Electrolytic liquefaction: Committed to solving the problem of lithium dendrite growth
Time:2020-11-16        Views:784

Title:Electrolytic liquefaction: Committed to solving the problem of lithium dendrite growth

Speaker:Ma Jianmin, Hunan University

Time:2020.11.16 (Monday) 15: 30 PM

Venue:Conference Room 102, Building B5, University Town Campus, South China University of Technology 

Welcome faculty memebers and students to attend! 

Biography:

Dr. Ma Jianmin, associate professor, Doctoral supervisor of School of Physics & Electronics of Hunan University. He is the recipient of the Yuelu Scholars program of Hunan and the Hunan National Science Fund for Distinguished Professors. He is also the Secretary-General of the Chinese Society of Particuology, the associate editor of Rare Metals, and the editorial board of journals such as Journal of Energy Chemistry, Nano-Micro Letters, Chinese Chemical Letters, Journal of Physics: Condensed Matter and so on. His research interests include theoretical calculations, electrolytes, new batteries, etc. He has published many papers in domestic and international journals with an H index of 60. 

Abstract

With the rapid increase of energy storage demand, the design of high energy density energy storage device is particularly urgent. With a negative reduction potential (E=-3.04V vs. RHE) and a super high theoretical specific capacity (3860 mA H g-1), lithium metal is considered to be the most promising lithium-ion battery material, with a capacity 10 times that of conventional lithium-ion batteries. However, due to the characteristic of lithium ion batteries, the commercialization of lithium metal lithium is hindered by its poor cycle life, volume change and dendrite growth, which lead to serious safety problems. During repeated charge and discharge, the formation of lithium dendrites will increase the internal resistance, and even puncture the diaphragm, resulting in overheating or short circuit of the battery, leading to the low battery life and even battery explosion. In addition, lithium dendrite will aggravate the side reaction between the electrolyte and lithium metal, leading to continuous consumption of electrolyte and lithium. Such consumption leads to high overpotential, fast capacity attenuation and low coulomb efficiency. Therefore, the development of efficient and safe metal batteries still needs a huge effort. The functionalization of the electrolyte provides great space for this purpose. This report will take electrolyte additive as an example to explain how to solve the problem of lithium dendrite growth.