Size effect of tin oxide nanoparticles on high capacity lithium battery anode materials

✍ Scribed by Yi-Chun Chen; Jin-Ming Chen; Yue-Hao Huang; Yu-Run Lee; Han C. Shih

• Book ID: 104094152
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 734 KB
• Volume: 202
• Category: Article
• ISSN: 0257-8972
• DOI: 10.1016/j.surfcoat.2007.08.048

✦ Synopsis

Tin oxide anode materials have a high reversible capacity for secondary lithium ion batteries. However, the volume expansion of tin oxide is known to reduce the battery cycle life. Nanocomposite anode materials were thus synthesized using a sol-gel method to solve this problem. The nanocomposite materials (SnO 2 /C) have a core-shell structure. The core is made of commercial graphite (∼10 μm) and the shell is made of the tin oxide nanoparticles. The morphology and the nanostructure were characterized by SEM (JSM-6500F) and the results of electrochemical tests were analyzed using an Arbin BT2400 battery tester. The tin oxide nanoparticles (∼20 nm) uniformly dispersed on the surface of commercial graphite. The tin oxide nanoparticles had a markedly greater cyclability than the micro-tin oxide particles. The tin oxide nanoparticles are believed to reduce the effect of volume expansion. It is apparent that the nanocomposite structure (SnO 2 /C) inhibits the volume expansion of the tin oxide anode materials.