Projektbeschreibung
Die Batterieleistung und Energiedichte erhöhen
Die Entwicklung von wiederaufladbaren Batterien mit hoher Energiedichte ist entscheidend für die Bewältigung der energie- und umweltpolitischen Herausforderungen, die sich aus der steigenden Nachfrage nach tragbarer Elektronik, Elektrofahrzeugen und der Energiespeicherung im Netz ergeben. Der Fortschritt wird jedoch durch ein mangelndes Verständnis der Prozesse an den Elektroden-/Elektrolyt-Grenzflächen behindert, was zu Problemen wie einer kurzen Lebensdauer und Dendritenbildung führt. Der Engpass liegt in der ungelösten Grenzflächenchemie auf atomarer Ebene aufgrund unzureichender Analyseinstrumente. In diesem Zusammenhang werden über das ERC-finanzierte Projekt INTERACT die Atomsondentomographie und neuartige Tieftemperaturverfahren eingesetzt, um die Geheimnisse der Zwischenphasen von Festelektrolyten zu entschlüsseln und den Weg für fortgeschrittene Batterietechnologien zu ebnen.
Ziel
Developing high-energy-density rechargeable battery technologies is essential to solve energy and environmental problems. However, its development is currently impeded by a poor understanding of elementary processes occurring at electrode/electrolyte interfaces. Several long-standing issues such as short cycle life, low Coulombic efficiency and hazardous dendrite formation in batteries cannot be fundamentally solved due to the knowledge gap.
The bottleneck is that interfacial chemistry on the atomic-scale is as yet unresolved, owing to the lack of sufficiently suitable analytical capabilities. I will address this gap using atom probe tomography, coupled with a highly innovative cryogenic sample preparation and transfer platform, to provide atomic-scale insights into solid electrolyte interphase (SEI) formed at the electrode/electrolyte interface.
The key open questions to answer are: i) what is the composition and elemental distribution in a stable SEI? ii) how do ions in the electrolytes affect SEI formation? iii) how does stable SEI inhibit dendrite formation? My goal is to advance fundamental understanding of SEI formation, establish its structure-property relationships, and elucidate its interplay with other elementary processes occurring at electrode/electrolyte interfaces in a lithium metal battery model system.
I will i) reveal elemental distribution and compositional details of SEI in/under different electrolytes and working conditions; ii) unveil compositional evolution of SEI and the electrolytes during charging and discharging; and iii) interrogate their roles in dendrite formation in a half and full battery cell, respectively. These unique data will shed atomistic insights into how to tailor SEI and electrode/electrolyte interfaces to mitigate long-standing issues. Furthermore, the novel cryogenic platform is not system-specific and will be applicable for studying other liquid- or solid-state-electrolyte battery technologies.
Wissenschaftliches Gebiet
Schlüsselbegriffe
Programm/Programme
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Thema/Themen
Finanzierungsplan
HORIZON-ERC - HORIZON ERC GrantsGastgebende Einrichtung
44801 Bochum
Deutschland