<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2007000400001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio de la conductividad del sistema amorfo Li2S-Sb2S3-P2S5]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nagamedianova]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[E.M]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma de Nuevo León Facultad de Ciencias Químicas Laboratorio de Investigación del Vidrio]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2007</year>
</pub-date>
<volume>53</volume>
<numero>4</numero>
<fpage>228</fpage>
<lpage>234</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2007000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2007000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2007000400001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Existe un gran interes hacia los vidrios sulfuros debido a la alta conductividad inherente del ion litio en estos compuestos, dada la polarizabilidad del ion sulfuro. En el presente trabajo se presenta un estudio sistemático de la conductividad del sistema vitreo Li2S-Sb2S3-P2S5 y se discute su posible aplicación en baterías de estado sólido. La síntesis de vidrios fue realizada por el método de fusión-templado y su amorficidad fue confirmada mediante el uso de difracción de rayos X (DRX), microscopía y calorimetría diferencial de barrido (CDB). La conductividad de estos vidrios fue analizada por medio de espectroscopía de impedancia (EI). La conductividad iónica de las muestras alcanzó valores del orden de &#956;S/cm a temperatura ambiente, que permite ubicarlos como electrolitos sólidos de litio. Además, se reportan los valores de energía de activación y factor preexponencial de acuerdo al modelo de conductividad lineal tipo Arrhenius y por otro lado se ajustaron los datos de impedancia con un modelo de circuito equivalente del tipo R(RQ)(RQ). Los resultados son comparables a otros tiovidrios de litio basados en P2S5, SiS2, GeS2, As2S3 etc. Aunque las conductividades iónicas obtenidas no son suficientes para aplicaciones en baterías tradicionales, estos nuevos vidrios podrían ser utilizados en microbaterias de estado sólido de litio en forma de las películas delgadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[There is a great interest in sulfide glasses because of their high lithium ion conductivity. This work presents the study of new glasses based on Li2S-Sb2S3-P2S5 system which are ionic lithium conductors with possible application in solid state batteries of lithium. The synthesis of glasses has been performed by classical quenching technique and glassy nature was confirmed by various techniques as X-Ray Diffraction (XRD), Microscopy and Differential Scanning Calorimetry (DSC). Conductivities have been determined by Impedance Spectroscopy (IS). Some compositions of high lithium content have presented ionic conductivities close to 10-6 S/cm at room temperature that permits to consider them as solid lithium conductors. In addition, the values of activation energy, Ea, pre-exponential factors, g&#963;0, and circuit equivalent model R(RQ)(RQ) were reported. The results are comparable to those ones of other lithium glasses based on P2S5, SiS2, GeS2, As2S3 etc. Despite ionic conductivities are insufficient for application on common batteries, those new glasses based on Li2S-Sb2S3 and prepared as thin films could be used on solid state microbatteries of lithium.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Baterías de litio]]></kwd>
<kwd lng="es"><![CDATA[conductores iónicos sólidos]]></kwd>
<kwd lng="es"><![CDATA[vidrios sulfuros]]></kwd>
<kwd lng="es"><![CDATA[espectroscopía de impedancia]]></kwd>
<kwd lng="en"><![CDATA[Lithium batteries]]></kwd>
<kwd lng="en"><![CDATA[solid ionic conductors]]></kwd>
<kwd lng="en"><![CDATA[sulfide glasses]]></kwd>
