Abstract
The utility of the high-temperature superconductor, YBa 2Cu 3O 7-itx, as the cathode material for an all-solid-state lithium cell has been examined. The capacity of YBa 2Cu 3O 7- x, is 223 mA h g −1 and the discharge efficiency is > 92%. Measurements of a.c. impedance show that the charge-transfer resistance at the interface of the electrolyte/cathode is very low and increases with the depth-of-discharge of the battery. Studies using X-ray photoelectron spectroscopy (XPS) reveal that the cathode becomes doped with Li + ions as the cell discharges.
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