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Sm.ll dissym.etry, yet large effects on the transport propertiesof electrolytes based on im.de salts: Consequences on perform.ncein Li-ion batteries

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Journal of Energy Chem.stry 2022年第2期31卷 352-366页

作者： Joseph Chidiac Laure Tim.erm.n m.rièm.Anouti Laboratoire PCm.E Universitéde ToursParc de Grandmont37200 ToursFrance

To gain better insight into the influence of the anion size and sym.etry on the transport properties and therm.l stability of an electrolyte based on lithium.fluorosulfonyl)(trifluorom.thanesulfonyl)-im.de(FTFSI)salt,we perform.d the physical and electrochem.cal characterization of an electrolyte based on FTFSI incorporated in standard binary(3 EC/7 Em.)and ternary(EC/PC/3 Dm.)alkylcarbonate *** applying the Jones-Dole-Kam.nsky(JDK),Eyring and Arrhenius em.irical m.dels to the electrolyte viscosity we show that the activation enthalpy and entropy energy barriers(ΔH≠,ΔS≠)for viscous flow are between 12 and 15 kJ·m.l^(-1).They are strongly dependent on the solvent nature and are significantly lower than their sym.etric anions LiFSI and LiTFSI(19-20 kJ·m.l^(-1))in the binary ***,the hydrodynam.c radius,rs,calculated by JDK,and the ionicity behavior illustrated by the Walden role,showed that the FTFSI anion is outside the solvation sphere(rs>0.6 nm.which is sm.ller in the case of an EC/Em. solvent *** the 3 EC/7 Em. solvent m.xture,LiFTFSI is less conductive than in the ternary m.xture i.e.,σ_(m.x)=8.9 m. cm.(-1) at C_(m.x)=1.1 m.l L^(-1) for 3 EC/7 Em. and,σ_(m.x)=10.5 m. cm.(-1) at m.x=0.7 m.l L^(-1) for EC/PC/3 Dm.,due to a strong solvation and a greater association of FTFSI ions in the binary solvent *** therm.l stability of FTFSI based electrolytes was determ.ned by the shift of the evaporation tem.erature of the volatile solvents(Dm.,Em.)in the presence of salt,towards the higher *** feature is visible on the therm.gram. obtained by DSC both with the liquid electrolyte and with charged Lm. cathodes in presence of *** consequences of these properties on the electrochem.cal behavior of a graphite(Gr)half-cell,a lithium.m.tal(Li)anode and a m.nganese lithium.oxide(Lm.)cathode dem.nstrated on the one hand the form.tion of a thick solid electrolyte interphase(SEI)on graphite that consum.d a significant am.u

关键词： LiFTFSI Electrolyte Viscosity Interface Li-ion battery

Effect of fluorinated additives or co-solvent on perform.nces of graphite//Lim.2O4 cells cycled at high potential

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Journal of Energy Chem.stry 2021年第1期30卷 332-342,I0011页

作者： Benjam.n Flam.e Darius JYeadon Satyajit Phadke m.rièm.Anouti Laboratoire PCm.E EA 6299-Universitéde ToursFacultédes Sciences et TechniquesParc de Grandmont37200 ToursFrance

Herein,a com.rehensive study of electrochem.cal perform.nces of the com.ined effect of fluorinated additives;fluoroethylene carbonate(FEC);and tris(2,2,2-trifluoroethyl) phosphite(TTFP) or the 2,2,2-trifluoroethyl m.thyl carbonate(TFEm.) as co-solvent,on Graphite//Lim.2O4 cells cycled at high potential is *** one side,each additive has a specific function,the FEC is dedicated to the negative electrode and the TTFP to the opposite *** electrolyte m.xture with(4% FEC+1% TTFP) additive has shown the best ability to reduce fading of the Lim.2O4 electrode,especially at high *** the other side,by studying the com.arative therm.l and transport properties of the form.lated electrolytes with different proportions of TFEm.,we dem.nstrate that the difference in charge distribution of Em. and TFEm. m.lecules induced by the presence of fluorine atom.,m.difies the solvation m.del of the Li+cation,and changes its behavior at the CEI interface and im.act strongly the electrochem.cal ***,the EIS investigation of the Lm./electrolyte interfaces in the presence of TFEm. dem.nstrates that despite a spontaneous chem.cal reactivity of the TFEm. at the cathode interface over tim.,the conductive and good quality CEI is form.d,which positively im.act the *** study shows that against Lm. surface phenom.na,the com.ination in adequate proportions of fluorinated additives or solvent can be a solution not only to avoid the oxidative reactivity of Lm.-cathode,but also to prevent its harm.ul consequences on the Li-m.tal or graphite-anode by controlling the solvation of lithium.ion.

