Wolff Beatrice, Hellenbrandt Christian, Jakes Peter, Eichel Rüdiger-A, Granwehr Josef, Hausen Florian
Forschungszentrum Jülich GmbH, Institute of Energy Technologies, IET-1, 52425, Jülich, Germany.
RWTH Aachen University, Institute of Physical Chemistry, 52074, Aachen, Germany.
Chemphyschem. 2025 Mar 15;26(6):e202400937. doi: 10.1002/cphc.202400937. Epub 2025 Jan 24.
Anode free concepts are gaining traction in battery research. To improve cyclability, a better understanding of the deposition processes and morphologies is necessary. Correlative experiments enable a link between a variety of properties obtained, such as chemical, mechanical or electrochemical data. Here, electron paramagnetic resonance imaging (EPRI) is correlated with atomic force microscopy (AFM) to gain a deeper understanding of the microscopic topography and local stiffness at different intensities of the lithium selective EPRI map. Experiments were carried out on a sample of lithium deposited on copper foil from standard battery electrolyte. The correlation of both methods reveals that EPRI has a high sensitivity towards small lithium structures, while bulk lithium was not detected. The results demonstrate that EPRI can be used for prescreening to identify regions with different properties, which can then be analysed individually by AFM.
无阳极概念在电池研究中越来越受到关注。为了提高循环性能，有必要更好地理解沉积过程和形态。相关实验能够将所获得的各种性质联系起来，如化学、机械或电化学数据。在此，电子顺磁共振成像（EPRI）与原子力显微镜（AFM）相关联，以更深入地了解锂选择性EPRI图不同强度下的微观形貌和局部刚度。实验是在从标准电池电解质沉积在铜箔上的锂样品上进行的。两种方法的相关性表明，EPRI对小锂结构具有高灵敏度，而未检测到块状锂。结果表明，EPRI可用于预筛选以识别具有不同性质的区域，然后可通过AFM对这些区域进行单独分析。
