Electrochemistry and Materials Design for Rechargeable Lithium-Metal Batteries 

Yu-Guo Guo

Institute of Chemistry, Chinese Academy of Sciences

Abstract: Rechargeable Li-metal batteries have become attractive candidates for the next-generation electrochemical energy storage systems with high energy densities. Here, we report our recent progress in Li-S and solid-state Li-metal batteries (SSLMBs). In contrast to the extensive studies of the electrochemical behavior of conventional cyclic S8 molecules in Li-S batteries, we will focus on the electrochemistry of S chains. In addition, rational design of S-C composite cathodes with high sulfur loading and remarkable electrochemical properties will also be reported. Regarding to the uneven Li deposition, unstable solid electrolyte interphase formation, and infinite change of relative dimensions of the Li metal anodes, 3D current collectors (e.g., 3D Cu), nanostructured carbon materials (e.g., carbon spheres, solid or hollow carbon fibers), artificial solid electrolyte interphase (SEI) layers (e.g., Li3PO4, Al-containing SEI), functional electrolyte additives (e.g., Al-based colloidal particles, ionic liquids), as well as bifunctional solid polymer electrolytes and ionic conductor-coated thin film electrolytes with both high Li ion conductivity and high mechanical strength have been demonstrated feasible as functional materials for stable plating of Li to address the above issues. We hope that our perspectives can shed lights on the reasonable design of key-enabling materials for Li-S and SSLMBs, and contribute to a helpful discussion for the technology beyond classical Li-ion batteries.

Biography: Prof. Guo received his PhD in Physical Chemistry from the Institute of Chemistry, CAS (ICCAS) in 2004. He worked at the Max Planck Institute for Solid State Research at Stuttgart (Germany), first as a Guest Scientist and then as a Staff Scientist from 2004 to 2007. He joined ICCAS as a full Professor in 2007. He serves as an Associate Editor of ACS Applied Materials & Interfaces since 2015. His research interests focus on energy materials and electrochemical energy storage with batteries. He has authored or co-authored more than 200 peer-reviewed papers with more than 18000 citation times, and he currently has an H-factor of 67. He has filed 12 PCT patents and 62 China patents in the field of energy materials and batteries, in which 28 patents have been granted and 3 patents have been transferred to companies. He has received several awards including the International Society of Electrochemistry Tajima Prize (2014), the 13th National Award for Youth in Science and Technology (2013), the Distinguished Young Chemist Award 2013 in Physical Chemistry of the Federation of Asian Chemical Societies (FACS), and the MIT Technology Review’s TR35 Award (2011). He was three times named amongst "Thomson Reuters Highly Cited Researchers" in the field of Materials Science (2014-2016).