Abstract: The exemplary embodiment has an object to provide a nonaqueous electrolyte solution having a flame retardancy over a long period and having a good capacity maintenance rate. The exemplary embodiment is a nonaqueous electrolyte solution containing a lithium salt, at least one oxo-acid ester derivative of phosphorus selected from compounds represented by a predetermined formula, and at least one disulfonate ester selected from a cyclic disulfonate ester and a linear disulfonate ester represented by the predetermined formulae.

Abstract: Provided is an electrolyte solution capable of further increasing the output of a lithium air battery, the electrolyte solution for a lithium air battery having a total bonding strength between Li2O2 is no less than 0.14.

Abstract: A negative electrode material for a lithium ion battery, in which a fine particle (A) containing an element selected from Si, Sn, Ge and In and a carbon particle (B) obtained by heat-treating a petroleum-based coke and/or a coal-based coke at a temperature of 2,500° C. or more are connected through a chemical bond such as urethane bond, urea bond, siloxane bond and ester bond. Also disclosed are a negative electrode sheet obtained by coating a current collector with a paste containing the negative electrode material, a binder and a solvent, and then drying and pressure-forming the paste; and a lithium ion battery incorporating the negative electrode sheet.

Abstract: Provided are a non-aqueous electrolyte liquid for a secondary battery, which has excellent lithium ion conductibility and voltage resistance and is suitably used in a lithium secondary battery, and a high output power lithium secondary battery containing this non-aqueous electrolyte liquid for a secondary battery. Disclosed is a non-aqueous electrolyte liquid for a secondary battery containing a metal salt containing an ion of a metal which belongs to Group 1 or Group 2 of the Periodic Table of Elements, and at least one selected from the group consisting of silicon compounds represented by the following formula (1) or formula (2).

Abstract: A lithium secondary battery comprising a positive electrode, a negative electrode, a separator inserted between the positive electrode and the negative electrode and a non-aqueous electrolyte is provided. The positive electrode comprises a first positive electrode active material represented by following Chemical Formula 1. And the non-aqueous electrolyte comprises a first lithium salt, a second lithium salt represented by following Chemical Formula 2 and a non-aqueous organic solvent. LixMyOz??[Chemical Formula 1] Li+RCOO???[Chemical Formula 2] (In Chemical Formulae 1 and 2, M=NiaMnbCoc, in which 0<a<2, 0<b<2, 0<c<2, a+b+c=1 or 2, 0.5?x?1.3, 1<x+y?3.3, 2?z?4, and R is independently a C1-C10 alkyl group, a C6-C12 aryl group, a C2-C5 alkenyl group, a halogen substituted C1-C10 alkyl group, a halogen substituted C6-C12 aryl group or a halogen substituted C2-C5 alkenyl group).

Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode contains a lithium composite oxide. The negative electrode contains a material including at least one of silicon Si and tin Sn as a constituent element. The lithium composite oxide includes lithium Li having a composition ratio a, a first element having a composition ratio b, and a second element having a composition ratio c as a constituent element. The first element including two kinds or more selected from among manganese Mn, nickel Ni, and cobalt Co, and including at least manganese. The second element including at least one kind selected from among aluminum Al, titanium Ti, magnesium Mg, and boron B. The composition ratios a to c satisfy the relationships of 1.1<a<1.3, 0.7<b+c<1.1, 0<c<0.1, and a>b+c.

Abstract: A composite electrode includes a mixture of active matter (AM) particles and EC material particles generating an electronic conductivity, the mixture being supported by an electrical lead forming a DC current collector. The electrode can be manufactured by a method which consists of modifying the AM particles and the EC particles so as to react with each other and with the material of the collector in order to form covalent and electrostatic bonds between said particles, as well as between the particles and the current collector, and then placing the different constituents in contact.

Abstract: The present invention provides a method for manufacturing a composite separator for a polymer electrolyte membrane fuel cell. The method comprises: preparing a prepreg as a continuous carbon fiber-reinforced composite and a graphite foil; allowing the cut prepreg and graphite foil to pass through a stacking/compression roller to be compressed; allowing the prepreg in which the graphite foil is integrally stacked to be heated and pressed by a hot press such that hydrogen, air, and coolant flow fields are formed or to pass through a hot roller to be formed into a separator; removing unnecessary portions from the heated and pressed separator using a trim cutter; and post-curing the thus formed separator, wherein the graphite foil may be stacked on the prepreg as the continuous carbon fiber-reinforced composite such that a graphite layer is integrally formed with the prepreg.

Abstract: The invention relates to a diazonium aryl salt devoid of hydroxyl functions of the following general formula (1): X?+N?N-A-R1—(OR2)n—O—R4-A?-N?N+X???(1) in which: n is in a range of from 1 to 10, preferably from 1 to 4, X? represents a counter-ion of the diazonium cation selected from the group consisting of halogenides, BF4—, NO3—, HSO4—, PF6—, CH3COO—, N(SO2CF3)2—, CF3SO3—, CH3SO3—, CF3COO—, (CH3O)(H)PO2—, and N(CN)2—; R1, R2 and R4 are identical or different and are independently selected from the group consisting of —CH2—, a cyclic alkyl group, an acyclic alkyl group, a linear alkyl group, and a branched alkyl group; and A and A? are identical or different and independently represent a mono or polycyclic, aromatic hydrocarbonated group chosen from the group formed by phenyl, aryl groups, condensed polyaromatic groups, which may be substituted.

Abstract: A non-aqueous liquid electrolyte suitable for use in a non-aqueous liquid electrolyte secondary battery comprising a negative electrode and a positive electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte, the negative electrode containing a negative-electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom, wherein the non-aqueous liquid electrolyte comprises a carbonate having at least either an unsaturated bond or a halogen atom.

