Abstract: Disclosed are certain fluorinated derivatives of Meldrum's acid as novel compounds, preparation methods for the same, their use in Li ion batteries, Li air batteries and Li sulphur batteries as well as solvent compositions, electrolyte compositions and respective batteries containing them.

Abstract: The present invention relates to a battery pack capable of discharging gases in a pouch type battery cell when a gas pressure inside the pouch type battery cell is increased over a reference pressure, the battery pack including: a plurality of pouch type battery cells; a case comprising partitions suppressing the pouch type battery cells from expanding in a thickness direction thereof, wherein the pouch type battery cells are respectively held in spaces defined by the partitions; and a punching unit installed on the case to pierce a portion of surfaces of the pouch type battery cells, which is not supported by the partition, and having pin members of which number is equal to that of the pouch type battery cells.

Abstract: Disclosed herein is a silicon-based anode active material, comprising a silicon phase, a SiOx (0<x<2) phase and a carbon dioxide phase. Also disclosed is a secondary battery, which comprises a cathode comprising a cathode active material, an anode active material comprising an anode active material, and a separator, wherein the anode active material comprises a silicon phase, an SiOx (0<x<2) phase and a silicon dioxide phase.

Abstract: A battery cell assembly having a battery cell and a thin profile sensor is provided. The battery cell has a housing and first and second electrical terminals extending therefrom. The thin profile sensor has a flexible plastic sheet, a microprocessor, and a sensing circuit. The microprocessor and the sensing circuit are coupled to the flexible plastic sheet. The flexible plastic sheet is coupled to an exterior surface of the housing of the battery cell. The sensing circuit generates a signal that is indicative of an operational parameter value of the battery cell. The microprocessor determines the operational parameter value based on the signal from the sensing circuit.

Abstract: A method for manufacturing a positive active material for a nonaqueous electrolyte secondary battery having both thermal stability and charge-discharge capacity at a high level as well as excellent cycle characteristics. The method for manufacturing a positive active material for a nonaqueous electrolyte secondary battery includes: a step of adding a niobium salt solution and an acid simultaneously to a slurry of a nickel-containing hydroxide, and controlling the pH of the slurry at between 7 and 11 on a 25° C. basis to obtain a nickel-containing hydroxide coated with a niobium compound; a step of mixing the nickel-containing hydroxide coated with the niobium compound with a lithium compound to obtain a lithium mixture; and a step of firing the lithium mixture in an oxidizing atmosphere at 700° C. to 830° C. to obtain a lithium-transition metal composite oxide.

Abstract: Provided are a method of preparing iron oxide nanoparticles, iron oxide nanoparticles prepared thereby, and an anode material including the iron oxide nanoparticles.

Abstract: A non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte, which further contains a combination of a nitrile compound and an S?O group-containing compound (or a dinitrile compound) in an amount of 0.001 to 10 wt. % imparts improved cycle performance and storage property to a lithium battery, particularly a lithium secondary battery.

Abstract: The present invention relates to an anode active material for a lithium secondary battery, comprising a carbon material, and a coating layer formed on the surface of particles of the carbon material and having a plurality of Sn-based domains having an average diameter of 1 ?m or less. The inventive anode active material having a Sn-based domains coating layer on the surface of a carbon material can surprisingly prevent stress due to volume expansion which generates by an alloy of Sn and lithium. Also, the inventive method for preparing an anode active material can easily control the thickness of the coating layer.

Abstract: A fuel cell stack preventing deterioration of an end cell, which has a structure for preventing cooling of a neighbor cell adjacent to a closed end plate, is provided. To this end, an open end plate and a closed end plate, which are provided on a first side and a second side, respectively, of the fuel cell stack, fasten a plurality of working cells together. More specifically, a hollow flow space is formed in an inner wall of the closed end plate to form an air pocket therein.

Abstract: A fuel cell system capable of adjusting the amount of humidification of reaction gas includes a fuel cell stack in which fuel cells are stacked, an air supplier supplying air to the fuel cell stack, a humidifier humidifying air supplied through the air supplier with air discharged from the fuel cell stack, and a hydrogen supplier supplying hydrogen to the fuel cell stack. A condensate water processor is configured to store and discharge condensate water discharged from the fuel cell stack through a hydrogen exhaust line. A drain line connects an air exhaust line and the hydrogen exhaust line of the fuel cell stack. A water trap is installed in the drain line and stores the condensate water. A water reservoir is installed at a connection point connecting the drain line and the air exhaust line and stores condensate water discharged from the water trap.

