Tubular Organization of SnO₂ Nanocrystallites for Improved Lithium Ion Battery Anode Performance


Autoria(s): Wang, Yong; Lee, Jim Yang; Zeng, Hua Chun
Data(s)

16/12/2004

16/12/2004

01/01/2005

Resumo

Porous tin oxide nanotubes were obtained by vacuum infiltration of tin oxide nanoparticles into porous aluminum oxide membranes, followed by calcination. The porous tin oxide nanotube arrays so prepared were characterized by FE-SEM, TEM, HRTEM, and XRD. The nanotubes are open-ended, highly ordered with uniform cross-sections, diameters and wall thickness. The tin oxide nanotubes were evaluated as a substitute anode material for the lithium ion batteries. The tin oxide nanotube anode could be charged and discharged repeatedly, retaining a specific capacity of 525 mAh/g after 80 cycles. This capacity is significantly higher than the theoretical capacity of commercial graphite anode (372 mAh/g) and the cyclability is outstanding for a tin based electrode. The cyclability and capacities of the tin oxide nanotubes were also higher than their building blocks of solid tin oxide nanoparticles. A few factors accounting for the good cycling performance and high capacity of tin oxide nanotubes are suggested.

Singapore-MIT Alliance (SMA)

Formato

27561 bytes

application/pdf

Identificador

http://hdl.handle.net/1721.1/7503

Idioma(s)

en

Relação

Molecular Engineering of Biological and Chemical Systems (MEBCS);

Palavras-Chave #tin oxide #nanoparticles #vacuum infiltration #calcifination #nanotubes
Tipo

Article