期刊
NANO LETTERS
卷 11, 期 2, 页码 414-418出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1030198
关键词
Atomic layer deposition; LiCoO2; rate performance; Li-ion battery; capacity fade; nanotechnology
类别
资金
- DARPAN/MEMS ST [N66001-10-1-4007]
- University of Colorado's Nanomaterials Characterization Facility
- U.S. Department of Energy through DOE Office of Energy Efficiency and Renewable Energy Office of the Vehicle Technologies [DE-AC36-08GO28308]
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 Al2O3 using atomic layer deposition (ALD). The coated nano-LiCoO2 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 highly durable even while cycling at high rate.
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