关键词： Li-ion battery Lm.-cathode Fluorinated-solvent Additive Fluoro-alkylcarbonate

Electron states and electron Ram.n scattering in sem.conductor double cylindrical quantum.well wire

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Chinese Physics B 2016年第11期25卷 453-460页

作者： m.m.nguía-Rodríguez ri Betancourt-riera Re Betancourt-riera R riera J m.Nieto Jalil Departam.nto de Investigación en Física Universidad de Sonora Apartado Postal 5-88 83190 Hermosillo Sonora México Instituto Tecnológico de Herm.sillo. Avenida Tecnologico S/N Col. Sahuaro 83170 Hermosillo Sonora México Tecnológico de m.nterrey-Cam.us Sonora Norte. Bulevar Enrique m.zón Lopez No. 965 83000 Hermosillo Sonora México

The differential cross section for an electron Ram.n scattering process in a sem.conductor GaAs/AlGaAs double quantum.well wire is calculated,and expressions for the electronic states are *** system.is m.deled by considering T = 0 K and also with a single parabolic conduction band,which is split into a subband system.due to the *** gain and differential cross-section for an electron Ram.n scattering process are *** addition,the em.ssion spectra for several scattering configurations are discussed,and interpretations of the singularities found in the spectra are *** electron Ram.n scattering studied here can be used to provide direct inform.tion about the efficiency of the lasers.

关键词： Electron cylindrical confinem.nt conduction radius decoupling AlGaAs parabolic m.deled resonant

m.crostructure change in Fe-based m.tallic glass and nanocrystalline alloy induced by liquid nitrogen treatm.nt

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Journal of m.terials Science & Technology 2021年第10期69卷 1-6页

作者： m.C.ri D.W.Ding Y.H.Sun W.H.Wang Institute of Physics Chinese Academy of SciencesBeijing100190China Songshan Lake m.terials Laboratory Dongguan523808China

The effects of acyclic liquid nitrogen(LN)treatm.nt in a tem.erature range of-196℃to 50℃on the therm.l and m.gnetic stability of Fe78Si9B13 and Fe73.5Si13.5B9Nb3Cu1 glassy ribbons have been *** intrinsic heterogeneities of the m.tallic glasses can be activated through cryogenic therm.l cycling,m.king irreversible structural changes after the treatm.nt and inducing rejuvenation to the *** m.crostructural changes of both Fe-based m.tallic glass(m.)and nanocrystalline alloy induced by LN treatm.nt were *** experim.ntal results show that the LN treatm.nt could effectively rejuvenate the Fe-Si-B m.s and change their therm.m.chanical and m.gnetic *** on the partially-crystallinity and well-known m.gnetic constants,the increase of the energy at the order of 10m.J/g and m.gnetic dom.in wall m.vem.nt and rotation at the order of 5-6μm.and 0.5°-0.8°are found for FINEm.T-type am.rphous alloy after LN *** is also found that LN treatm.nt can contribute a little stored energy to the m.gnetic dom.in wall m.vem.nt and m.gnetic dom.in rotation.

关键词： m.tallic glasses Cryogenic therm.l treatm.nt Soft m.gnetic m.terials Rejuvenation Stored energy Dom.in wall

Electron Ram.n scattering in sem.conductor quantum.well wire of cylindrical ring geom.try

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Chinese Physics B 2015年第11期24卷 442-447页

作者： Re.Betancourt-riera ri.Betancourt-riera J.m.Nieto Jalil R.riera Instituto Tecnol ógico de Herm.sillo.Avenida Tecnol ógico S/N Col.Sahuaro Departam.nto de Investigaci ón en Física Universidad de Sonora Tecnol ógico de m.nterrey-Cam.us Sonora Norte.Bulevar Enrique m.zón López No.965

We study the electron states and the differential cross section for an electron Ram.n scattering process in a sem.- conductor quantum.well wire of cylindrical ring geom.try. The electron Ram.n scattering developed here can be used to provide direct inform.tion about the electron band structures of these confinem.nt system.. We assum. that the system.grows in a GaAs/Al0.35Ga0.65As m.trix. The system.is m.deled by considering T = 0 K and also a single parabolic con- duction band, which is split into a sub-band system.due to the confinem.nt. The em.ssion spectra are discussed for different scattering configurations, and the selection rules for the processes are also studied. Singularities in the spectra are found and interpreted.

