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RISS 인기검색어
- 검색키워드
- 저자 : Bresser, D. (검색결과 4 건)
- 무료
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Bresser, Dominic,Paillard, Elie,Passerini, Stefano The Korean Electrochemical Society 2014 Journal of electrochemical science and technology Vol.5 No.2
The $Li-O_2$ battery has been attracting much attention recently, due to its very high theoretical capacity compared with Li-ion chemistries. Nevertheless, several studies within the last few years revealed that Li-ion derived electrolytes based on alkyl carbonate solvents, which have been commonly used in the last 27 years, are irreversibly consumed at the $O_2$ electrode. Accordingly, more stable electrolytes are required capable to operate with both the Li metal anode and the $O_2$ cathode. Thus, due to their favorable properties such as non volatility, chemical inertia, and favorable behavior toward the Li metal electrode, ionic liquid-based electrolytes have gathered increasing attention from the scientific community for its application in $Li-O_2$ batteries. However, the scale-up of Li-$O_2$ technology to real application requires solving the mass transport limitation, especially for supplying oxygen to the cathode. Hence, the 'LABOHR' project proposes the introduction of a flooded cathode configuration and the circulation of the electrolyte, which is then used as an oxygen carrier from an external $O_2$ harvesting device to the cathode for freeing the system from diffusion limitation.
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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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Small-scale Piezoelectric Energy Harvesting Devices Using Low-energy-density Sources
Mickael Lallart,Shashank Priya,Daniel J. Inman,Scott Bressers 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.41
Over the last decade, small-scale energy harvesting devices that can power household electronic systems have experienced rapid development in both the research and the industrial fields. However, the large majority of work done in this domain still focuses on high-energy-density sources, which are not always available in the vicinity of the device. In that case, it is, therefore, important to use other sources, which, nevertheless, present lower energy densities. Hence, the purpose of this paper is to investigate such harvesting methods, highlighting their differences with classical techniques that rely on high-density energy resources. Additionally, the present study also aims at reviewing existing techniques for small-scale energy harvesting using piezoelectric devices, as well as presenting new designs when dealing with low energy density sources, with a particular focus on wind and rain.
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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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