Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 15, Issue 1, Pages 183-188Publisher
SPRINGER
DOI: 10.1007/s10008-010-1084-y
Keywords
Cobalt oxide; Carbon nanofiber; Composite material; Anode; Lithium-ion batteries
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Platelike CoO/carbon nanofiber (CNF) composite materials with porous structures are synthesized from the thermal decomposition and recrystallization of beta-Co(OH)(2)/CNF precursor without the need for a template or structure-directing agent. As negative electrode materials for lithium-ion batteries, the platelike CoO/CNF composite delivers a high reversible capacity of 700 mAh g(-1) for a life extending over hundreds of cycles at a constant current density of 200 mA g(-1). More importantly, the composite electrode shows significantly improved rate capability and electrochemical reversibility. Even at a current of 2 C, the platelike CoO/CNF composite maintain a capacity of 580 mAh g(-1) after 50 discharge/charge cycles. The improved cycling stability and rate capability of the CoO/CNF composite electrodes may be attributed to synergistic effect of the porous structural stability and improved conductivity through CNF connection.
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