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Lithium Voids Precede Dendrite Growth in Solid State Lithium Metal Batteries by Prof. Naga Phani Aetukuri
Wed, 2024-10-23 21:03 — venkatr
Location and Date:
July 12, 2023 (Wednesday), 2.30 PM, DESE seminar Room, 2nd Floor
Solid-state lithium metal batteries (SSLMBs) that utilize metallic lithium as an anode offer high energy density and potentially long cycle and calendar life. However, stable plating and stripping of lithium in cells employing inorganic solid electrolytes, especially at current densities >0.2 mA/cm2, has been a challenge. In this talk, we will discuss the origins of dendrite growth in SSLMBs employing inorganic solid-state electrolytes. We show that there is a strong correlation between the onset of dendrite growth and the observation of lithium voids at the interface with the solid electrolyte. We discuss the properties of interlayers and propose descriptors for identifying interlayers that could further increase the current densities for cycling lithium without the undue necessity for high stack pressure.
References:
1. Raj, V., Venturi, V., Kankanallu, V. R., Kuiri, B., Viswanthan, V., Direct correlation between void formation and lithium dendrite growth in solid-state electrolytes with interlayers Nature Mater. 21, 1050–1056 (2022). [also see research highlight in Nature Reviews Materials: https://www.nature.com/
2. Raj, V., Aetukuri, N. B., Nanda J. Solid State Lithium Metal Batteries – Issues and Challenges at the Lithium-Solid Electrolyte Interface. Curr. Opin. Solid State Mater. Sci. 6 100999 (2022).
Bio
Naga Phani Aetukuri is an Assistant Professor in the Solid State and Structural Chemistry Unit at the Indian Institute of Science, Bengaluru. He received his doctoral degree from Stanford University in 2013 and was a post-doctoral researcher at IBM Almaden Research Center. His group’s research is in the areas of electrochemical energy storage materials and devices and thin film based electrochemical devices including organic electrochemical transistors.