Pillar Effect in <scp>Ni‐rich</scp> Cathode of <scp>Li‐Ion</scp> Battery by <scp>NH<sub>3</sub></scp> Thermal Treatment
Geun Jun Lee, Muhammad A. Abbas, Jin Ho Bang
Abstract
Ni‐rich layered LiNi x Mn y Co z O 2 (NCM) materials are used in lithium‐ion batteries because of their high cathode capacity. The high nickel content, however, usually leads to severe capacity fading and structural collapse after repeated charging and discharging. To mitigate these problems, we heat‐treated NCM in an NH 3 atmosphere to form Ni 2+ pillars between Li layers. The Ni 2+ pillars improve the cycling stability of NCM by alleviating degradation of the Li layer. This is a simple and effective method for improving the stability of Ni‐rich NCM.
Topics & Concepts
CathodeNickelThermal stabilityMaterials scienceDegradation (telecommunications)Battery (electricity)IonLithium (medication)Chemical engineeringPillarChemistryMetallurgyPhysical chemistryComputer scienceTelecommunicationsThermodynamicsOrganic chemistryPhysicsMedicineEndocrinologyEngineeringPower (physics)Structural engineeringAdvancements in Battery MaterialsSupercapacitor Materials and FabricationAdvanced Battery Materials and Technologies