Prof. LU Li
National University of Singapore, Singapore
Biography: Dr. Lu is Editor-in-Chief of
Functional Materials Letter, Associate Editor of Materials
Technology – Advanced Functional Materials and editorial board
member of Scientific Reports. Dr. Lu Li is a full professor at
Department of Mechanical Engineering of National University of
Dr. Lu received his Bachelor of
Engineering and Master of Engineering from the Tsinghua University,
People's Republic of China in 1977 and 1982 respectively, and
received his Ph.D from Katholiek Universiteit Leuven, Belgium, in
1989. He joined the National University of Singapore as a research
scientist in 1991 and was promoted to a full Professor in 2004.
Dr. Lu's research interests include nanostructured materials, and functional thin films such as all-solid-state microbatteries and ferroelectric thin films. He has been invited to numerous conferences. He is one of the two authors of Mechanical Alloying, Kluwer Academic Publishers, USA, the first book of its kind in this area. Dr. Lu is also one of the three authors of the books of Laser-induced Materials Processes for Rapid Prototyping, and Image-based Fractal Description of Microstructures, Kluwer Academic Publishers, USA. He has published more than 380 papers in international journals. Dr. Lu has been involved in wide international collaborations in nanostructured materials, ferroelectric thin films and microbatteries with various universities.
Title of Speech: Effect of Graphene on Electrochemical Performance of NASICON-structured Material for Sodium-ion Battery
Abstract: Li-ion batteries have dominated in the current consume market due mainly to their high specific energy and long cycle life. With fast development, Li-ion batteries are not only used in portable electronics but also in electronic vehicles. Fabrication of large quantity of batteries has led to gradually deficient of lithium. As such, exploring new types of energy storage become necessary. Sodium ion has the valency of 1+ with slightly larger radius size than that of Li. In addition, Na is earth abundant. As one of potential cathodes, NASICON-type Na3V2(PO4)3¬¬ (NVP) is a potentially viable cathode material for Na-ion batteries. However, its poor electronic conductivity limits its rate and cycle performance. We adopt co-modification strategy, comprising cation doping and graphene to increase intrinsic and extrinsic conductivity. For Fe3+ doped NVP composites, Na3V1.90Fe0.10(PO4)3/C + rGO delivered the highest initial discharge capacity of 118.4 mAh g-1 at 0.1 C with an impressive capacity retention of 88.7 % after 100 cycles at 20 C (Fig. 1). Among the Co2+ doped NVP samples, Na3V1.95Co0.05(PO¬4)3/C+RGO achieved the highest specific discharge capacity of 112.1 mAh g-1 and maintained a capacity retention of 63.2 % after 100 cycles at 20 C.
Fig. 1 Rate performance of Fe doped NVP and NVP / rGO composite.
Prof. Hao Gong
National University of Singapore, Singapore
Biography: Dr. Hao GONG is a Full Professor of Materials Science and Engineering at National University of Singapore. He is also the coordinator of the transmission electron microscopy laboratory at Department of Materials Science and Engineering. His research interests include transparent oxide conductors and semiconductors (n-type and p-type), energy storage materials and devices (mainly supercapacitors), energy harvest materials and devices (mainly solar cells), gas sensors, functional thin film and nano-materials, materials characterization (mainly on transmission electron microscopy and electron diffraction). Dr. Gong received his B.S. degree in Physics at Yunnan University in 1982. He passed his M.S. courses in Yunnan University, carried out his M.S. thesis research work at Glasgow University, UK, and received M.S. degree of Electron and Ion Physics at Yunnan University in 1987. He then did his PhD at Materials Laboratory at Delft University of Technology, the Netherlands, and obtained PhD degree there in 1992. He joined National University of Singapore in 1992, and is currently full professor at Department of Materials Science and Engineering. He has published about 200 refereed papers in major international journals.
Title of Speech: Some Advanced Materials for Thin Film Solar Cells
Abstract: In this presentation, I will talk about some advance materials for thin film solar cells. Thin film solar cells have great advantages, such as light in weight, only a small amount of active materials used, suitability for flexible solar cells etc. The light in weight can make solar cells to be mountable on many surfaces and mobile systems. A small amount of materials can shorten charge transfer route and consume less source materials. Flexible solar cells have many applications. Various materials for thin film solar cells will be introduced, and emphasize will be on two type of solar cells materials. One is CZTS and another is organic-inorganic perovskite materials, which have high potential for cheap and high efficient solar cells. A new organic-inorganic perovskite will also be introduced.
