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Functional Oxides for
Enhanced Energy Storage
& Environmental Protection
Dawei Liu Assistant Professor of Materials Science and Engineering
Kazuo Inamori School of EngineeringAlfred University, NY
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PI bioDr. Dawei Liu received his BS degree from Department of Physics in Nanjing University of China in 2004. From 2006 to 2010, he studied in Department of Materials Science and Engineering at University of Washington and obtained his Ph.D. degree in 2010. He was a postdoc research associate in the same research group at the University of Washington from 2010 to 2011 before moving to Brown University as a postdoc research associate. He is now assistant professor of materials science and engineering in Kazuo Inamori School of Engineering at Alfred University.
Dr. Liu’s research focus includes surface modified materials for electrochemical energy storage application and biosensor research, mechanical property studies of oxide thin film as Li-ion battery electrodes and fuel cell electrolyte. He has published more than 30 peer-reviewed papers.
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Energy storage long-term goal
Nanostructured materials behave well in improving both the energy density and power density in lab experiments
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Functional nanostructured oxides Solution based route to fabricate homogeneous nanostructured oxide film: low cost and high productivity
MnO2 nanowall arrays TiO2 nanotube arrays
Liu et al. Adv. Funct. Mater. 2009, 19, 1015 Liu et al. Electrochimi Acta 2009, 54, 6816
Nanostructured electrodes have larger surface area, shorter lithium diffusion path and free volume change and demonstrate high specific energy and specific power specific power improved 1-2 order of magnitude
Wang et. al. Adv. Funct. Mater. 2006, 16, 1133
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Nanostructured electrodes
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Nanostructure disadvantages
Nanostructured electrodes instability in long-term cycling at high temperatures: capacity degradation and safety issues
Angel in lab Hazard on the road
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Surface chemistry engineering
Atomic layer deposition, vacuum or special gas annealingLiu et al. J. Vac. Sci. technol. A 2012, 30, 01A123
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Enhanced energy storage capability
Enhanced cyclic stability, especially at elevated temperature.
After surface chemistry engineering
Before surface chemistry engineering
Liu et al. J. Phys. Chem. C 2011, 115, 4959
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Bio-sensors applicationNanostructured oxides as electrodes to detect bio-hazards
Improved sensitivity after surface chemistry engineering!
Zhang et al. J. Mater. Chem. 2009, 19, 948
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Testing in situ stress development of film electrodes at ambient or elevated temperatures
In situ stress investigation of thin film electrodes
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Key lab facilities
1. HT and LT battery testing system: Mbraun lab-star glove box, Arbin 32-channel battery testerand Espec thermal chamber (-50 °C to 180 °C)
2. Electrochemical Biosensor testing : CHI6015E Electrochemical Analyzer
3. In situ stress investigation system: KSA Multi-beam Optical Stress Sensor (MOS)
4. Equipment for materials synthesis, processing and thermal treatment
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Potential impactsBetter transition from lab experiments to industrial production
Faster transition
No safety issues
