Phase Relationships and Structural and Chemical Stabilities of Charged Li[sub 1−x]CoO[sub 2−δ] and Li[sub 1−x]Ni[sub 0.85]Co[sub 0.15]O[sub 2−δ] Cathodes

Conditioning of Li(Ni,Co)O2 Cathode Materials for Rechargeable Batteries During the First Charge‐Discharge Cycles

“…x Ni 0.85 Co 0.15 O 2 for 1-x < 0.3 based on chemical Li-extraction, [13] because a decreasing c/a ratio is calculated for O3' in contrast to our in situ observation for B and C. The migration of Ni-ions and their partial or complete ordering is proposed as the conditioning process of Li(Ni,-Co)O 2 cathode materials. The amount of Ni-ions on the Li-layers contributes to the irreversible capacity loss, because these Ni-ions are not expected to move back to the (Ni,Co)-layers during Li-insertion, nor are Li-ions expected to occupy the induced vacancies on the (Ni,Co)-site.…”

Comparative Issues of Cathode Materials for Li-Ion Batteries

“…Chemical analysis of electrochemically charged Li 1−x CoO 2 samples indicates that the oxygen loss occurs below lithium content x = 0.5 [65]. The results suggest that the cobalt oxide system is intrinsically prone to lose oxygen for x < 0.5 in the Li-ion cells.…”

Microwave synthesis of spherical spinel LiNi0.5Mn1.5O4 as cathode material for lithium-ion batteries

“…Although LiCoO 2 has been dominatingly used as cathode material for small size LIBs, it is difficult to be used in large-volume, high-power LIBs due to its safety problem and high cost. Many studies have focused on the development of other alternative cathode materials in view of cost, safety and environment [4,5].…”