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Materials Science and Nanotechnology | Volume 2
May 21-22, 2018 | New York, USA
International Conference on
Nanoscience & Technology
M
aterials for lithium-ion battery (LIB) applications have
become the topic for intensive research. Several oxide-
based materials have been studied such as the graphitic
carbons as anodes which are limited by a low theoretical
capacity about 372 mAh·g-1, and electrochemically
active metal oxides CuO, SnO
2
, Fe3O4 or Co
3
O
4
with high
theoretical capacities ~1000 mAh·g-1. One disadvantage
is a large volume expansion and particle agglomeration
during the lithiation/delithiation processes that lead to rapid
degradation of the battery. Herein, we report the study of
SnO
2
and TiO
2
nanoparticles and their composites with
graphene oxide (GO) for applications as anodes in Li-ion
batteries. Two chemical routes were used for the synthesis of
nanoparticles in order to check its stability and effectiveness.
One is the sol-gel method and the other one is the hydrolysis
method. Capacity-cycle and capacity-voltage measurements
have been performed in a coin cell type. SnO
2
batteries show
a high capacity in the charge/discharge process up to 100
cycles; however, TiO
2
nanoparticles reveals a large stability in
capacity terms up to 200 cycles, and finally an intermediate
capacity for the GO/SnO
2
composite that remains stable still
in the 200
th
cycle, that can be used as a promising alternative
anode material for LIBs.
Speaker Biography
Julio Ramirez-Castellanos works in the synthesis and structural/microstructural
characterizations of new functional inorganic materials by high-resolution electron
microscopy. Currently, he is professor at Complutense University, Madrid. He is co-
author of more than 100 reviewed scientific publications, 4 invention patents, and
more than 100 communications to international conferences.
e:
jrcastel@quim.ucm.esSno
2
and Tio
2
/ graphene oxide composites for applications in Li-ion batteries
Julio Ramírez-Castellanos
Universidad Complutense Madrid, Spain