报告题目:Thermo-iono-electronic materials: Functional oxides in gas separation and energy harvesting 报 告 人:Prof. Feldhoff (Leibniz Universität Hannover, Germany)报告时间888bifa.com ,:3月20日15:00报告地点:逸夫工程馆四楼会议室欢迎广大师生前往!化学与化工学院2019年3月18日报告摘要:It is proposed to look at energy conversion from the point of view of thermo-ionic-electronic materials or systems. In addition to ionic and/or electric charge carriers, entropy is considered as further basic quantity being transported through the material or system if the TIE is simultaneously placed in gradients of temperature and electrochemical potential (ionic and/or electronic). In the basic transport equation, the TIE appears as tensor, which is a major advantage over the concept of the so-called thermodynamics of irreversible processes. The role of energy and its conversion is easily understood by the flux of entropy, ionic charge carriers, and electronic charge carriers at their respective local potentials, which are the temperature, the ionic electrochemical potential, and the electronic electrochemical potential. Conversion of energy is easily understood as the loading of energy from entropy current (thermal energy = heat) to ionic current or electronic current (both electrochemical energy) or vice versa. Analogies between the Soret coefficient (thermo-ionic), the Seebeck coefficient (thermo-electric) and the ionic transfer number (ionic-electronic) become evident. The latter plays an important role in the context of the mixed ionic-electronic conductors , which can be considered as TIEs under isothermal conditions and are of potential use in gas separation membranes. Also the thermoelectric coupling is considered to some detail with a focus on energy harvesting. Lecture will provide a theoretical framework and exemplary experimental results in both fields, energy harvesting as well as gas separation.报告人简介:Prof. Feldhoff is engaged in the Physical Chemistry of Materials, and his research interests are in thermo-iono-electric materials for energy conversion and gas separation. His activities link materials synthesis with the microstructure, as obtained by scanning and transmission electron microscopy as well as x-ray diffraction, and functionality. Aim is always a knowledge-based approach to bring new functionality into materials and devices. He has published more than 150 papers in peer-reviewed journals. Actually, his h-index is 42 with more than 6,000 citations. He received his diploma in physics from the University of Münster and received his PhD degree from the Martin-Luther University Halle-Wittenberg . He was pre- and post-doctoral researcher at the Max Planck Institute of Microstructure Physics in Halle . He was postdoctoral associate at the Department of Materials Science and Engineering at Cornell University in Ithaca and at the Centre d’Études de Chimie Métallurgique of the CNRS in Vitry sur Seine . He is head of the Nanostructure Laboratory at the Institute of Physical Chemistry and Electrochemistry of the Leibniz Universität Hannover and holds the venia legendi for Physical Chemistry. In the German Society for Electron Microscopy, he is serving in the editorial team of Electron Microscopy. He is acting as associate editor of both Energy Harvesting & Systems and the Journal of Electronic Materials.

报告题目:Nanostructured Functional Materials for Energy Storage and Conversion报 告 人:朱挺 博 士 (特聘教授/中南大学材料科学与工程学院)主 持 人:邝泉 副教授报告时间:2018年12月13 日 15:30报告地点:物理楼二楼213室学术报告厅欢迎广大师生参加!物理与光电学院2018年12月11日报告简介:In order to meet the increasing demands of energy consumption in the next decades (eg. more electric vehicles to realize a clean urbanization), material scientists worldwide are working on efficient, low-cost and low-toxic materials for energy harvesting, conversion and storage from clean energy sources. Suitable functional materials should be explored and utilized for relevant energy storage and conversion devices to address those concerns. However, the current materials are usually composed of single constituent or in hybrids of binary inorganic components but with low surface areas. The poor electroactivity with less active sites may further deteriorate the electrochemical performances of the electrodes. Our strategy is to develop low-cost transition metal oxide/sulfide based materials to enhance the electroactivity as well as the electrochemical active surface area , because the hybridization of two or more components affords the opportunity to engineer the electronic and/or surface structures. In addition, optimization of surface structures (such as fabrication of hollow or core-shell hierarchical structures) of nanostructures may bring about extra active sites, probably further prompting the electrochemical performances.报告人简介:Dr. Zhu graduated with a BSc in Materials Chemistry and MSc in Biomedical Engineering from Sichuan University. He then went to Singapore to pursue his PhD degree at Nanyang Technological University in 2009. Upon completion of his PhD in 2013, he worked as a postdoctoral researcher in National University of Singapore. After a three-year postdoctoral research, he joined Central South University in 2017 to serve as a full-time professor. His research work is centered on the development of nanostructured functional materials for energy storage and conversion, such as lithium/sodium ion batteries, supercapacitors, and photo/electro-catalysis. So far, he has authored over 40 research papers in international journals including Adv. Energy Mater., Nano Energy, J. Am. Chem. Soc., Angew. Chem. Int. Ed., J. Mater. Chem. A and so on with a total citation over 3000 times and an H-index of 20.

