Nam Nguyen

Area of research

Materials Chemistry · Electrical and Electronic Engineering

Research interest

Research topics from publications: Electrical and thermal conductivity improvement of carbon nanotube and silver composites; Highly Conductive and Strong Graphite-Phenolic Resin Composite for Bipolar Plate Applications; Superionic Li-Ion Transport in a Single-Ion Conducting Polymer Blend Electrolyte; Ultra-high conductivity and metallic conduction mechanism of scale-up continuous carbon nanotube sheets by mechanical stretching and stable chemical doping; Direct Printing of Thermal Management Device Using Low‐Cost Composite Ink; High-Performance and Lightweight Thermal Management Devices by 3D Printing and Assembly of Continuous Carbon Nanotube Sheets; Roll-to-roll continuous carbon nanotube sheets with high electrical conductivity; Investigating miscibility and lithium ion transport in blends of poly(ethylene oxide) with a polyanion containing precisely-spaced delocalized charges; Ionic Transport and Thermodynamic Interaction in Precision Polymer Blend Electrolytes for Lithium Batteries; Phase Behavior and Thermal Properties of Precision Polyelectrolyte Blends: The Dilute Charge Regime. Representative work: Composite materials for bipolar plate applications in proton exchange membrane fuel cells were fabricated from synthetic graphite (SG), natural graphite (NG), or expanded graphite (EG) and novolac phenolic resin using compression molding. In comparing the resultant samples, the EG composite exhibited the best properties with a density of ∼1.55 g/cm3, flexural strength of 109 MPa, and modulus of 24 GPa even with a high graphite loading of 80 wt % and a low plate thickness of ∼0.9 mm, as well as in-plane conductivity of 182 S/cm. The EG content was further varied to find the optimal composition. The effects of using carbon nanotube sheets (buckypapers) or multiwalled carbon nanotubes as reinfo Single-ion conducting polymers (SICs) are promising candidates for the next generation of safer polymer electrolytes due to their stability and high transference number. However, the conductivity in SICs is often limited by the mobility of the polymer backbone as the ion mobility is coupled to segmental relaxations. We present polymer blend electrolytes, consisting of a precise single Li-ion conducting polymer with a (trifluoromethanesulfonyl)imide anion pendant group and a low molar mass poly(ethylene oxide) (PEO). Dielectric relaxation spectroscopy is used to probe

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