Prof. Xiaohong Zhu
Sichuan University, China
Biography: Dr. Xiaohong Zhu is currently a full professor at Department of Materials Science, Sichuan University, China. Dr. Zhu received his BSc degree in Materials Physics from Sichuan University in 2000 and PhD degree in Condensed Matter Physics from the Institute of Physics, Chinese Academy of Sciences in 2006. After that, he did 3-year postdoctoral research at CNRS and CEA in France, and then joined Sichuan University as a professor in 2009. From April 2012 to April 2013, he was also a research scholar at the Department of Physics & Department of Materials Science and Engineering, University of California, Berkeley, USA. He was selected as a New Century Excellent Talent in University of China in 2009 and an Outstanding Young Scientific and Technological Leader of Sichuan Province, China in 2011. Dr. Zhu’s research interests include mainly graphene-based electrode materials and novel solid-state electrolytes for energy storage devices (supercapacitors and lithium-ion batteries), piezoelectric ceramics, as well as multifunctional oxide thin films and related electronic devices. Until now, he has authored/co-authored more than 80 SCI-indexed papers and 2 scientific books.
Title of Speech: High-k Dielectric and Ferroelectric Thin Films for Capacitive Applications
Abstract: Capacitors are key passive components in most integrated circuits which are often used in analog filtering, analog-to-digital conversion, signal coupling, dc decoupling, and data storage. The miniaturization of capacitors with high capacitance values requires the use of dielectrics possessing a high capacitance density per unit area, namely, high-k dielectrics. Accordingly, the replacement of traditional dielectrics (εr<10), SiO2 and Si3N4, by oxide materials with higher permittivity is an inevitable trend of development. Oxide high-k dielectric and ferroelectric thin films therefore have great potentials for capacitive applications. In many cases, a high dielectric permittivity, a small quadratic voltage coefficient of capacitance, and a good thermal stability are required, while in some other cases, a high dielectric tunability (voltage-sensitive permittivity), a low dielectric loss, and an appropriate level of dielectric permittivity are basic requirements, e.g. for electrically tunable microwave device applications. Nonetheless, the dielectric properties of thin films are substantially inferior to those of their bulk counterparts, and heavily depend upon the deposition process, base electrodes, microstructure, film thickness, oxygen content, and film homogeneity, etc. Therefore, a great deal of effort is underway to improve the film quality and to push oxide high-k dielectric and ferroelectric films further for practical applications. In addition, a low temperature process can ensure the applicability of high-k and ferroelectric thin films in above-IC technologies and at the same time benefit from a low thermal budget. In this talk, I will present our research breakthroughs in studying the growth mechanism, dielectric properties, and potential applications of several important high-k and ferroelectric thin films, such as (Ba,Sr)TiO3 (BST), Ba(Zr,Ti)O3 (BZT), BiFeO3 (BFO-I), Bi24Fe2O39 (BFO-II), perovskite-structured Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMNT-I), and pyrochlore-structured PbO-MgO-Nb2O5-TiO2 (PMNT-II).
Prof. Alfonso Maffezzoli
University of Salento, Italy
Biography: Alfonso Maffezzoli received his master degree in Mechanical Engineering in 1987 and the Ph.D. degree in Materials Technology at University of Naples in 1991, working also as associate researcher at University of Washington (Seattle, USA). In 1991 he won the Young Scientist Award of the European Materials Research Society (E-MRS). In 1992 he joined to the University of Salento as lecturer and presently he is full professor at the department of engineering for innovation. He leads a research group of about 20 people operating in the area of technology of polymers, composites, ceramics and biomaterials, working on many research project either supported by public institutions either supported by private companies. His didactic activity covered the general aspects of materials science and technology and polymer science at the engineering faculty. He is actually teaching courses on composites science and technology and process modelling. Now he chairs the Ph.D. program in “Materials and structure engineering and nanotechnology”. His research interests are related to polymer, composites and biomaterials. More recently, original contribution were developed in the field of processing of thermoplastic and thermosetting matrix composites, additive manufacturing, bio-based polymers, rotational moulding, ultrasonic characterization of polymers and polymer matrix nanocomposites. He is author of more than 190 papers on international journals besides to several patents and many conference papers. He acts as reviewer for more than 20 international journals.
