Net-like SnS/carbon nanocomposite film anode material for lithium ion batteries

作者：Li Y; Tu J P^*; Huang X H; Wu H M; Yuan Y F

来源：Electrochemistry Communications, 2007, 9(1): 49-53.

DOI：10.1016/j.elecom.2006.08.019

• nanocomposite
• SnS
• carbon
• thin film anode
• lithium ion batteries

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.

• 出版日期2007-1
• 单位浙江大学