关于举行华南理工大学“海内外优秀青年学者论
分类:科技中心

www.2492777.com,广大师生:华南理工大学海内外优秀青年学者论坛旨在面向全球邀请拥有不同学术背景的青年才俊,围绕国际科学前沿、热点研究领域以及行业产业的技术问题等展开探讨和交流。通过这个平台,互相启迪、开拓视野,增强国际交流与合作,促进双方共同发展。现将近期学术活动安排如下:一、论坛时间:2018年12月24日9:00二、论坛地点:华南理工大学14号楼205会议室三、论坛报告人和题目:张凯,Tuning the Electrochemical Redox Mechanism of Cathode and Anode Materials for Sodium-ion Batteries欢迎广大师生前来参加!材料科学与工程学院2018年12月11日报告人简介:Kai Zhang received his Ph.D. in 2015 and B.S. in 2010 from College of Chemistry at Nankai University (China) under the supervision of Professor Jun Chen. His major is material physics and chemistry. From Aug. 2015, he works as a postdoctoral researcher in the group of Professor Yong-Mook Kang at Department of Energy and Materials Engineering in Dongguk University-Seoul (Korea). From Jun. 2016, he becomes a Korean Research Fellowship (KRF) member. His research focuses on lithium-ion, lithium-sulfur, and sodium-ion batteries. He has published 17 papers as the first author such as Chem. Soc. Rev., Adv. Mater., Angew. Chem., and Adv. Energy Mater.. In addition, He also cooperated with other co-workers to published 25 papers. His citation time and h-index are 3846 and 27, respectively.报告简介:Sodium-ion batteries (SIBs) are receiving increasing interesting today because they are viewed as ideal candidates that can at least partially substitute for Li-ion batteries. In the case of cathode materials, Mn-based layered oxides become promising because of their high theoretical capacity and good sodium ion conductivity; however, Jahn-Teller distortion arising from the Mn3 centers severely impacts their cyclic life. Herein, to stabilize their structure, Zn-doped Na0.833[Li0.25Mn0.75]O2 has been designed to not only suppress the Jahn-Teller distortion but also reduce its inherent phase separations. The reduction of Mn3 amount in Zn-doped sample, as predicted by first-principles calculations, has been confirmed by its high binding energies and the reduced octahedral structural variations. In the viewpoint of thermodynamics, Zn-doped sample has lower formation energy, more stable ground states, and fewer spinodal decomposition regions than those of undoped sample, all of which make it charge or discharge without any phase transition. Hence, Zn-doped sample shows superior cycling performance, demonstrating that Zn doping is an effective strategy for developing high-performance layered cathode materials. The anode materials are important components of SIBs, but exploiting high-performance anode materials is still a big challenge. Transition-metal dichalcogenides combined with ether-based electrolytes and optimized cut-off voltages have been expected to be promising anode materials for SIBs. In this work, a series of transition-metal dichalcogenides and phosphorus were prepared via facile methods and for the first time used as anode materials for SIBs. They have presented high capacity, long-term cyclability, and high-rate capability. The redox reactions of these abode materials are dominated by pseudocapacitive behaviors, leading to fast Na insertion/extraction and durable cyclic life. It indicates that the transition-metal dichalcogenides and phosphorus can be promising anode materials for SIBs.附件:无

广大师生:华南理工大学海内外优秀青年学者论坛于2015年11月首次启动,旨在面向全球邀请拥有不同学术背景的青年才俊,围绕国际科学前沿、热点研究领域以及行业产业的技术问题等展开探讨和交流。通过这个平台,互相启迪、开拓视野,增强国际交流与合作,促进双方共同发展。一、论坛时间2018年12月24日(星期一)15:00二、论坛地点华南理工大学五山校区物理楼(18号楼)2楼213室学术报告厅三、论坛议程

时间

事项或议程

12月24日(星期一)下午15:00-15:50

本文由www.2492777.com发布于科技中心,转载请注明出处:关于举行华南理工大学“海内外优秀青年学者论

上一篇:历时五载,朱诺号探测器抵达木星!www.2492777.c 下一篇:没有了
猜你喜欢
热门排行
精彩图文