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High performance next-generation Li-ion batteries using functional polymers

Jeudi 19 décembre 2019 à 14:00
Salle de séminaire C5-421-A du CEA-Grenoble
Publié le 19 décembre 2019

​Par le Professeur Youngkwan Lee
Advanced Polymeric Material Lab, School of Chemical Engineering
SungKyunKwan University (SKKU)
Republic of Korea

For the next-generation Li-ion batteries, there is an urgent need to develop energy systems with higher energy density and longer cycle life. Si-anode and S-cathode of Li-ion batteries have attracted growing attention in recent years due to their high energy density that can meet the requirement for large-scale power system. Si anode suffer from significant intrinsic volume change (>300 %) during charging and discharging, while S cathode from low sulfur utilization and poor rechargeability in the form of soluble reaction intermediates of polysulfides (Li2S2 Li2S, etc.). In order to achieve high performance, it is crucial to control the electrode system to attain stable structure and facile charge transport. Polymer binders can support to link active materials together and to adhere to the current collector. A multi-functional binder composed of chitosan and natural rubber is applied to Si anode. The chitosan binder is also useful for the S cathode. Chitosan-rGO binder is prepared for S cathode. The structure and electrochemical performance of the Si anode or S cathode during the charging/discharging have been fully investigated. 

The CEA-Grenoble site is a regulated access/restricted area. The access to the Blg C5/Room 421A is conditioned to a CEA badge request to be made NO LATER THAN Wednesday, Dec. 11, 2019 at 3:00 pm. Please contact Patrice Rannou  and send an electronic version of your passport/ID. Please do note that a valid ID (National ID card or passport only) will be required to collect your badge at the main entrance (Blg A2) of CEA- Grenoble (17 Avenue des martyrs, 38054 Grenoble Cedex 9). Last but not the least, do take into account that Blg C5 is located at a walking distance of ca. 10 min from the Blg A2 where you will collect your badge. Collecting your badge ca. 15-30 minutes before the start of the invited seminar is recommended.