Chemical Engineering, Gebze Technical University, Kocaeli, Turkey

报告摘要：

To meet the ever-increasing demand requirements, studies have long focused on sulfur-based batteries due to their high theoretical metrics at low cost. However, their practical application remains ambiguous due to several key challenges such as the large volume expansion of sulfur, the sluggish kinetics of metal polysulfides, and the poor electronic and ionic conductivity of sulfur and final discharge products. These challenges result in irreversible sulfur loss, poor cycle life and uncontrollable passivation of the discharge product on the metal surface.

Beyond sulfur, selenium-based batteries have attracted considerable interest for advanced battery systems and significant progress has been made in the design of state-of-the-art Na-Se batteries in recent years. Although selenium provides higher volumetric capacity and electronic conductivity than sulfur, these battery systems still face some significant obstacles, including severe volume changes during the discharge-discharge process and uncontrollable accumulation of sodium selenide (Na₂Se). We address these issues primarily building on the knowledge learned in Li-S batteries and in this context we focus on one of the main problems in capacity losses, namely the re-oxidation of end-discharge products.

The talk will start with the progress made in Li-S batteries and focus on the development of RT Na-S and Na-Se batteries respectively. Various electrocatalysts will be introduced to efficiently catalyze Na₂Se conversion and improve the utilization of active materials. Furthermore, the development of aqueous-based bio-binder will also be discussed during the presentation

报告人简介：

Rezan Demir-Cakan received her PhD from the Max Planck Institute for Colloids and Interfaces (2009). She then worked as a postdoc researcher in Jean-Marie-Tarascon's group from 2009 to 2012, focusing on rechargeable lithium batteries, more specifically lithium-sulfur batteries. She is currently working as a Professor at the Department of Chemical Engineering, Gebze Technical University (Kocaeli/Turkey). Her current research focuses on the synthesis of nanostructured energy materials and their applications in the field of Na-ion, Li-S and aqueous electrolyte Zn-ion batteries. She has received several awards such as French Embassy Fellowship (2023, 2018), Turkish Academy of Sciences Distinguished Young Scientist Award (2018), L'Oreal Turkey Young Women in Science (2016), Science Academy Young Scientist Award (2015), IMLB Young Researcher Award (2012) and Japan Carbon Award (2008). She has been funded by numerous national and international research projects and has co-authored more than 80 papers in international peer-reviewed journals (total citations: >5800, h-index: 31). Since 2014 she has been working as an expert on energy related calls in EU funded projects (H2020, HE) and is the coordinator of the EU project with the acronym TwinBat.

联系人：陆雅翔（82649845，yxlu@iphy.ac.cn）

本次活动由中科院青促会物理所小组主办