Journal
RSC ADVANCES
Volume 5, Issue 10, Pages 7237-7244Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra15228j
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Funding
- Independent Innovation Foundations of Shandong University [2012ZD001, 2012JC013]
- Doctoral Program of Higher Education of China [20130131110068]
- New Century Excellent Talent Program [NCET-10-0545]
- State Education Ministry
- Natural Science Fund for Distinguished Young Scholars of Shandong [JQ201312]
- National Science Foundation (NSF), USA [CMMI 10-30755, CMMI 13-14486]
- Div Of Civil, Mechanical, & Manufact Inn [1030755] Funding Source: National Science Foundation
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In this work, multi-walled carbon nanotube (MWNT) nanocomposites with homogenously anchored nanomagnetite of 10-20 nm prepared by a hydrothermal-annealing method have been demonstrated to serve as anode materials for lithium ion batteries (LIBs) with a specific capacity of 829 mA h g(-1) after 50 cycles at a current density of 100 mA g(-1) and a reversible capacity of 686 mA h g(-1) at a current density of 200 mA g(-1) for the nanocomposites with a weight ratio of 1 : 1, much larger than the specific capacity of 230 mA h g(-1) after 50 cycles at a current density of 100 mA g(-1) and a reversible capacity of 195 mA h g(-1) at a current density of 200 mA g(-1) for the MWNTs. The MWNTs in the nanocomposites could efficiently buffer the strain of volume change during lithiation/delithiation and greatly improve the electrical conductivity of the electrodes. The superior electrochemical performances of the Fe3O4/MWNTs were found to originate from the unique conductive network of the MWNTs in the nanocomposites as well as the high capacity from the nanomagnetite.
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