ion batteries (LIBs). But its disadvantage of low electronic conductivity limits its application to spread wide. This is overcome by dopingsome of the metal ions in the crystal lattice site of LTO. In this regardYttrium metal ions dopedLTO(YxLTO) nanoparticles were fabricated using solvothermal method from TiO2, LiOH.H2O and Y(NO3)3.6H2O as reactants. The synthesized products were subjected to X-ray diffraction analysis (XRD) which showed no change in the crystal structure owing to the substitution of yttrium ions in the titanium site. Also the increased lattice constant, increases the rate of lithium ion diffusion in the electrode material. The morphological studies were performed from Field Emission Scanning Electron Microscopy (FESEM) and High Resolution Transmission Electron Microscopy (HRTEM) along with particle size analysis obtained for varying dopant concentrations. The vibrational groups present in LTO were also identified from Fourier Transform Infrared analysis (FT-IR). Moreover their lithiation–delithiation process were characterized by electrochemical measurement that showedYxLTOto exhibit good cyclic stability, enhanced cyclic behavior and performance in comparison to undoped Li4Ti5O12 nanoparticles (NPs) that could serve as better anodes for LIBs.

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