Poly(Ethylene Oxide)/Graphene Oxide Polymer Nanocomposite Electrolyte for Lithium Ion Batteries

Solid polymer electrolytes (SPEs) can resolve the safety problems associated with the traditional liquid electrolytes while offering mechanical stability and thin film manufacturability. The main issue with SPEs is the lower ionic conductivity at room temperature compared to that of liquid electrolytes. Nanosized ceramic powders are known to enhance the ionic conductivity as well as the mechanical stability of solid polymer electrolytes. In this study, graphene oxide (GO) nanosheets were used as nanosized fillers in polyethylene oxide (PEO) electrolyte. We demonstrated that about an order of magnitude improvement in lithium-ion conductivity, as high as 10-4 S/cm at room temperature, was achieved with GO fillers. We used thermal analysis, impedance spectroscopy, fourier transform infrared, and morphology analysis to investigate the GO/PEO films. A significant improvement in the tensile strength of the polymer electrolyte was observed with only 1 wt % GO fillers while the % elongation remains uncompromised.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Houston

Year dc:date.issued

2013

Author dc:creator

• Yuan, Mengying

Advisor dc:contributor.advisor

• Ardebili, Haleh

Committee members dc:contributor.committeemember

• Ryou, Jae-Hyun
• Yao, Yan

• Graphene oxide
• Batteries
• Polymer Nanocomposite Electrolyte
• Lithium-ion batteries (LIB)

Statement dc:rights

• The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/10657/1086

OAI identifier oai:identifier

oai:uh-ir.tdl.org:10657/1086