Journal
JOURNAL OF POWER SOURCES
Volume 238, Issue -, Pages 173-179Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.03.085
Keywords
Cuprous oxide; Porous carbon; Anode material; Lithium ion batteries
Funding
- National 973 Program of China [2009CB220100]
- National 863 Program of China [2013AA050903]
- U.S.-China Clean Energy Research Center Clean Vehicles Consortium [2010DFA72760-101]
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The paper reports a novel nano-structured Cu2O/porous carbon (PC) composite and its application as an anode material for lithium ion batteries. The architecture and the electrochemical performance of the as-prepared composite are investigated through structure characterization and galvanostatic charge/discharge test. Cu2O nanoparticles are well-distributed in the pore channels owing to the nanoscale confinement effect apart from the edges of PC matrix. The composite exhibits a high reversible capacity of 884.4 mA h g(-1) after 100 cycles, especially an excellent rate capability of 600.8 mA h g(-1) when cycled at the current density of 1000 mA g(-1). The outstanding lithium storage properties may be attributed to the designed embedment structure of the composite. The nano-sized Cu2O loaded in the PC promotes the reaction of lithiation/delithiation owing to the large contact area and short lithium ion diffusion distance. Additionally, PC with highly-developed porous structure is capable of accommodating large volume expansion of Cu2O and preventing the aggregation of particles upon continuous cycling. (c) 2013 Elsevier B.V. All rights reserved.
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