Abstract: An organic electrolyte solution including a metal-ligand coordination compound, wherein the ligand is an organic phosphate compound.

Abstract: An electrode assembly according to an embodiment of the present invention includes a first electrode plate having a fist electrode tab at an end of one side thereof, a second electrode plate having a second electrode tab, which is formed in a same direction as a longitudinal direction of the first electrode tab and is formed at a position not overlapping the first electrode tab, and a protrusion which is formed at a position overlapping the first electrode tab, and a separator insulating the first electrode plate and the second electrode plate. Therefore, the electrode assembly according to the embodiment of the present invention and the secondary battery including the same may improve the stability of the secondary battery by preventing lithium ion accumulation in a separator.

Abstract: An anode/cathode system is disclosed for use in a Benthic microbial fuel cell. Carbon cloth forms at least a portion of the anode and is disposed on one side of a water oxygen impermeable layer, which can be weighted around a periphery thereof to hold the anode against a water-sediment interface. Carbon cloth flaps or strands can be attached to the other side of the impermeable layer to form the cathode. The anode and cathode can be divided into sections with each section having an electrical lead coupled thereto. The system is deployed onto the seafloor with the anode side in contact with the water-sediment interface.

Abstract: A secondary battery including an electrode assembly; a case accommodating the electrode assembly; a cap plate sealing the case; a terminal plate on the cap plate; a current collecting terminal penetrating through the cap plate and the terminal plate, the current collecting terminal being coupled with a top surface of the terminal plate and being electrically connected to the electrode assembly; and a reinforcing plate coupled with a bottom surface of the terminal plate to face the terminal plate.

Abstract: An object is to supply a sufficient amount of air to a fuel cell stack in a fuel cell vehicle when the fuel cell stack is mounted below a floor, the fuel cell stack configured to draw in air through an intake duct and discharge air to the exterior through an exhaust duct. An air introduction surface (26) faces upward or downward in a vehicle upper and lower direction, an intake passage portion (30) of the intake duct (28) extends along the air introduction surface (26) and vertical walls (31, 32) of left and right end portions of the fuel cell stack (11) while a pair of air introduction ports (33, 34) opens in left and right end portions of the intake passage portion (30), and an exhaust passage portion (39) of the exhaust duct (29) extends along an air discharge surface (27) and vertical walls (40, 41) of front and rear end portions of the fuel cell stack (11) while a pair of air discharge ports (42, 43) opens in front and rear end portions of the exhaust passage portion (39).

Abstract: An electrolytic coin cell that has been used to study the growth of lithium dendrites by optical observation is described. The cell makes possible observation of the growth of the dendrites in response to various applied conditions, such as applied electrical signals, chemical effects, and temporal effects in a real coin cell geometry.

Abstract: A rechargeable battery includes an electrode assembly in a battery case, and a buffer sheet between the electrode assembly and the battery case, the buffer sheet contacting the electrode assembly and the battery case.

Abstract: The invention relates to copolymers comprising a chain of siloxane repeat units of at least two different types, a first type of siloxane repeat unit comprising at least one —OH group on the silicon atom of the siloxane repeat unit and a second type of repeat unit comprising at least one pendant chain on the silicon atom of said repeat unit, this pendant chain consisting of a polymer chain comprising a chain of repeat units carrying at least one group of formula —PO3R1R2 wherein R1 and R2 independently represent a hydrogen atom, an alkyl group or a cation.

Abstract: A rechargeable battery includes an electrode assembly for performing charging and discharging operations, a case accommodating the electrode assembly, a cap plate coupled to an opening of the case, an electrode terminal installed on the cap plate, and a lead tab connecting the electrode assembly to the electrode terminal, the lead tab including a terminal connection part connected to the electrode terminal, and a current-collecting connection part connected to the electrode assembly, the current-collecting connection part including a welding portion connected to the electrode assembly, and an absorption portion separated from the welding portion in a first direction parallel to the cap plate and provided on an outer side of the welding portion.

Abstract: A battery pack includes at least one battery module provided with a plurality of battery cells each having a vent that discharges gas, the battery cells being arranged in one direction, and a housing accommodating the battery module, the housing including an inlet and an outlet for air, and an inlet opening and closing device disposed in the inlet.