Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes

Nowadays, rechargeable batteries with higher energy density are required for our society due to the needs of cleaner and more efficient energy systems and with the objective of supplying the increasing technological demands. Commercial lithium batteries are systems based on intercalation compounds a...

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Detalles Bibliográficos
Autores principales: Ortiz, Mariela, Visintin, Arnaldo, Real, Silvia
Formato: Documento de conferencia publishedVersion docunento de conferencia
Lenguaje:Inglés
Publicado: Topical Meeting of the International Society of Electrochemistry 2017
Materias:
electrochemical performance; Carbon; Sulfur; Lithium; battery cathodes
Acceso en línea:http://hdl.handle.net/20.500.12272/2472
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-2472
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic electrochemical performance; Carbon; Sulfur; Lithium; battery cathodes
spellingShingle electrochemical performance; Carbon; Sulfur; Lithium; battery cathodes
Ortiz, Mariela
Visintin, Arnaldo
Real, Silvia
Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
topic_facet electrochemical performance; Carbon; Sulfur; Lithium; battery cathodes
description Nowadays, rechargeable batteries with higher energy density are required for our society due to the needs of cleaner and more efficient energy systems and with the objective of supplying the increasing technological demands. Commercial lithium batteries are systems based on intercalation compounds able to delivering specific energies about 150-200 WhKg-1, one-third of their theoretical energy ( ≈ 600 Wh kg-1). It is difficult for the reversible capacity of these intercalation compounds to be increased, thus the need to explore new cathodes formed by lighter materials and involving electrochemical reactions of more than one electron. An element satisfying these conditions is sulfur (with a theoretical capacity of 1675 mAhg-1 and a specific energy of 2600 WhKg-1). The lithium-sulfur battery has been investigated by different groups in past decades; however, there are serious drawbacks, which have not been overcome yet, so it limits the practical development of this system [3]. Moreover, sulfur is much more abundant, inexpensive, and non-toxic compared to the transition-metal oxide cathodes. We present here the preparation of composites with carbon and sulfur materials in a single fabrication process: using S2C as the solvent. The characterization of the prepared material was performed using optical techniques (X-ray diffraction, scanning electron microscopy and transmission) and its electrochemical performance in lithium-sulfur batteries was studied using electrochemical techniques such as: charge-discharge cycles, galvanostatic discharges to different currents and cyclic voltammetry. The prepared composite materials delivered higher capacities in the first cycles (≈800 mAhg-1) and then it were stabilized at values around 60% of the initial capacity. Also, carbon electrochemical response was not observed, so its main function is to act effectively as an electron-conducting and support matrix.
format Documento de conferencia
publishedVersion
docunento de conferencia
author Ortiz, Mariela
Visintin, Arnaldo
Real, Silvia
author_facet Ortiz, Mariela
Visintin, Arnaldo
Real, Silvia
author_sort Ortiz, Mariela
title Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
title_short Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
title_full Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
title_fullStr Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
title_full_unstemmed Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
title_sort electrochemical performance of carbon sulfur as lithium sulfur battery cathodes
publisher Topical Meeting of the International Society of Electrochemistry
publishDate 2017
url http://hdl.handle.net/20.500.12272/2472
work_keys_str_mv AT ortizmariela electrochemicalperformanceofcarbonsulfuraslithiumsulfurbatterycathodes
AT visintinarnaldo electrochemicalperformanceofcarbonsulfuraslithiumsulfurbatterycathodes
AT realsilvia electrochemicalperformanceofcarbonsulfuraslithiumsulfurbatterycathodes
bdutipo_str Repositorios
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