Abstract: Disclosed is a liquid electrolyte for a lithium accumulator and the use thereof in a lithium accumulator at low temperature. The liquid electrolyte includes at least one lithium salt dissolved in a mixture of non-aqueous organic solvents. The mixture of organic solvents is formed by propylene carbonate (PC), ?-butyrolactone (GBL) and ethyl methyl carbonate (EMC). The mixture of organic solvents preferably contains between: 0.5% and 33% in volume of propylene carbonate, 0.5% and 33% in volume of ?-butyrolactone and, 0.5% and 99% in volume of ethyl methyl carbonate, the sum of the respective volume percentages of propylene carbonate, ?-butyrolactone, and ethyl methyl carbonate in the mixture being equal to 100%.

Abstract: A lithium air battery including a negative electrode comprising lithium, a positive electrode using oxygen as a positive active material, and an organic electrolyte including an organic compound capable of intercalating and deintercalating electrons involved in an electrochemical reaction.

Abstract: A method of forming a fuel cell stack, wherein the stack includes an anode electrode layer, an adhesive and anode gas diffusion layer coupled to the anode electrode layer, an ion exchange membrane coupled on a first side to the gas diffusion layer opposite the anode electrode layer, an adhesive and cathode gas diffusion layer coupled to a second side of the ion exchange membrane, and a cathode electrode layer coupled to the adhesive and cathode gas diffusion layer opposite the ion exchange membrane. The fuel cell stack may be flexible.

Abstract: A compound of formula Lia+y(M1(1?t)Mot)2M2b(O1?xF2x)c wherein: M1 is selected from the group consisting in Ni, Mn, Co, Fe, V or a mixture thereof; M2 is selected from the group consisting in B, Al, Si, P, Ti, Mo; with 4?a?6; 0<b?1.8; 3.8?c?14; 0?x<1; ?0.5?y?0.5; 0?t?0.9; b/a<0.45; the coefficient c satisfying one of the following relationships: c=4+y/2+z+2t+1.5b if M2 is selected from B and Al; c=4+y/2+z+2t+2b if M2 is selected from Si, Ti and Mo; c=4+y/2+z+2t+2.5b if M2 is P; with z=0 if M1 is selected from Ni, Mn, Co, Fe and z=1 if M1 is V.

Abstract: A polyimide blend nanofiber and its use in battery separator are disclosed. The polyimide blend nanofiber is made of two kinds of polyimide precursors by high pressure electrostatic spinning and then high temperature imidization processing, wherein one of the polyimide precursor does not melt under high temperature, and the other is meltable at a temperature of 300-400° C. The polyimide blend nanofiber of present invention has high temperature-resistance, high chemical stability, high porosity, good mechanical strength and good permeability, and can be applied as battery separator.

Abstract: The present invention relates to a battery pack in which a plurality of unit modules consisting of battery cells are stacked, adjacently or in regular intervals, and electrode tabs are connected in series, and more specifically, to a battery pack including an overcurrent protector capable of preventing damage to each battery cell caused by a battery cell short circuit or overcurrent which flows in from a protection circuit by: connecting positive and negative electrode tabs of the battery cell with a voltage sensing line in order to sense the voltage of each battery cell; and installing a fuse in a connector which is arranged between the battery cell and the voltage sensing line and couples electrode tabs.

Abstract: An electrolyte solution for a rechargeable lithium battery that includes a lithium salt; a non-aqueous organic solvent including ethyl acetate; and an additive including a sultone-based compound, wherein the sultone-based compound is included in an amount ranging from 0.1 to 5 wt % based on the total amount of the electrolyte solution is provided.

Abstract: High capacity silicon based anode active materials are described for lithium ion batteries. These materials are shown to be effective in combination with high capacity lithium rich cathode active materials. Supplemental lithium is shown to improve the cycling performance and reduce irreversible capacity loss for at least certain silicon based active materials. In particular silicon based active materials can be formed in composites with electrically conductive coatings, such as pyrolytic carbon coatings or metal coatings, and composites can also be formed with other electrically conductive carbon components, such as carbon nanofibers and carbon nanoparticles. Additional alloys with silicon are explored.

Abstract: An ultrafine fiber-based composite separator comprising a fibrous porous body which comprises ultrafine metal oxide/polymer composite fibers, or ultrafine metal oxide fibers and a polymer resin coating layer formed on the surface thereof, the ultrafine fibers being continuously randomly arranged and layered, and obtained by electrospinning a metal oxide precursor sol-gel solution or a mixture of a metal oxide precursor sol-gel solution and a polymer resin solution, wherein the surface of the metal oxide/polymer composite fibers has a uniform mixing composition of the metal oxide and the polymer resin, in which the separator has a heat shrinkage rate at 150˜250° C. of 10% or less and does not break down due to melting at a temperature of 200° C. or lower, has low heat shrinkage rate, and superior heat resistance and ionic conductivity, being capable of providing improved cycle and power properties when used in manufacturing a battery.

Abstract: A system has: a stack having anodes supplied with anode fluid and cathodes supplied with cathode fluid; an evaporating portion generating steam by evaporating water; a water deliverer delivering the water to the evaporating portion; and a reforming portion producing the anode fluid through steam-reforming on fuel using the steam generated by the evaporating portion. A controller executes a determination process that determines whether an open circuit voltage of the stack increases while the water is temporarily fed to the evaporating portion, when the stack is restarted from a state where power generation of the stack is suspended but the temperature of the evaporating portion is a reference temperature being capable of generating steam, and if the open circuit voltage has increased or is on an increase, the controller executes a restart process for resuming the power generation of the stack.