Electrochemical properties of LiNi0.8Co0.15Al0.05O2–graphene composite as cathode materials for lithium-ion batteries

Nickel‐reiche Lithium‐Übergangsmetall‐Schichtverbindungen für Hochenergie‐Lithiumionenakkumulatoren

“…Yoon et al. synthetisierten nach einem Hochenergie‐Kugelmahlverfahren (HEMM) einen LiNi 0.8 Co 0.15 Al 0.05 O 2 ‐Graphen‐Verbundstoff,58 der auch bei Ladeströmen bis 10 C oder 20 C stabile Zyklen (ca.152) sowie eine überlegene Kapazität von 112 mAh g −1 lieferte, die fast doppelt so hoch war wie die des reinen Kathodenmaterials. Auch Lithiumionenleiter wurden als Beschichtungsmaterial für aktive Materialoberflächen getestet.…”

An Ostwald ripening route towards Ni-rich layered cathode material with cobalt-rich surface for lithium ion battery

“…Nonetheless, the above-mentioned electrochemically inactive layer causes lower capacity and Li + diffusion. Therefore, electron conducting materials such as carbon and graphene [50], lithium ion conductors such as Li 2 O· 2B 2 O 3 [51], Li 3 VO 4 [42] and Li 2 ZrO 3 [52,53], have been developed as coating materials for Ni-based cathode materials. Some lithium based materials have also been used to react with residual impurities on the surface of Ni-rich cathode materials and form a uniform coating layer on the bulk surface at the same time [54][55][56].…”

Mechanical Composite of LiNi0.8Co0.15Al0.05O2/Carbon Nanotubes with Enhanced Electrochemical Performance for Lithium-Ion Batteries

“…But stringent control of milling speed and time is critical in order to realize homogenous dispersion of the modifying nanoparticles and at the same time remains the integration of the NCA particles. Moreover, to our best knowledge, except one NCA/graphene composite cathode prepared by ball-milling [22], almost all the reported modifiers so far are inert materials, which although showing good stability have poor electrical conductivity associated with increased polarization of the electrode materials.…”