Title of Speech: Hybrid welding for assembly of thermosetting matrix composite and aluminum components
Abstract: Lightweight and high performance materials find every day new applications in automotive, aeronautic and marine industries often in multi-material structures, where metallic and non-metallic materials are merged to hybrid components. Multi-material design is possible if an efficient joining of dissimilar materials is performed, overcoming the difficulties related to the strong dissimilar physical–chemical properties of the joining materials. In particular a new approach to hybrid welding of composite-to-composite and composite-to-aluminum is proposed. Traditionally, these joints are obtained by adhesive bonding or mechanical fasteners. The latter, is characterized by some drawbacks deriving from drilling of composites, which interrupt fiber continuity, from galvanic corrosion at the metal/composite joint and from an increase of the weight of the structure. Compared to mechanical fastening, adhesive bonding is more appropriate to join thermosetting matrix composites (TSC) and metals to TSC as the load distribution is more uniform over the joining interface. However, also adhesive joining presents some limitations, such as accurate surface preparation, long curing cycles and adhesive premature failure due to peel stresses.
New approaches to composite joining are based on welding processes adapted to the assembly of hybrid structures. The different welding techniques successfully applied to thermoplastic matrix composites are based on the ability of thermoplastic matrices to melt upon heating and then to develop the adhesion strength during cooling. Considering the broad diffusion of TSC, the development of a fusion bonding technique able to join two TSC components or TSC to metal components could open a new scenario for the diffusion of hybrid structures and to improve TSC joints. The key idea is to use welding equipments to join these materials using a thermoplastic layer co-cured on the surface of TSC and then to exploit the melting properties of this material to self join TSC or to join them to aluminum.
Adopting this approach, TSC-TSC joints have been obtained by ultrasonic and induction welding and ultrasonic metal welding has been applied for joining aluminum sheets to carbon fiber reinforced TSC. The weld strength was investigated by mechanical testing and the adhesion mechanism was studied by morphological characterization of cross and failure sections. In both cases good-quality welded joints have been produced, gaining a better insight into these new joining methods.
Assoc. Prof. GUPTA Manoj
National University of Singapore, Singapore
Biography: Prof. Manoj Gupta is currently associated with Materials Division of the Mechanical Engineering Department of National University of Singapore. He did his Ph.D. (Materials Science) from University of California, Irvine, USA (1992), and postdoctoral research at University of Alberta, Canada in the same year.
His current research interests include processing, microstructure and properties evaluation of advanced light weight structural materials. To his credit are: (i) ‘Disintegrated Melt Deposition’ technique, a unique liquid-state processing method, and (ii) ‘Hybrid Microwave Sintering’ technique, an energy efficient solid-state processing method, to synthesize Al and Mg light-metal alloys/micro/nano/metastable-composites.
He has published over 410 peer reviewed research papers in various international journals and owns two US patents related to development of processing techniques and advanced materials. His current h-index is 56, RG index is 45.8 and citations are more than 12000. He has also co-authored four books, ‘Microwave and Metals’ and ‘Magnesium, Magnesium Alloys and Magnesium Composites’, published by John Wiley and ‘Insight into Designing Biocompatible Magnesium Alloys and Composites’ and ‘Metallic Amorphous Alloy Reinforcements in Light Metal Matrices’ by Springer in 2015. He is Editor-in-chief of four journals and hold important editorial positions in 12 other journals. He is also peer reviewer of more than 32 international journals related to materials science. Dr Gupta has the working experience in various countries such as USA, Canada and India besides Singapore. Prof Gupta also received in Dec. 2015 Distinguished Scientist in Engineering Materials award from Venus International Foundation based in Chennai, India for his contributions to the area of materials science. Currently he is also a Visiting Professor of King Saud University and Part-time Lecturer of Kobe University, Japan.
Title of Speech: The Promise of Sustainable Magnesium Composite Technology for Greener Future
Abstract: Ethical research that ensures the enhancement of quality of human life for present and future generations is the need of the day. This inherits the typical requirement to impose zero or minimal stress on the environment. Currently, planet earth is witnessing global warming and largely unpredictable weather changes primarily due to greenhouse gas emissions. Transportation sector is one of the major culprits contributing to more than 30% of total greenhouse gas emissions. One way to mitigate/minimize these emissions is to use lightweight materials in the construction of vehicles for use in land, water, aerospace and space applications. Towards this, magnesium based materials are viable options which are suitable to replace aluminum based materials allowing ~ 35% weight saving on a component basis. As magnesium is abundant in nature and nutritional element, its availability and recyclability is not an issue. Accordingly, this presentation will focus on the development of magnesium based nano/metastable/syntactic composites capable of replacing conventional materials in multiple engineering and biomedical applications.