Publication Date:
2014-12-19
Description:
Porous Co 3 O 4 microrods have been prepared by an ultrasound-assisted route with subsequent calcination. The as-prepared Co 3 O 4 microrods are composed of interconnected nanoparticles with porous characteristics. The ultrasonic irradiation is critical to determine the morphology and the electrochemical performance of the products. When tested as anode material for lithium-ion battery, the porous Co 3 O 4 microrods show improved capacity and rate cycling performance. The reversible capacity of the materials retains 678 (±5) mAh g −1 after 50 cycles at 100 mA g −1 . Even when cycled at various rate for more than 50 cycles, the reversible capacity recovers to 600 (±5) mAh g −1 for the current of 100 mA g −1 . The improved lithium-storage performance can be attributed to the reduced electrochemical reaction resistance due to the unique porous architecture of Co 3 O 4 microrods.
Print ISSN:
0947-8396
Electronic ISSN:
1432-0630
Topics:
Technology
,
Physics
