Details

Autor(en) / Beteiligte

• Sarkar, Sudeep
• Banda, Harish
• Mitra, Sagar

Titel

High capacity lithium-ion battery cathode using LiV(3)O(8) nanorods

Ist Teil von

• Electrochimica acta, 2013-06, Vol.99, p.242-252

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nanorods of LiV(3)O(8) are synthesized using citrate assisted sol-gel method followed by room temperate quenching technique. The physical parameters are identified by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), high resolution transmission electron spectroscopy (HR-TEM). The detailed kinetic studies of these electrodes comprising of different weight percentage of conductive carbon and fixed binder concentration are pursued by cyclic voltammetry (CV), in situ electrochemical impedance spectroscopy (EIS) experiments. The in situ EIS results during lithium-ion intercalation and deintercalation processes are discussed on the basis of equivalent electrical circuit model and analyzed by non linear least square fit method. The estimated kinetic parameters are analyzed after obtaining good agreement between fitted EIS spectra and experimental data. The change in the kinetic parameters with varying offset potentials is also discussed within the experimental limit. Due to high apparent lithium-ion diffusion in solid matrix as well as low charge transfer resistance and relatively high exchange current density value, made this nanorod materials attractive for high rate lithium-ion battery applications. Herein, LiV(3)O(8) nanorods exhibit excellent electrochemical properties and demonstrate superior cycling behavior with first discharge capacity of 338 mAhg(-1), 283 mAhg(-1), 237 mAhg(-1) at 101 mAg(-1) for 30%, 20%, and 10% carbon additive, respectively.