Abstract
The present study adopts a simple solid-state reaction to successfully prepare phase-pure BaNb3.6O10 as an anode material for lithium-ion batteries. The Rietveld refinement confirms the orthorhombic crystal structure of this material with Pma2 space group. BaNb3.6O10 delivers a specific discharge capacity of 152 mAh/g at a current density of 100 mA/g with a promising capacity retention of 93% after 50 cycles. According to the cyclic voltammetry analysis, BaNb3.6O10 possesses a low polarization of 0.13 V. When the current density is increased five-fold to 500 mA/g, the specific capacity of 119 mAh/g is achieved with a remarkable capacity retention of 78% after 300 cycles. Based on the analysis of cyclic voltammetry and galvanostatic intermittent titration, the diffusion coefficient of BaNb3.6O10 is calculated to be around 10−14 cm2/s. The diffusive contribution towards specific capacity at 0.1 mV/s for BaNb3.6O10 is 67%, which is high than other anodes. Ex-situ XRD analysis reveals that BaNb3.6O10 possesses the same orthorhombic structure after 300 cycles resulting in long term cyclability.
Published Version
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