Self-Supported Li 4 Ti 5 O 12 –C Nanotube Arrays as High-Rate and Long-Life Anode Materials for Flexible Li-Ion Batteries
2014; American Chemical Society; Volume: 14; Issue: 5 Linguagem: Inglês
10.1021/nl5004174
ISSN1530-6992
AutoresJun Liu, Kepeng Song, Peter A. van Aken, Joachim Maier, Yan Yu,
Tópico(s)Supercapacitor Materials and Fabrication
ResumoSelf-supported Li4Ti5O12–C nanotube arrays with high conductivity architectures are designed and fabricated for application in Li-ion batteries. The Li4Ti5O12 nanotube arrays grow directly on stainless steel foil by a facile template-based solution route, further enhancing electronic conductivity by uniform carbon-coating on the inner and outer surfaces of Li4Ti5O12 nanotubes. Owing to the shortened Li+ diffusion distance, high contact surface area, sufficient conductivity, and very good structure stability of the nanotube arrays, the self-supported Li4Ti5O12–C nanotube arrays exhibit remarkable rate capability (a reversible capability of 135 mA h g–1, 105 mA h g–1, and 80 mA h g–1 at 30C, 60C, and 100C, respectively) and cycling performance (approximate 7% capacity loss after 500 cycles at 10C with a capacity retention of 144 mA h g–1).
Referência(s)