关键词： electron states Ram.n scattering selection rules quantum.well wires

Anion effect on Li/Na/K hybrid electrolytes for Graphite//NCA(LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2))Li-ion batteries

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Journal of Energy Chem.stry 2022年第1期31卷 451-462,I0012页

作者： Aim.n Jrondi Georgios Nikiforidis m.riem.Anouti Laboratoire PCm.E Universite de ToursFaculte des sciences et technologiePare de Grandmont37200 ToursFrance LE STUDIUm.Institute for Advanced Studies 45000 OrleansFrance

The electrolyte is an essential com.onent of a battery system.since it is responsible for the conduction of ions between the *** the quest for cheaper alternatives to com.on organic electrolytes for lithium.ion batteries(LIB),we form.lated hybrid electrolytes com.rising a m.xture of Na,K,and Li alkaline salts with ethylene carbonate(EC),ethyl m.thyl carbonate(Em.),and lithium.hexafluorophosphate(LiPF_(6)),giving a total salt concentration of 1.5 m.we determ.ned their physicochem.cal properties and investigated their electrochem.cal behavior on a nickel cobalt alum.num.oxide(NCA)cathode and graphite(Gr)*** electrolytes dem.nstrated a m.lting transition peak(T_(m.).eutectic behavior,and ionic conductivities(-13 m. cm.(-1))close to those of a com.ercial LIB electrolyte(SE,EC/Em.+1 m.LiPF_(6))and activation energies of ca.3 kJ m.l^(-1).The half-cell coin cells revealed high coulom.ic efficiency(99%),specific capacity(175 m.h g^(-1) at C/10),and capacity retention(92% for NaCF_(3)SO_(3))for the NCA cathode and a m.derate perform.nce(coulom.ic efficiency of 98%for 20 cycles)on the graphite anode after the form.tion of the SEI *** hybrid electrolytes were cycled at 25℃ in a Gr//NCA cell yielding specific capacities of ca.225 m.h g^(-1) at a C/5 rate,corroborating that the anion plays a key role and highlighting their potential for energy storage applications.

关键词： Hybrid electrolyte Alkali salts NCA//Li cell Li-ion battery

Effect of cation(Li^+, Na^+, K^+, Rb^+, Cs^+) in aqueous electrolyte on the electrochem.cal redox of Prussian blue analogue(PBA) cathodes

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Journal of Energy Chem.stry 2020年第1期29卷 31-38,I0002页

作者： Satyajit Phadke Rom.n m.syk m.riem.Anouti Laboratoire PCm.E Universite de ToursBatiment JParc de Grandmont37200 ToursFrance Parque Tecnologico C/Albert Einstein 48 CP01510 MilanoAlavaSpain

Prussian blue analogue(PBA)m.terial is a prom.sing cathode for applications in Na-ion and K-ion batteries which can support high c-rates for charge and *** this study,the m.terial of com.osition[K2 CuIIFeII(CN)6]was synthesized and its structural and electrochem.cal redox behavior was investigated with 5 different alkali insertion cations(Li^+,Na^+,K^+,Rb^+,Cs^+).Galvanostatic m.asurem.nts indicate that the redox potential strongly depends on the ionic radius of the inserted *** redox potential varies by 400 m.V between using Li^+(0.79A)or Cs^+(1.73A)in the *** underlying m.dification of the Fe2^+/Fe3^+redox potential in PBA is proposed to be due to the weakening of the Fe–C bond in the *** hypothesis is supported by XRD m.asurem.nts which reveal that the lattice param.ter of the de-intercalated host structure follows the sam. trend of m.notonic increase with the cation *** relatively m.nor volum. changes accom.anying the redox(1.2%–2.4%)allow the PBA to accom.odate differently sized cations,although the structural hindrances are quite pronounced at high c-rates for the larger ones(Rb^+and Cs^+).Cycle aging studies indicate that the m.nim.m.capacity fade rate is observed in case of K^+ and Rb^+ containing *** peak intensity corresponding to the[220]crystallographic plane varies depending on the state of charge of PBA,since this plane contains the insertion *** to the sensitivity of the redox potential to the insertion cation coupled with the observed fast ion-exchange ability,the PBA m.terial m.y find additional analytical applications such as ion sensing or filtration devices.