报告题目:Interface Chemistry for Organic Electronics and Opto-electronics

报告题目:Scalable photoelectrical conversion of solar energy: Organic photovoltaics报 告 人:Olle Inganäs教授,瑞典林雪平大学, 瑞典皇家科学院院士, 诺贝尔物理奖委员会委员邀 请 人:曹镛教授, 中国科学院院士报告时间:2018年11月22日下午16:00-17:30报告地点:科技园国重大楼N308A 学术报告厅欢迎广大师生参加!材料科学与工程学院2018年11月16日报告摘要:Scalable photoelectrical conversion of solar energy: Organic photovoltaicsOlle Inganäs, ProfessorBiomolecular and organic electronics,IFM, Linköping University, Linköping, SwedenThe rapid development of organic photovoltaic materials at present is much due to the change from fullerene acceptors to new families of organic acceptors. Concurrently, development of processing at larger areas is giving promising results, in the form of polymer/polymer blends from green solvents breaking the 10 % barrier. The predicted thermodynamic limits for the power conversion efficiency of organic photovoltaics is reduced by the presence of non-radiative losses, which remain to be suppressed. Old rules for materials development must be substituted with new; high photoluminescence efficiency should be a desired goal for the low bandgap element in a donor/acceptor blend. Transport is dispersive in disordered organic materials; there is no single time-independent mobility, and charge carriers can be collected even if they have a low steady state mobility.From recent studies of transient spectroscopy in ternary blends, we note that the primary act of charge generation may include elements of vibronic coherence; however, at longer times, the charge separated state is stabilized by disorder and entropy. The balance of order and disorder is critical for establishing conditions for efficient charge separation and transport; therefore also the formation of the nanostructure of donor/acceptor blends is a critical element for high performance materials in solar modules, to be produced in printing plants. The upscaling of organic photovoltaic module production is urgent.While silicon and carbon are abundant elements on earth, this is not so for elements like Te, Ga, I,… used in thin film inorganic and hybrid materials. These elements are not fully scalable for global solar electricity supply. While great developments in the power conversion efficiency of OPV is now ongoing, even more important is the steadily improving energy payback time, which is already an order of magnitude shorter than for silicon photovoltaics. This demonstrates that the fastest route of substituting fossil energy by solar energy should use organic photovoltaic materials. These are however not sufficiently stable at present; an intense effort is needed to select and improve the stability of new organic photovoltaic materials in high efficiency modules.报告人简介:Olle Inganäs教授是瑞典皇家科学院院士,诺贝尔物理奖委员会委员 (2012-2016任委员,2016年任主席)。他的科研专注于有机电子领域,并在该领域取得杰出成就。近年来,他在发表SCI论文550多篇,引用次数超过35000次,H因子达99,在2010年荣获瑞典前十名科学论文引用次数科学家。Olle Inganäs is professor of biomolecular and organic electronics, IFM, Linköpings Universitet, Sweden. He received a MSc in engineering physics from Chalmers University of Technology , a BSc in philosophy and economics from Göteborg University , and a PhD in applied physics at Linköping University in 1984. He was appointed professor in 1999. Inganäs received the Göran Gustafsson prize in physics in 1997, and was appointed Wallenberg Scholar 2010-2020. He was elected a member of the Royal Swedish Academy of Sciences, class of physics, in 2006, a member of the Nobel committee for the prize in physics 2012-2016, and chairman in 2016.Inganäs has focused on studies of the class of conjugated polymers throughout areas of polymer physics, electrochemistry, electronics and optics. He has contributed to a number of startup companies in the field of electronic polymers. His current interest include energy conversion and energy storage with organic photovoltaic devices and organic supercabatteries, as well as the use of biopolymers as organisers of electronic polymers. With >550 papers, >35,000 citations and an H index of 99, he has contributed to these areas of science over the last 35 years.



报告人:Prof.Seth Marder