Abstract
Experimental samples of solid-state thin-film lithium-ion batteries (STLIBs) of the LiCoO2/LiPON/Si@O@Al electrochemical system are manufactured using traditional mask technology by radio frequency magnetron sputtering of both the electrodes and electrolyte. The obtained samples have a specific capacity corresponding to the modern published data on industrial STLIB samples. The developed STLIB samples are capable of long (about 1000 cycles) cycling with an acceptable loss of capacity, provided that the charging voltage is limited to 3.7 V. Exceeding the charging voltage leads to an increase in the charging capacity, but to a noticeable acceleration of degradation during cycling. At cycling currents over 20 μA/cm2, the inverse proportionality between the current and the discharge capacity is observed, which is determined by the delayed solid-phase diffusion of lithium. With a decrease in the cycling current, the discharge capacity approaches the theoretical capacity.
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Funding
This study was supported by the Ministry of Science and Higher Education of the Russian Federation as part of state assignment no. 0856-2020-0006 of Demidov Yaroslavl State University using the equipment of the Center for Collective Use “Diagnostics of micro- and nanostructures.”
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Rudy, A.S., Mironenko, A.A., Naumov, V.V. et al. Thin-Film Solid State Lithium-Ion Batteries of the LiCoC2/LiPON/Si@O@Al System. Russ Microelectron 50, 333–338 (2021). https://doi.org/10.1134/S106373972105005X
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DOI: https://doi.org/10.1134/S106373972105005X