MSE Ph.D. Defense – Kara Evanoff

MSE Grad Presentation
Event Date:
Thursday, November 14, 2013 - 1:00pm to 3:00pm
Location:
MRDC 4211

School of Materials Science and Engineering

Date: 1 p.m., November 13, 2013

Location: MRDC 4211

Committee Members:
Dr. Gleb Yushin (Advisor, MSE)
Dr. Tom Fuller (ChBE)
Dr. Jud Ready (GTRI)
Dr. Rosario Gerhardt (MSE)
Dr. Brent Carter (MSE)

Title: Highly structured nano-Composite Anodes for Secondary Lithium Ion
Batteries

Abstract:
        Interest in high performance portable energy devices for electronics and
electric vehicles is the basis for a significant level of activity in
battery research in recent history. Li-ion batteries are of particular
interest due to their high energy density, decreasing cost, and adaptable
form factor. A common goal of researchers is to develop new materials that
will lower the cost and weight of Li-ion batteries while simultaneously
improving the performance. There are several approaches to facilitate
improved battery system-level performance including, but not limited to, the
development of new material structures and/or chemistries, manufacturing
techniques, and cell management.
        The performed research sought to enhance the understanding of
structure-property relationships of carbon-containing composite anode
materials in a Li-ion cell through extensive materials and anode performance
characterization. The approach was to focus on the development of new
electrode material designs to yield higher energy and power characteristics,
as well as increased thermal and electrical conductivities or mechanical
strength, using techniques that could be scaled for large volume
manufacturing. Here, three different electrode architectures of nanomaterial
composites were synthesized and characterized. Each electrode structure
consisted of a carbon substrate that was conformally coated with a high Li
capacity material. The dimensionality and design for each structure was
unique, with each offering different advantages. The addition of an external
coating to further increase the stability of high capacity materials was
also investigated.