关键词： Prussian blue Cathode Alkali cations XRD Batteries

Hazards and Landscape Changes(Degradations) on Hungarian Karst m.untains Due to Natural and Hum.n Effects

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Journal of m.untain Science 2013年第1期10卷 16-28页

作者： m.ga JNOS Kiss KLAUDIA Szabó m.riA Kériné Borsodi ANDREA Kéri ANDRS m.ri LSZLó Knáb m.NIKA Iván VERONIKA Geography and Earth Science Institute Etvs Loránd University Biology Institute Etvs Loránd University

In order to study the karstological processes within the karst ecological system.the geohazards and degradation of karst landscapes on the karst areas of the Bakony m.untains(Hungary),we investigated the abiotic elem.nts of the environm.nt,soil and cover deposits,erosion soil decay;the changes in the quantity and quality of karst waters:contam.nation at swallow holes,contam.nation of karst springs;and the biogenic factors:surface vegetation coverage by the corine land cover m.thod,plant-ecological exam.nations,qualification of surface waters with the help of biological water *** recognized that the increasing hum.n activities during the past few centuries have had significant im.act on the investigated landscapes of karst areas because of their spatial *** the scope of our research we concluded that the landscape changes due to natural and hum.n effects can vary strongly on the different karst *** differences can arise from.the clim.tic and geom.rphologic situation,the coverlayer's qualities,etc.,but prim.rily from.the different utilization of the investigated karst areas(*** intensity,characteristics and territorial extension of utilization).On the spot investigation we detected traces of new and fast geom.rphological processes(gully form.tion,landslides,collapses,new sinkhole developm.nt) and landform.(sinkholes,gullies,swallow holes),which are clear evidences of the effect of clim.tic changes.

关键词： Karst landscape Geological hazards Soil erosion Lim.stone m.untain

Contribution of TLR signaling to the pathogenesis of colitisassociated cancer in inflam.atory bowel disease

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World Journal of Gastroenterology 2014年第36期20卷 12713-12721页

作者： Ferenc Sipos István Fri m.klós Constantinovits Zsolt Tulassay Gyrgyi m.zes 2nd Departm.nt of Internal m.dicine Semmelweis University 1088 Budapest Hungary m.lecular m.dicine Research Unit Hungarian Academy of Sciences 1088 Budapest Hungary

In the intestine a balance between proinflam.atory and repair signals of the im.une system.is essential for the m.intenance of intestinal hom.ostasis. The innate im.unity ensures a prim.ry host response to m.crobial invasion, which induces an inflam.atory process to localize the infection and prevent system.c dissem.nation of pathogens. The key elem.nts of this process are the germ.ine encoded pattern recognition receptors including Toll-like receptors (TLRs). If pathogens cannot be elim.nated, they m.y elicit chronic inflam.ation, which m.y be partly m.diated via TLRs. Additionally, chronic inflam.ation has long been suggested to trigger tissue tum.rous transform.tion. Inflam.ation, the seventh hallm.rk of cancer, m.y affect all phases of tum.r developm.nt, and evade the im.une system. Inflam.ation acts as a cellular stressor and m.y trigger DNA dam.ge or genetic instability. Furtherm.re, chronic inflam.ation can provoke genetic m.tations and epigenetic m.chanism. that prom.te m.lignant cell transform.tion. Colorectal cancers in inflam.atory bowel disease patients are considered typical exam.les of inflam.ation-related cancers. Although data regarding the role of TLRs in the pathom.chanism.of cancer-associated colitis are rather conflicting, functionally these m.lecules can be classified as ”largely antitum.rigenic” and ”largely pro-tum.rigenic” with the caveat that the underlying signaling pathways are m.inly context (i.e., organ-, tissue-, cell-) and ligand-dependent.

关键词： Inflam.ation Tissue repair Im.unoregulation Colitis-associated cancer Toll-like receptor Inflam.atory bowel disease Carcinogenesis