报告题目：Ionic conducting cellulose membranes in batteries

　　报告时间：2024年10月10日14:30-17:30

　　报告地点：造纸D楼306会议室

　　报告人：Reverant Crispin教授

　　邀请人：彭新文教授

　　主办单位：华南理工大学制浆造纸工程国家重点实验室、轻工科学与工程学院

　　报告内容：

　　1、瑞典高等教育介绍。

　　2、本科、研究生在林雪平大学学习与生活介绍。

　　3、科研讲座：Ionic conducting cellulose membranes in batteries。

　　4、师生交流互动。

　　报告摘要：

　　This work discusses the development of green ion-selective membranes based on chemically modified cellulose nanomaterials. Specifically, we focus on using cellulose nanofibrils (CNFs), derived from bleached softwood fibers, to create membranes with enhanced properties by introducing sulfonate groups [1]. The tight cross-linking of the membrane limits the membrane's water uptake and swelling, while the density of sulfonate groups enhances the ionic conductivity, making them potential alternatives to expensive fluoropolymer membranes like Nafion, often used in electrochemical energy devices. For instance, when these sulfonated cellulose membranes are used in a model aqueous organic redox flow battery, they showed superior cycling performance compared to Nafion 115 due to reduced crossover of redox-active species [2,3]. Moreover, the membranes were tested as separators in zinc-ion hybrid capacitors, achieving long operational stability and high coulombic efficiency [4]. These results suggest that sulfonated cellulose membranes offer a sustainable, efficient alternative to traditional membranes in energy storage applications.

　　References: [1] Adv. Sustainable Syst. 2200275 (2022); [2] Adv. Energy Sustainability Res. 2200016 (2022); [3] Journal of Energy Storage 83, 110338 (2024); [4] EcoEnergy 2, 456 (2024).

　　报告人简介：

　　Reverant Crispin obtained his PhD in 2000 with Prof. J.L. Brédas at University of Mons, Belgium, in quantum chemical modelling of the interaction of organic molecules on transition metal surfaces. In 2004, Reverant joined the Laboratory of Organic Electronics headed by Prof. M. Berggren and developed activities on organic electronic devices (organic diodes, transistors, memories). For his development on thermoelectric polymers, he was awarded the Tage Erlander Prize (2012) and the Göran Gustafsson prize (2016) from the Royal Swedish Academy of Sciences. Since 2014, he is a Professor (Linköping University, Sweden) and leads research activities on organic energy materials. He became vice-director of the national program Advanced Functional Materials at Linköping University in 2019. He is cofounder and scientific advisor of 3 start-up companies: Ligna Energy AB (2017) developing organic batteries, ParsNord (2020) developing flexible thermoelectric coolers, and Cellfion AB (2021) producing ion-selective cellulose membranes for H2-electrolysers and redox flow batteries. He is also advisory board member for the following journals: “Advanced Energy and Sustainability Research” (2020) and Nano Research Energy (2021).