1. Thin-Film Solid State Lithium-Ion Batteries of the LiCoC2/LiPON/Si@O@Al System
- Author
-
V. V. Naumov, Alexander Rudy, Alexander M. Skundin, Yu. S. Tortseva, A. A. Mironenko, and I. S. Fedorov
- Subjects
Materials science ,chemistry.chemical_element ,Electrolyte ,Condensed Matter Physics ,Electrochemistry ,Electronic, Optical and Magnetic Materials ,Ion ,chemistry ,Electrode ,Materials Chemistry ,Lithium ,Electrical and Electronic Engineering ,Composite material ,Diffusion (business) ,Thin film ,Voltage - 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.
- Published
- 2021