INVESTIGADORES
BARRACO DIAZ Daniel Eugenio
congresos y reuniones científicas
Título:
Synergistic effect in mesoporous SiO2 carbonaceous composites as anodes for lithium-ion Battery
Autor/es:
G. LENER; M. OTERO; A. GARCIA-BLANCO; K. SAPAG; D. BARRACO; E. LEIVA
Lugar:
Jujuy
Reunión:
Workshop; 3re INTERNATIONAL WORKSHOP ON LITHIUM , INDUSTRIAL; 2016
Institución organizadora:
Universidad de Jujuy
Resumen:
Synergistic effect in mesoporous SiO2 carbonaceous composites as anodes for lithium-ion batteryThe combination of mesoporous SiO2 with carbonaceous structures may provide good anode materials for lithium ion batteries.Mesoporous SBA15/C composites were prepared and characterized as lithium ion battery anodes showing a reasonable good capacity, cyclability and rate capability properties. Several types of mesoporous SiO2 materials could be used, we use SBA15 because has a spatial arrangement of two domain of pores: one with pore diameter 6-8 nm and other with pore diameter about of 1 nm conforming a combination of mesopores interconnected with micropores. The nanomaterials based in coated SiO2/C present a different profile of electrochemical reduction of silica by Li, and the shape and size of the active sites are determinant for the lithium insertion and reaction [1,2]. The electrochemical dE/dV measurement and the DRX-insitu analysis indicate the irreversible formation of different silicates and silicon during the first cycles and the formation of LixSiy alloys during the following charge/discharge process. We have sintethized composites that keep their properties during 100 cycles, at relatively high rate discharge rate These types of materials have a considerable potential industrial application because of the easy and low cost synthesis.Keywords: SBA15, SiO2/C composite, lithium-ion battery. References: [1] D.J. Lee, H. Lee, M. Ryou, G. B. Han, J. N. Lee, J. Song, J. Choi, K. Y. Cho, Y. M. Lee, J. K. Park. Electrospun Three-Dimensional Mesoporous Silicon Nanofibers as an Anode Material for High-Performance Lithium Secondary Batteries. ACS Appl. Mater. Interfaces, 5 (2013)[2] T. D. Bogart, D. Oka, X. Lu, M. Gu, C. Wang, B. A. Korgel. Lithium ion battery performance of silicon nanowires with carbon skin. ACS Nano, 8 (2014).
