Date of Graduation

Spring 2013

Degree

Master of Science in Materials Science

Department

Physics, Astronomy and Materials Science

Committee Chair

Kartik Ghosh

Keywords

rechargeable battery, thin films, silicon anode, sputtering, cyclic voltammetry

Subject Categories

Materials Science and Engineering

Abstract

Lithium-ion (Li+) rechargeable batteries, compared to other popular rechargeable batteries, are the most promising candidates for electric vehicles and other uses for their high operating voltage, high energy, and high power density. In recent years, silicon based anode has attracted a lot of attention because of its high capacity of ~3579 mA h g-1 in its fully lithiated state. But the capacity of the silicon based anodes decreases drastically because lithiation results in a drastic increase of volume by 270% in silicon anode resulting in its destruction. In this work, I report the development of amorphous p-type Si thin films for anode applications grown by rf sputtering at 400oC using different rf power. Raman spectroscopy confirmed the presence of silicon. Half-cell reaction of p-type Si thin films was done using cyclic voltammetry to show the specific capacity of the anode. Voltammogram showed that current was decreasing with the increase of number of cycle of charging-discharging due to materials degradation.

Copyright

© Shaikh Tofazzel Hossain

Campus Only

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