Understanding Performance Degradation in Cation‐Disordered Rock‐Salt Oxide Cathodes

Understanding structural defects in lithium-rich layered oxide cathodes

Planar defects in lithium-rich layered oxides were examined by aberration-corrected scanning transmission electron microscopy (STEM) to understand their formation. Planar defects were found to form during the transition of the transition metal layer from a disordered R 3m state to a lithiumordered C2/m state. This disorder-to-order transition resulted in three orientation variants, namely [100]...

New Developments in Oxide-coated Cathodes

The first of these articles deals with oxide-coated cathodes designed to be loaded with current densities several times higher than ordinary oxide-coated cathodes can withstand, and which yet have a life of a few thousand hours. Although these new cathodes cannot rival the L type of dispenser cathode as regards their permissible current density, they are cheaper and have a lower operating tempe...

Triple Phase Boundaries in Solid-Oxide Cathodes

Component potential modelling based on solid-oxide electrochemistry is used to study a single-particle configuration where a hemispherical LSM particle sits on a YSZ electrolyte half-space. The primary comparison is between two pathways: one where oxide ions travel on the particle surface; the other where these ions travel through the bulk particle interior. The systems that model each of the p...

Discharge characteristics of silver vanadium oxide cathodes

The discharge characteristics of silver vanadium oxide (SVO) as a cathode in lithium–silver vanadium oxide (Li–SVO) primary battery was studied under various operating conditions. The cathode yielded a capacity of 260 mAh g at a current density of 0.08 mA cm, although the theoretical capacity of this material is 315 mAh g. The pulse discharge characteristics were studied under conditions that s...

Nature of oxygen at rocksalt and spinel oxide surfaces