Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 9, Issue 1, Pages 49-53Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.08.019
Keywords
nanocomposite; SnS; carbon; thin film anode; lithium ion batteries
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SnS particles with sizes of 5.0-6.5 nm were prepared by a facile method. Resorcinol-formaldehyde sol with addition of the as-prepared SnS nanoparticles was spin-coated on a copper foil to prepare net-like SnS/C composite thin-film electrode for lithium ion batteries after carbonization at 650 degrees C. The SnS/C nanocomposite thin-film electrode showed preferable first coulombic efficiency and excellent cycling stability. The discharge and charge capacities were respectively 542.3 and 531.3 mAh/g after 40 cycles. The attractive electrochemical performances were mainly ascribed to the ultra fine particle, which showed no evident aggregation in high-resolution TEM image, and the effects of 3-dimensional net-like carbon structure, which uniformly surrounded the SnS nanoparticles to guarantee the contact, acted as a buffer matrix to alleviate the volume expansion of Li-Sn alloy and provided enough paths for electrolyte to reach SnS active material during discharge-charge process. (c) 2006 Elsevier B.V. All rights reserved.
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