Grading institution: Universitat Duisburg-Essen – GERMANY / Recruiting organisation: Forschungszentrum Jülich – GERMANY / Hosting: Institute of Energy and Climate Research – GERMANY / Cofounding organisation: Forschungzentrum Jülich GmbH / Secondment foreseen:TU Delft & Univ. Twente - THE NETHERLANDS / PhD Supervisor: Dina Fattakhova-Rohlfing
Proposed PhD research project will be devoted to investigating the processes on the interface of solid cathode materials and solid electrolytes in solid state cells, with a special focus on understanding the degradations mechanisms in solid-state ceramic cathodes.
The project will deal with two important classes of oxide and phosphate-based ceramic electrolytes, such as Li7La3Zr2O12 (LLZO) and LiAlxTi2-x(PO4)3 (LATP), and respective oxide- and phosphate-based cathode active materials. Expected contributions to the solid electrolyte/cathode impedance such as slow kinetics of charge transfer across the electrolyte/cathode interface; the formation of high impedance reaction phases during processing; the electrochemical degradation of electrode components during operation and/or the mechanical degradation of the electrode due to the bias-induced volume changes will be investigated on the planar model electrode systems as well as on 3D-cathode structures with different morphologies. PhD project will be conducted mainly in JÜLICH. The research tasks will involve fabrication of ceramic planar and 3D-cathode structures with varying microstructure and density, their electrochemical characterization and physico-chemical characterization of their bulk, interfacial and microstructure properties for different fabrication and electrochemical operation conditions.
This research will be supported by theoretical calculations on the atomic and system levels performed in JÜLICH and TU Delft. During 6 months, PhD student will work in Twente on fabrication of model planar electrodes with the defined interfaces, followed by structural analysis of local atomic ordering at the interfaces. In-depth investigation of structure, chemical composition and generic electrochemical properties of solid cathode/electrolyte interfaces in planar electrodes will be performed during additional 6-9 months stay in TU Delft using several neutron analytical tools, such as neutron depth analysis and neutron reflectommetry (Li-distribution and transport), neutron diffraction (structure), solid state NMR (local chemical environment and Li-ion mobility) but also positron annihilation (defects) and operando atomic force/scanning electrochemical microscopy coupled to an electrochemical impecance spectrometer (local electrochemistry).
This topic is part of the European project DESTINY, Doctorate programme on Emerging battery Storage Technologies INspiring Young scientists, which aims at creating a new paradigm change in battery research. Coordinated by the CNRS, with 40 European partner institutions working on future batteries and related issues on energy storage, DESTINY has the ambition to participate in the long-term research initiative Battery 2030+. DESTINY consists in delivering a competitive edge to European industry and academy within the rapidly emerging green technology areas of Electro-mobility and Large-scale energy storage.
In this context, DESTINY PhD Programme opens a first application call enrolling 29 doctoral positions, located in 11 European countries, and will start on October 2021 (Destiny website > Cohort#1 > overview).
A detailed « Guide for Applicants » (Destiny website > apply > application documents) has been compiled for you, that we recommend you to read carefully before applying.
WARNING: For your application, please download the Word Template file called “Application FORM Global Document” (Destiny website > apply > application documents) on the DESTINY website. You fill it as a SINGLE PDF file before submitting it on the CNRS Job offer (Destiny website > Apply > Where to apply?). For technical reasons, please upload twice your fully completed form at “Attach a new CV” and “Covering letter”. If your file exceeds 3Mb, see the Instruction guide at (Destiny website > Apply > Where to apply?)
Funding category: Financement de l'Union européenne
PHD Country: France
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