Speaker
Description
Lithium-ion batteries (LIB) have emerged as the most representative and versatile rechargeable energy-storage system. Among the numerous anode materials used in LIBs, titanium dioxide stands out as an excellent material. However, the poor conductivity of titanium dioxide in its raw form and limited cell capacity have hindered its practical use. In this study, we investigate aluminum-doped titanium dioxide for possible design of titanium-dioxide-based batteries which can offer new directions for enhancing performance. The sol-gel method was used to introduce aluminum into titanium dioxide and subsequently subject it to reduction treatment for the synthesis of aluminum doped non-stoichiometric titanium dioxide to increase the conductivity of titanium dioxide. This study shows that the conductivity of titanium dioxide is enhanced, leading to improved performance in capacity, impedance, cycle life, and rate as an anode material in LIBs. Cyclic stability test under high current condition shows that the capacity remained at 157 mAh/g without any noticeable decay after 750 charge-discharge cycles at a 1C rate. Further, Insitu X-ray diffraction (XRD) analysis using synchrotron radiation was used to explore the behavior of lithium ions intercalating into and deintercalating from the titanium dioxide lattice and draw insights from the variations in the characteristic lattice diffraction peaks. The interaction mechanism between lithium ions and the lattice of mixed-phase (anatase, rutile) is responsible for the understanding of titanium dioxide based batteries for better performance.
| Abstract Category | Materials Physics |
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