TY - JOUR
T1 - Effect of Titanium Content in MWCNT@Sn1-xTixO2 Composites on the Lithium Ion Storage Process
AU - Ramírez-Vargas, Mirna
AU - Calva, Julio C.
AU - de la Fuente, Mauricio Solís
AU - Jaramillo-Quintero, Oscar A.
AU - Herrera-Garza, José R.
AU - Acevedo-Peña, Próspero
AU - Rincón, Marina E.
N1 - Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/8/11
Y1 - 2017/8/11
N2 - We report the synthesis of multiwall carbon nanotubes@metal oxide composites (MWCNT@Sn1-xTixO2) and explore the lithium storage capacity and mechanisms in a broad range of compositions. The composite structures were synthesized by hydrothermal method using SnCl4 and TiCl4 as Sn and Ti sources, respectively. Oxide adherence on the carbon surface, as well as an optimum ratio between surface area and porosity, seem to be promoted by Sn content, with MWCNT@Sn0.75Ti0.25O2 showing the best performance in terms of Li capacity and structure stability. Cycled in a potential range of 3 to 1 V vs Li/Li+, the composite shows an insertion mechanism reported for solid solutions with low Sn content, whereas at cut off potential of 0 V vs Li/Li+ the alloying mechanism expected for SnO2 is dominant. Nevertheless, the presence of Ti during the transformation of the solid solution impacts positivily the performance of these electrodes.
AB - We report the synthesis of multiwall carbon nanotubes@metal oxide composites (MWCNT@Sn1-xTixO2) and explore the lithium storage capacity and mechanisms in a broad range of compositions. The composite structures were synthesized by hydrothermal method using SnCl4 and TiCl4 as Sn and Ti sources, respectively. Oxide adherence on the carbon surface, as well as an optimum ratio between surface area and porosity, seem to be promoted by Sn content, with MWCNT@Sn0.75Ti0.25O2 showing the best performance in terms of Li capacity and structure stability. Cycled in a potential range of 3 to 1 V vs Li/Li+, the composite shows an insertion mechanism reported for solid solutions with low Sn content, whereas at cut off potential of 0 V vs Li/Li+ the alloying mechanism expected for SnO2 is dominant. Nevertheless, the presence of Ti during the transformation of the solid solution impacts positivily the performance of these electrodes.
KW - Li insertion process
KW - Li-ion Batteries
KW - SnTiO solid solutions
UR - http://www.scopus.com/inward/record.url?scp=85041852685&partnerID=8YFLogxK
U2 - 10.1002/slct.201701284
DO - 10.1002/slct.201701284
M3 - Artículo
SN - 2365-6549
VL - 2
SP - 6850
EP - 6856
JO - ChemistrySelect
JF - ChemistrySelect
IS - 23
ER -