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Title: Research Report on reaction and transfer regulation in lithium sulfur battery by Zhang Huigang unit: Nanjing University time: December 27, 2019 location: International Conference Center of Nanjing University
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Report summary
Lithium sulfur battery has a high specific energy, which is considered to be the best alternative to the existing lithium-ion battery secondary battery technology, and has become a hot field in the energy process. Reaction and transfer coupling exist in the process of charge and discharge of lithium sulfur battery. Mass transfer usually limits the reaction process and becomes the key control factor in the cycle process of lithium sulfur battery. By regulating the catalytic reaction and transfer process of the two, the performance of the battery can be optimized and improved. The important role of the transport process is illustrated by the regulation of the positive transport process and the growth of the negative metal lithium in li-s battery. The energy density of lithium sulfur battery is very high, but the sulfur in the positive electrode produces soluble polysulfide in the process of charging and discharging, which is easy to diffuse to the negative electrode, resulting in the reduction of efficiency. In this study, from the bionic process, a bipolar structure is designed to inhibit diffusion and improve the reaction catalytic process. Polysulfide is adsorbed by the polar material of the outer shell, and the polar structure of the inner shell is fixed to sulfur, so as to achieve the goal The cycle of high performance sulfur positive electrode is achieved. In the aspect of negative electrode lithium, this study proposes to regulate the nucleation process of lithium metal to induce the growth of lithium metal in a relatively safe way. Lithium metal is easy to form dendrites, especially at the interface of electrode diaphragm, which can cause short-circuit fire by piercing the diaphragm. In this study, the mechanism of controlling the preferential growth of dendrites at the diaphragm due to the reverse inhibition is proposed.
Personal profile
Zhang Huigang was engaged in postdoctoral research in the Department of materials science and engineering at the University of Illinois at Urbana Champaign in 2007. His research mainly focuses on "programmable materials research" and "Application of structured electrodes in lithium-ion rechargeable batteries". In 2012, he obtained commercial investment and became a high-tech start-up company (xerion advanced battery Corp.) based on his patented technology, and held the position of senior scientist in the company. He developed lithium-ion rechargeable batteries with high energy density and high power density. Dr. Zhang Huigang published many articles in Nature journal, nano letters and other journals, and applied for three patents in the United States and the world. In 2014, he joined the Department of energy science and engineering, School of modern engineering and Applied Sciences, Nanjing University, and his research direction is mainly chemical energy storage and solid electrochemistry. Meeting introduction
Title: the second National Conference on Energy Chemistry
Time: December 25, 2019 Venue: Nanjing organizer: Key Laboratory of Jieguan Ministry of chemical education, State Key Laboratory of coordination chemistry, School of chemical engineering, Nanjing University, Jiangsu chemical society, Jiangsu Vacuum Society
On December 25-28, 2019, the second National Conference on energy chemistry was held in the International Conference Center of Xianlin Campus of Nanjing University. Professor Hu Zheng, School of chemistry and chemical engineering of Nanjing University, Professor AIST of Japan and Professor Xu Qiang of Kyoto University served as co chairmen of the conference. The second National Conference on energy chemistry will focus on energy conversion and catalysis, energy storage and materials, MOFs and nano chemistry, carbon based energy materials, two-dimensional materials and other topics for in-depth exchanges, and set up the Elsevier energy Chem youth forum, Elsevier flat chem (2D) forum to focus on promoting the research process in the field of Energy Chemistry in China.
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