Preparation of Sn nano-film by direct current magnetron sputtering andits performance as anode of lithium ion battery
(1. Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China;
2. Department of Chemistry, South China Normal University, Guangzhou 510006, China;
3. Department of Mathematics and Physics, Wuyi University, Jiangmen 529020, China)
2. Department of Chemistry, South China Normal University, Guangzhou 510006, China;
3. Department of Mathematics and Physics, Wuyi University, Jiangmen 529020, China)
Abstract: Sn thin film on Cu foil substrate as the anode of lithium ion battery was prepared by direct current magnetron sputtering(DCMS). The surface morphology, composition and thickness and the electrochemical behaviors of the prepared Sn thin film were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD), inductively coupled plasma atomic emission spectrometry(ICP), cyclic voltammetry(CV) and galvanostatic charge/ discharge(GC) measurements. It is found that the Sn film is consists of pure Sn with an average particle diameter of 100 nm. The thickness of the film is about 320 nm. The initial lithium insertion capacity of the Sn film is 771 mA∙h/g. The reversible capacity of the film is 570 mA∙h/g and kept at 270 mA∙h/g after 20 cycles.
Key words: lithium-ion battery; anode; Sn; nano-thin film; direct current magnetron sputtering