<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Gittleson, F. S.</style></author><author><style face="normal" font="default" size="100%">Ryu, W. H.</style></author><author><style face="normal" font="default" size="100%">Taylor, A. D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Operando observation of the gold-electrolyte interface in Li-O2 batteries</style></title><secondary-title><style face="normal" font="default" size="100%">ACS Appl Mater InterfacesACS Appl Mater Interfaces</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">electrochemical impedance spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Li2O2</style></keyword><keyword><style  face="normal" font="default" size="100%">LiO2</style></keyword><keyword><style  face="normal" font="default" size="100%">lithium-air</style></keyword><keyword><style  face="normal" font="default" size="100%">lithium-oxygen</style></keyword><keyword><style  face="normal" font="default" size="100%">Raman spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Sers</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Nov 12</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">21</style></number><volume><style face="normal" font="default" size="100%">6</style></volume><pages><style face="normal" font="default" size="100%">19017-25</style></pages><isbn><style face="normal" font="default" size="100%">1944-8252 (Electronic)&lt;br/&gt;1944-8244 (Linking)</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Observing the cathode interface in Li-O2 batteries during cycling is necessary to improve our understanding of discharge product formation and evolution in practical cells. In this work a gold electrode surface is monitored by operando surface-enhanced Raman spectroscopy during typical discharge and charge cycling. During discharge, we observe the precipitation of stable and reversible lithium superoxide (LiO2), in contrast to reports that suggest it is a mere intermediate in the formation of lithium peroxide (Li(2)O2). Some LiO2 is further reduced to Li(2)O2 producing a coating of insulating discharge products that renders the gold electrode inactive. Upon charging, a superficial layer of these species ( approximately 1 nm) are preferentially oxidized at low overpotentials (&amp;lt;0.6 V), leaving residual products in poor contact with the electrode surface. In situ electrochemical impedance spectroscopy is also used to distinguish between LiO2 and Li(2)O2 products using frequency-dependent responses and to correlate their reduction and oxidation potentials to the accepted mechanism of Li(2)O2 formation. These operando and in situ studies of the oxygen electrode interface, coupled with ex situ characterization, illustrate that the composition of discharge products and their proximity to the catalytic surface are important factors in the reversibility of Li-O2 cells.&lt;/p&gt;
</style></abstract><accession-num><style face="normal" font="default" size="100%">25318060</style></accession-num><notes><style face="normal" font="default" size="100%">Gittleson, Forrest S&lt;br/&gt;Ryu, Won-Hee&lt;br/&gt;Taylor, Andre D&lt;br/&gt;eng&lt;br/&gt;Research Support, Non-U.S. Gov't&lt;br/&gt;Research Support, U.S. Gov't, Non-P.H.S.&lt;br/&gt;2014/10/16 06:00&lt;br/&gt;ACS Appl Mater Interfaces. 2014 Nov 12;6(21):19017-25. doi: 10.1021/am504900k. Epub 2014 Oct 31.</style></notes><auth-address><style face="normal" font="default" size="100%">Department of Chemical and Environmental Engineering, Yale University , 9 Hillhouse Avenue, New Haven, Connecticut, United States.</style></auth-address></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Xu, Xin</style></author><author><style face="normal" font="default" size="100%">Mihnev, Momchil</style></author><author><style face="normal" font="default" size="100%">Taylor, Andre</style></author><author><style face="normal" font="default" size="100%">Forrest, Stephen R.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Organic photodetector arrays with indium tin oxide electrodes patterned using directly transferred metal masks</style></title><secondary-title><style face="normal" font="default" size="100%">Applied Physics Letters</style></secondary-title><short-title><style face="normal" font="default" size="100%">Appl. Phys. Lett.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-01-2009</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://scitation.aip.org/content/aip/journal/apl/94/4/10.1063/1.3072612</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">94</style></volume><pages><style face="normal" font="default" size="100%">043313</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><issue><style face="normal" font="default" size="100%">4</style></issue></record></records></xml>