Journal
CARBON
Volume 68, Issue -, Pages 619-627Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2013.11.041
Keywords
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Funding
- Singapore-MIT Alliance (SMA) under the Flagship Research Program (FRP)
- MOE AcRF, Singapore [MOE2011-T2-1-137]
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We fabricated nickel oxide (NiO) on vertically-aligned multiwall carbon nanotube (MWCNT) arrays (MWCNT/NiO) as an electrode for lithium-ion batteries. The specific capacity of 864.8 mA h g(-1) at the rate of 143.6 mA g(-1) for up to 50 cycles was achieved. Compared to the electrode based on NiO thin film on stainless steel, the MWCNT/NiO showed significant improvements because the vertically-aligned MWCNT arrays enabled easy ion and electron transport and acted as excellent base-structures that minimize pulverization of the active materials by absorbing the compressive and tensile stresses during charge and discharge processes. Electrochemical impedance spectroscopy of MINCNT/NiO showed low internal resistance and low charge-transfer resistance of the MWCNT/NiO that suggest superior ion and electron transport, respectively. This demonstrated that the vertically-aligned MWCNT array is a promising current collector for conversion-type active materials. (C) 2013 Elsevier Ltd. All rights reserved.
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