Effect of pulse-current-based protocols on the lithium dendrite formation and evolution in all-solid-state batteries
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In: Nature Communications, Vol. 14.2023, 2432, 27.04.2023.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Effect of pulse-current-based protocols on the lithium dendrite formation and evolution in all-solid-state batteries
AU - Reisecker, Volker
AU - Flatscher, Florian
AU - Porz, Lukas
AU - Fincher, C.
AU - Todt, Juraj
AU - Hanghofer, I.
AU - Hennige, V.
AU - Linares-Moreau, M.
AU - Falcaro, P.
AU - Ganschow, Steffen
AU - Wenner, Sigurd
AU - Chiang, Y. M.
AU - Keckes, Jozef
AU - Fleig, Jürgen
AU - Rettenwander, Daniel
N1 - Publisher Copyright: © 2023, The Author(s).
PY - 2023/4/27
Y1 - 2023/4/27
N2 - Understanding the cause of lithium dendrites formation and propagation is essential for developing practical all-solid-state batteries. Li dendrites are associated with mechanical stress accumulation and can cause cell failure at current densities below the threshold suggested by industry research (i.e., >5 mA/cm2). Here, we apply a MHz-pulse-current protocol to circumvent low-current cell failure for developing all-solid-state Li metal cells operating up to a current density of 6.5 mA/cm2. Additionally, we propose a mechanistic analysis of the experimental results to prove that lithium activity near solid-state electrolyte defect tips is critical for reliable cell cycling. It is demonstrated that when lithium is geometrically constrained and local current plating rates exceed the exchange current density, the electrolyte region close to the defect releases the accumulated elastic energy favouring fracturing. As the build-up of this critical activity requires a certain period, applying current pulses of shorter duration can thus improve the cycling performance of all-solid-solid-state lithium batteries.
AB - Understanding the cause of lithium dendrites formation and propagation is essential for developing practical all-solid-state batteries. Li dendrites are associated with mechanical stress accumulation and can cause cell failure at current densities below the threshold suggested by industry research (i.e., >5 mA/cm2). Here, we apply a MHz-pulse-current protocol to circumvent low-current cell failure for developing all-solid-state Li metal cells operating up to a current density of 6.5 mA/cm2. Additionally, we propose a mechanistic analysis of the experimental results to prove that lithium activity near solid-state electrolyte defect tips is critical for reliable cell cycling. It is demonstrated that when lithium is geometrically constrained and local current plating rates exceed the exchange current density, the electrolyte region close to the defect releases the accumulated elastic energy favouring fracturing. As the build-up of this critical activity requires a certain period, applying current pulses of shorter duration can thus improve the cycling performance of all-solid-solid-state lithium batteries.
UR - http://www.scopus.com/inward/record.url?scp=85158031795&partnerID=8YFLogxK
U2 - 10.1038/s41467-023-37476-y
DO - 10.1038/s41467-023-37476-y
M3 - Article
C2 - 37105952
AN - SCOPUS:85158031795
VL - 14.2023
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 2432
ER -
