Print Email Facebook Twitter High dielectric filler for all-solid-state lithium metal battery Title High dielectric filler for all-solid-state lithium metal battery Author Wang, C. (TU Delft RST/Storage of Electrochemical Energy; The Hong Kong Polytechnic University) Liu, M. (TU Delft RST/Storage of Electrochemical Energy) Bannenberg, L.J. (TU Delft RID/TS/Instrumenten groep) Zhao, C. (TU Delft RST/Storage of Electrochemical Energy) Thijs, M.A. (TU Delft RID/TS/Technici Pool) Boshuizen, B. (TU Delft ChemE/O&O groep) Ganapathy, S. (TU Delft RID/TS/Instrumenten groep) Wagemaker, M. (TU Delft RST/Storage of Electrochemical Energy) Date 2024 Abstract Lithium metal with its high theoretical capacity and low negative potential is considered one of the most important candidates to raise the energy density of all-solid-state batteries. However, lithium filament growth and its induced solid electrolyte decomposition pose severe challenges to realize a long cycle life. Here, dendrite growth in solid-state Li metal batteries is alleviated by introducing a high dielectric material, barium titanate, as a filler that removes the electric field gradients that catalyze dendrite formation. In symmetrical Li-metal cells, this results in a very small over-potential of only 48 mV at a relatively high current density of 1 mA cm−2, when cycling a capacity of 2 mA h cm−2 during 1700 h. The high dielectric filler improves the Coulombic efficiency and cycle life of full cells and suppresses electrolyte decomposition as indicated by solid-state nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) measurements. This indicates that the high dielectric filler can suppress dendrite formation, thereby reducing solid electrolyte decomposition reactions, resulting in the observed low overpotentials and improved cycling efficiency. Subject All-solid-state batteriesDendrite-freeElectrolyte decompositionHigh dielectric fillerLi-metal anode To reference this document use: http://resolver.tudelft.nl/uuid:65ffe8a9-4bed-47d4-a021-9e1d85f3c564 DOI https://doi.org/10.1016/j.jpowsour.2023.233768 ISSN 0378-7753 Source Journal of Power Sources, 589 Part of collection Institutional Repository Document type journal article Rights © 2024 C. Wang, M. Liu, L.J. Bannenberg, C. Zhao, M.A. Thijs, B. Boshuizen, S. Ganapathy, M. Wagemaker Files PDF 1_s2.0_S0378775323011448_main_1.pdf 10.91 MB Close viewer /islandora/object/uuid:65ffe8a9-4bed-47d4-a021-9e1d85f3c564/datastream/OBJ/view