Na electrodeposits: a new decaying mechanism for all-solid-state Na batteries revealed by synchrotron X-ray tomography. (April 2021)

• Record Type: Journal Article
• Authors: Sun, Fu; Duchêne, Léo; Osenberg, Markus; Risse, Sebastian; Yang, Chao; Chen, Libao; Chen, Nan; Huang, Yongxin; Hilger, André; Dong, Kang; Arlt, Tobias; Battaglia, Corsin; Remhof, Arndt; Manke, Ingo; Chen, Renjie
• Is Part Of: Nano energy. Volume 82(2021)
• Publication Date: 2021-04
• Subjects: Solid state battery -- Solid state Na battery -- Closo-borate solid electrolyte -- Synchrotron X-ray tomography -- Degradation mechanism; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2021.105762
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: From non-destructive and cross-sectional visualization by synchrotron X-ray tomography, we suggest a novel capacity decaying mechanism of all-solid-state Na batteries built with closo-borate electrolytes caused by electrochemically generated inactive Na electrodeposits. Graphical Abstract: ga1 Highlights: Na all-solid-state batteries (Na ASSBs) were built with the closo-borate solid electrolyte. Noninvasive synchrotron X-ray tomography technique was used to study the decaying mechanisms of the cycled Na ASSBs. Markov process model was employed to describe the physicochemical meaning of the observed capacity decay. A new decaying mechanism of the Na ASSBs caused by the continuous accumulation of Na electrodeposits was proposed.