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RISS 인기검색어
- 검색키워드
- 저자 : Oberhumer, P. (검색결과 2 건)
- 무료
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- 유료
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Interphase Evolution of a Lithium-Ion/Oxygen Battery
Elia, Giuseppe Antonio,Bresser, Dominic,Reiter, Jakub,Oberhumer, Philipp,Sun, Yang-Kook,Scrosati, Bruno,Passerini, Stefano,Hassoun, Jusef American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.40
<P>A novel lithium-ion/oxygen battery employing Pyr<SUB>14</SUB>TFSI-LiTFSI as the electrolyte and nanostructured Li<SUB><I>x</I></SUB>Sn–C as the anode is reported. The remarkable energy content of the oxygen cathode, the replacement of the lithium metal anode by a nanostructured stable lithium-alloying composite, and the concomitant use of nonflammable ionic liquid-based electrolyte result in a new and intrinsically safer energy storage system. The lithium-ion/oxygen battery delivers a stable capacity of 500 mAh g<SUP>–1</SUP> at a working voltage of 2.4 V with a low charge–discharge polarization. However, further characterization of this new system by electrochemical impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy reveals the progressive decrease of the battery working voltage, because of the crossover of oxygen through the electrolyte and its direct reaction with the Li<SUB><I>x</I></SUB>Sn–C anode.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2015/aamick.2015.7.issue-40/acsami.5b07414/production/images/medium/am-2015-07414p_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am5b07414'>ACS Electronic Supporting Info</A></P>
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An Advanced Lithium–Air Battery Exploiting an Ionic Liquid-Based Electrolyte
Elia, G. A.,Hassoun, J.,Kwak, W.-J.,Sun, Y.-K.,Scrosati, B.,Mueller, F.,Bresser, D.,Passerini, S.,Oberhumer, P.,Tsiouvaras, N.,Reiter, J. American Chemical Society 2014 NANO LETTERS Vol.14 No.11
<P>A novel lithium–oxygen battery exploiting PYR<SUB>14</SUB>TFSI–LiTFSI as ionic liquid-based electrolyte medium is reported. The Li/PYR<SUB>14</SUB>TFSI–LiTFSI/O<SUB>2</SUB> battery was fully characterized by electrochemical impedance spectroscopy, capacity-limited cycling, field emission scanning electron microscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The results of this extensive study demonstrate that this new Li/O<SUB>2</SUB> cell is characterized by a stable electrode–electrolyte interface and a highly reversible charge–discharge cycling behavior. Most remarkably, the charge process (oxygen oxidation reaction) is characterized by a very low overvoltage, enhancing the energy efficiency to 82%, thus, addressing one of the most critical issues preventing the practical application of lithium–oxygen batteries.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2014/nalefd.2014.14.issue-11/nl5031985/production/images/medium/nl-2014-031985_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl5031985'>ACS Electronic Supporting Info</A></P>
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