<kwd lng="en"><![CDATA[impedance spectroscopy]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4"><b>Investigaci&oacute;n</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Estudio de la conductividad del sistema amorfo Li<sub>2</sub>S&#150;Sb<b><sub>2</sub></b>S<sub>3</sub>&#150;P<b><b><sub>2</sub></b></b>S<sub>5</sub></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>        <p align="center"><font face="verdana" size="2"><b>Z. Nagamedianova y E.M. S&aacute;nchez</b></font></p>     <p align="justify"><font face="verdana" size="2"><i>Laboratorio de Investigaci&oacute;n    del Vidrio, Facultad de Ciencias Qu&iacute;micas, Universidad Aut&oacute;noma    de Nuevo Le&oacute;n,    <br> e&#150;mail: <a href="mailto:infolabiv@yahoo.com" target="_blank">infolabiv@yahoo.com</a></i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 5 de enero de 2006    <br>   Aceptado el 27 de abril de 2007</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Existe un gran interes hacia    los vidrios sulfuros debido a la alta conductividad inherente del ion litio    en estos compuestos, dada la polarizabilidad del ion sulfuro. En el presente    trabajo se presenta un estudio sistem&aacute;tico de la conductividad del sistema    vitreo Li<sub>2</sub>S&#150;Sb<sub>2</sub>S<sub>3</sub>&#150;P<sub>2</sub>S<sub>5</sub>    y se discute su posible aplicaci&oacute;n en bater&iacute;as de estado s&oacute;lido.    La s&iacute;ntesis de vidrios fue realizada por el m&eacute;todo de fusi&oacute;n&#150;templado    y su amorficidad fue confirmada mediante el uso de difracci&oacute;n de rayos    X (DRX), microscop&iacute;a y calorimetr&iacute;a diferencial de barrido (CDB).    La conductividad de estos vidrios fue analizada por medio de espectroscop&iacute;a    de impedancia (EI). La conductividad i&oacute;nica de las muestras alcanz&oacute;    valores del orden de <i>&mu;</i>S/cm a temperatura ambiente, que permite ubicarlos    como electrolitos s&oacute;lidos de litio. Adem&aacute;s, se reportan los valores    de energ&iacute;a de activaci&oacute;n y factor preexponencial de acuerdo al    modelo de conductividad lineal tipo Arrhenius y por otro lado se ajustaron los    datos de impedancia con un modelo de circuito equivalente del tipo R(RQ)(RQ).    Los resultados son comparables a otros tiovidrios de litio basados en P<sub>2</sub>S<sub>5</sub>,    SiS<sub>2</sub>, GeS<sub>2</sub>, As<sub>2</sub>S<sub>3</sub> etc. Aunque las    conductividades i&oacute;nicas obtenidas no son suficientes para aplicaciones    en bater&iacute;as tradicionales, estos nuevos vidrios podr&iacute;an ser utilizados    en microbaterias de estado s&oacute;lido de litio en forma de las pel&iacute;culas    delgadas.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Bater&iacute;as de litio; conductores i&oacute;nicos s&oacute;lidos; vidrios sulfuros; espectroscop&iacute;a de impedancia.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">There is a great interest in sulfide glasses because of their high lithium ion conductivity. This work presents the study of new glasses based on Li<sub>2</sub>S&#150;Sb<sub>2</sub>S<sub>3</sub>&#150;P<sub>2</sub>S<sub>5</sub> system which are ionic lithium conductors with possible application in solid state batteries of lithium. The synthesis of glasses has been performed by classical quenching technique and glassy nature was confirmed by various techniques as X&#150;Ray Diffraction (XRD), Microscopy and Differential Scanning Calorimetry (DSC). Conductivities have been determined by Impedance Spectroscopy (IS). Some compositions of high lithium content have presented ionic conductivities close to 10<sup>&#150;6</sup> S/cm at room temperature that permits to consider them as solid lithium conductors. In addition, the values of activation energy, E<sub>a</sub>, pre&#150;exponential factors, g&sigma;<sub>0</sub>, and circuit equivalent model R(RQ)(RQ) were reported. The results are comparable to those ones of other lithium glasses based on P<sub>2</sub>S<sub>5</sub>, SiS<sub>2</sub>, GeS<sub>2</sub>, As<sub>2</sub>S<sub>3</sub> etc. Despite ionic conductivities are insufficient for application on common batteries, those new glasses based on Li<sub>2</sub>S&#150;Sb<sub>2</sub>S<sub>3</sub> and prepared as thin films could be used on solid state microbatteries of lithium.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Lithium batteries; solid ionic conductors; sulfide glasses; impedance spectroscopy.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS:  82.47.&#150;a; 82.47.Aa</font></p>     ]]></body>
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