Funktionella molekyler och polymerer för hög-energetiska batterikatoder
Tidsperiod: 2017-01-01 till 2020-12-31
Projektledare: Erik Jämstorp Berg
Bidragstyp: Bidrag för anställning eller stipendier
Budget: 3 060 000 SEK
Li-based batteries outperform all other rechargeable technologies in terms of energy density, but the limited efficiency and life-time of next-generation battery materials impede their further implementation. Battery materials should in principle operate reversibly for thousands of charge cycles. In practice, irreversible side-reactions rapidly reduce the battery efficiency and capacity. Several functional molecular and polymeric compounds are known to stabilize and facilitate the electrochemical processes and are today standard additives in modern batteries. Yet, the underlying mechanisms remain poorly understood.The research program aims to study, describe and exploit the multifaceted role of functional compounds to (1) stabilize high-voltage Li-ion cathode interfaces, (2) mediate Li–gas anionic redox chemistries, and (3) provide charge-storage electrodes for environmentally friendly Li–organic batteries. The methodological approach relies on operando characterization, as most electrochemical processes are solely observable in the operating device. I will establish an experimental platform combining non-linear electrochemical techniques, electrochemical mass-spectrometry and surface-enhanced vibrational spectroscopy, which all are particularly dedicated to study the processes behind these functional compounds. The mechanistic insights will guide the design, development and implementation of future high-energy rechargeable batteries with high efficiency and long life-time.