[CCoE Notice] Thesis Defense: Solid Polymer Electrolyte Based Lithium Ion Battery with Composite Silicon Anode

[Grayson, Audrey A]

Solid Polymer Electrolyte Based Lithium Ion Battery with Composite Silicon Anode

Bhargav Bhamwala Master’ Thesis Dissertation



Defense Date: Thursday, August 2nd, 2018           Time: 2:15 PM

Location: MECE Large Conference Room 202-D, Engineering Building 1

Committee Members: Dr. Haleh Ardebili (Chair), Dr. Jae-Hyun Ryou, Dr. Yashashree Kulkarni



ABSTRACT

     Coupling of Silicon (Si) with carbon (C) realizes a favorable combination of the two materials properties, such as high lithiation capacity of Si and excellent mechanical and conductive properties of C, making silicon/carbon composite (Si/C) ideal candidates for Lithium-ion battery (LIBs) anodes. Solid polymer electrolytes (SPEs) can resolve the safety issues associated with conventional liquid electrolytes while offering mechanical stability and thin film manufacturability.

    In this study, Composite Silicon with different proportion of Silicon and poly (ethylene) oxide were used in anode’s active material and electrolyte respectively. We demonstrated that the composite Silicon anode along with SPEs can run over 200 cycles with 89% of capacity retention. We used electrochemical impedance spectroscopy, morphology, surface conductivity, electrochemical characterization to investigate compatibility of Composite Silicon anode with SPEs. Significant long cycles can be achieved in solid polymer electrolyte-based battery compared to traditional LIBs at high current rate.



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