The Electrochemical Stability of Spinel Electrodes Coated with ZrO[sub 2], Al[sub 2]O[sub 3], and SiO[sub 2] from Colloidal Suspensions

Stoichiometric and substituted spinel electrodes, coated with and from colloidal suspensions, have been evaluated in lithium cells. -coated electrodes provide the best cycling stability at 50°C. The excellent cycling stability is attributed to a porous network of amphoteric particles, less than 4 nm in dimension, that protect the spinel surface from acid attack by scavenging HF and from the electrolyte, while still allowing access of the electrolyte to the active electrode. © 2004 The Electrochemical Society. All rights reserved.