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Electrochemical performance of SnO 2 :Sb–MWCNT nanocomposites for Li‐ion batteries
Author(s) -
Cevher Ozgur,
Guler Mehmet Oguz,
Tocoglu Ubeyd,
Akbulut Hatem
Publication year - 2014
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3132
Subject(s) - materials science , nanocomposite , anode , lithium (medication) , electrochemistry , buckypaper , carbon nanotube , transmission electron microscopy , electrode , scanning electron microscope , chemical engineering , coating , composite material , lithium ion battery , nanotechnology , battery (electricity) , chemistry , medicine , engineering , endocrinology , power (physics) , physics , quantum mechanics
SUMMARY In this study, SnO 2 :Sb coating on Cr‐coated stainless steel and multiwall carbon nanotube (MWCNT) buckypaper substrates were prepared as anode materials using a radio frequency (RF) magnetron sputtering process for lithium‐ion batteries. The nanocomposites were characterized with field‐emission scanning electron microscopy, transmission electron microscopy, X‐ray diffraction and electrochemical test facilities. The evaluation of the electrochemical performance in lithium‐ion batteries showed that the SnO 2 :Sb–MWCNT nanocomposites have shown reversible discharge capacities of 701 mAh g −1 , 732 mAh g −1 and 753 mAh g −1 for different RF powers (75 W, 100 W and 125 W), respectively, after 100 cycles. The high‐capacity retention and cyclability ascribed to the good dispersion, high conductivity and fine particle size of SnO 2 :Sb on MWCNTs. Besides, the MWCNTs in SnO 2 :Sb act as a load carrying buffer component and behave like a flexible reinforcement, alleviating the electrode dilapidation resulted from volume change during the lithium insertion and de‐insertion. Copyright © 2014 John Wiley & Sons, Ltd.