【直播】【X-talk, line to materials】（第五期）

X-talk, line to materials是电子科技大学材料与能源学院全力打造的国际学术交流平台，旨在围绕材料化学领域重大科学问题和颠覆性创新技术革新开展主题交流，线上开展，邀请全球学者共同参与。

液流电池和锂电池是重要的能量存储器件。电池的有效利用是实现双碳目标的重要途径。那如何提升电池的能量转化效率、制备高安全、高比能量电池呢？让我们来听听新加坡国立大学的王庆教授团队和西班牙CIC Energigune的李春梅博士是怎么做的吧！

直播信息

报告题目

报告一：Electrochemical Energy Storage and Conversion beyond the Electrode-electrolyte Interface

报告二：Polymer-based solid-state Li-S cell development

报告人（单位）

王庆 教授（新加坡国立大学）

李春梅 博士（CIC Energigune）

报告时间

2022年4月7日（周四）15:00

主办方

电子科技大学材料与能源学院

直播二维码

报告人一

报告时间

2022年4月7日 15:00-16:00

报告题目

Electrochemical Energy Storage and Conversion beyond the Electrode-electrolyte Interface

报告人介绍

Dr. Qing Wang is an Associate Professor at the Department of Materials Science and Engineering, National University of Singapore. He obtained his PhD in Physics at Institute of Physics, Chinese Academy of Sciences in 2002. Before he moved to Singapore, he had worked as a postdoc research fellow at École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, and National Renewable Energy Laboratory (NREL), USA, in the area of mesoscopic photoelectrochemical cells. His research interest is “Charge Transport in Mesoscopic Energy Conversion and Storage Systems”. Currently his group is extensively working on a new research platform — redox-mediated energy storage and conversion, with the implementation of the redox-targeting concept to a wide variety of battery chemistries and energy materials for advanced energy related applications.

报告摘要

Redox reaction involving charge transfer at the electrode-electrolyte interface represents an essential process for various electrochemical energy conversion and storage applications, such as fuel cells, electrolyzers and batteries, etc. As a result, the operation (i.e., cell voltage, current density, number of charges, etc.) of the above devices is inherently dictated and constrained by the redox reactions at the electrode-electrolyte interface.

The redox-mediated process — a chemical reaction between an electrolyte-borne redox species electrochemically generated on electrode and a material (generally insoluble in electrolyte) away from the electrode, provides additional flexibility in circumventing the constraints intrinsically confronted by the conventional electrochemical devices. One example is the redox targeting of energy storage materials for flow batteries. The redox-mediated reactions of high-capacity solid material stored in the tank with redox electrolyte flowing through it considerably boost the energy density of redox-flow battery without compromising its salient features of operation flexibility and scalability. Another example is the redox-mediated water electrolysis for spatially decoupled hydrogen production. The electrochemical-chemical cycle enables continuous reaction between an electrolyte-borne redox mediator and an HER or OER catalyst loaded in a fixed-bed reactor spatially separated from the cell, which is believed to be advantageous to enhanced safety and on-demand hydrogen production. So, with the assistance of redox mediators shuttling between the electrode compartment and reactor tank, the border of the conventional electrochemical reaction is spatially extended beyond the electrode compartment, which endows system with intriguing features for various innovative applications.

In this talk, I will report the latest advancement in the above areas. In addition, I will briefly introduce some other studies on redox-mediated reactions, such as low-grade waste heat harnessing based on a thermal-electrochemical cycle and battery material recycling based on a one-way redox-targeting reaction, etc.

报告人二

报告时间2022年4月7日 16:00-17:00报告题目
Polymer-based solid-state Li-S cell development报告人介绍Dr Chunmei Li obtained European joint Ph. D on Material Science in 2014. The Ph. D thesis was carried out between University of St Andrews (UK) with Prof. Peter G. Bruce and Université de Picardie Jules Verne (France) with Prof. Jean-Marie Tarascon. The research was related to the fundamental studies of non-aqueous Li-O2 batteries, mainly the mechanism of O2 reduction in aprotic solvents. Prior her Ph.D degree, she studied European Master of Material Science, Materials for Energy Storage and Conversion (Erasmus Mundus Programme, 2008-2010). As part of the Master programme, she studied in Aix-Marseille Université (France), Warsaw University of Technology (Poland) and Universidad de Cordoba (Spain) before spent 7 months in University of Uppsala (Sweden) for her Master thesis on nanomaterials for photocatalyst. She joined CIC energiGUNE in 2014 as post-doc researcher in Li-S research line working on processing and optimization of Li-S batteries, and has become research line leader since 2018. Her research interests focus on low-cost, sustainable and safe solid-state Li-S cells.报告摘要Speaking to State-of-Art Li-S batteries with liquid electrolyte, ´´next generation´´ solid-state Li-S cells have attracted great attention, especially for the past 5 years. More than the safety advantages of solid-state Li-S cells, estimations have demonstrated possible high gravimetric energy density compared to liquid systems. This talk will summarize the development of solid-state Li-S cells in CIC energiGUNE, including i) studies of PEO-based all-solid-state cells operating at 70 oC which focus on Li/electrolyte interfaces, i.e., SEI formation on Li anode, by tailoring Li salts and additive, and ii) PVDF-based quasi-solid-state cells operating at room temperature which balanced the safety and performance of the cell. Furthermore, upscaling from coincell to pouch cell format of such systems will be presented.

电子科技大学材料与能源学院

学院师资力量雄厚，拥有一支毕业于哈佛大学、牛津大学、剑桥大学、加州大学等世界知名大学的学者领衔的国际化师资队伍，其中教授28人，研究员4人，副教授、副研究员和高级工程师40人。学院汇聚了一批国家级、省部级杰出人才共计22人，占专任教师比例超过32%。

学院拥有材料科学与工程和化学工程与技术两个一级学科，均有20年以上悠久的办学历史和良好的成果积累，特色鲜明，优势突出。近几年瞄准国际前沿与电子信息产业重大需求，基础研究与应用研究并举，材料和化学两个学科都已进入国际ESI全球排名前1%，并取得国家科技进步二等奖、省部级科技进步一等奖等多项代表性业绩。

学院现有新能源材料与器件、应用化学和材料科学与工程三个本科专业，拥有国家电子材料与器件实验教学示范中心和新能源与智能电网省级教学示范中心，其中新能源材料与器件专业入选国家级特色专业和四川省“卓越工程师教育培养计划”，应用化学专业入选教育部“卓越工程师教育培养计划”。近三年学院获得国家教学成果二等奖1项，省级教学成果一等奖1项，省级教学成果三等奖1项，为国家培养一批优秀的材料、化学、新能源行业领军人才。

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编辑：王茹茹

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