title: Ultrathin coatings on nano-LiCoO2 for Li-ion vehicular applications.
abstract: To deploy Li-ion batteries in next-generation vehicles, it is essential to develop electrodes with durability, high energy density, and high power. Here we report a breakthrough in controlled full-electrode nanoscale coatings that enables nanosized materials to cycle with durable high energy and remarkable rate performance. The nanoparticle electrodes are coated with Al(2)O(3) using atomic layer deposition (ALD). The coated nano-LiCoO(2) electrodes with 2 ALD cycles deliver a discharge capacity of 133 mAh/g with currents of 1400 mA/g (7.8C), corresponding to a 250% improvement in reversible capacity compared to bare nanoparticles (br-nLCO), when cycled at this high rate. The simple ALD process is broadly applicable and provides new opportunities for the battery industry to design other novel nanostructured electrodes that are highly durable even while cycling at high rate.
authors.affiliation: Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0427, USA.
authors.forename: Isaac D
authors.initials: ID
authors.lastname: Scott
authors.forename: Yoon Seok
authors.initials: YS
authors.lastname: Jung
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Cavanagh
authors.forename: Yanfa
authors.initials: Y
authors.lastname: Yan
authors.forename: Anne C
authors.initials: AC
authors.lastname: Dillon
authors.forename: Steven M
authors.initials: SM
authors.lastname: George
authors.forename: Se-Hee
authors.initials: SH
authors.lastname: Lee
mesh_terms: D001336:Automobiles; D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization / Q000379:methods; D011211:Electric Power Supplies; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size
chemical_list: D008567:Membranes, Artificial; D010087:Oxides; C491691:lithium cobalt oxide; D003035:Cobalt