6Li/7Li isotopic contrast to image lithium gradients in high energy cathode cycled vs. Li metal cell using a standardised operando cell
Standards, protocols and electrochemical reliability are key parameters for operando type measurements in batteries, as the electrochemical response obtained in an operando cell is often far away from the one obtained in standard coin cell, potentially biasing the acquired knowledge. Here, we developed a special electrochemical cell for neutron and synchrotron operando imaging experiments, to demonstrate that standards and protocols can be obtained using a proper cell design. We would like to test this new electrochemical cell with known challenging high-energy material (LiNi0.8Mn0.1Co0.1O2 cathode vs. Li metal in organic based electrolyte) at D50/NeXT at ILL and, in parallel, at the ID31 beamline at ESRF. Our goal is to obtain a deep understanding of lithium gradients developed across the electrodes and electrolyte (specifically using Li isotopic contrast by neutron imaging), as well as microstructure changes during electrochemical cycling by combining X-ray and neutron techniques. The validation/optimization of neutron/x-rays standardized cell and correlated data analysis is a major target in battery research (BIGMAP European project, Batteries 2030+).
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LYONNARD Sandrine; HELFEN Lukas; Quentin Jacquet; ROBBA Alice and VILLEVIEILLE Claire. (2021). 6Li/7Li isotopic contrast to image lithium gradients in high energy cathode cycled vs. Li metal cell using a standardised operando cell. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-05-59
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