Abstract: A fuel processor and a fuel cell system which have a desulfurizer with multiple sensors, and a method of measuring an adsorbent state in of an adsorbent the desulfurizer. The desulfurizer determines the saturation state of the adsorbent using a signal difference between at least two sensors installed adjacent to an inlet and an outlet of the desulfurizer. The desulfurizer provides an accurate determination of the saturation of the adsorbent, and can be used to determine when the adsorbent should be changed. Two desulfurizers can be alternatively used to allow for a consistent fuel flow.

Abstract: A passive cooling system for a fuel cell stack is provided. The passive cooling system includes a plurality of cooling plates, each installed between every few unit cells, each having flow channels for flowing a primary coolant on at least one surface, and each comprising an inlet hole through which the primary coolant enters and an outlet hole through which the primary coolant that has passed the flow channels leaves; and a heat exchanger installed on a primary coolant flow line connected from the outlet holes to the inlet holes of the cooling plates to change a vapor state primary coolant to a liquid state primary coolant by cooling the primary coolant, wherein a path through which the primary coolant passes is a closed circuit, and the flow of the primary coolant is achieved by natural convection caused by vaporization of the primary coolant.

Abstract: A liquid fuel cartridge having a bistable structure includes a housing, a storage unit that is placed in the housing and stores a liquid fuel, a fuel outlet that is connected to an end of the storage unit and extends to an outside of the housing, a bistable structure that is connected to the storage unit and shows bistable states of a full state and an exhausted state thereof, and a window through which the bistable states of the bistable structure is detected.

Abstract: Provided is a liquid-gas separator of a direct liquid feed fuel cell. The liquid-gas separator includes an empty ball shaped main body; a gas extraction membrane which is attached to an opening formed in the main body, and selectively extracts gas from the main body; an inlet which is formed in the main body and guides the liquid and gas into the main body; an outlet which is formed on the main body and guides the liquid to the outside of the main body; and a flexible tube having a hollow structure, one end of which is connected to the outlet and the other end of which is immersed in the liquid fuel.

Abstract: A passive cooling system for a fuel cell stack is provided. The passive cooling system includes a plurality of cooling plates, each installed between every few unit cells, each having flow channels for flowing a primary coolant on at least one surface, and each comprising an inlet hole through which the primary coolant enters and an outlet hole through which the primary coolant that has passed the flow channels leaves; and a heat exchanger installed on a primary coolant flow line connected from the outlet holes to the inlet holes of the cooling plates to change a vapor state primary coolant to a liquid state primary coolant by cooling the primary coolant, wherein a path through which the primary coolant passes is a closed circuit, and the flow of the primary coolant is achieved by natural convection caused by vaporization of the primary coolant.

Abstract: A fuel processor and a fuel cell system which have a desulfurizer with multiple sensors, and a method of measuring an adsorbent state in of an adsorbent the desulfurizer The desulfurizer determines the saturation state of the adsorbent using a signal difference between at least two sensors installed adjacent to an inlet and an outlet of the desulfurizer. The desulfurizer provides an accurate determination of the saturation of the adsorbent, and can be used to determine when the adsorbent should be changed. Two desulfurizers can be alternatively used to allow for a consistent fuel flow.

Abstract: Provided is a liquid-gas separator of a direct liquid feed fuel cell. The liquid-gas separator includes an empty ball shaped main body; a gas extraction membrane which is attached to an opening formed in the main body, and selectively extracts gas from the main body; an inlet which is formed in the main body and guides the liquid and gas into the main body; an outlet which is formed on the main body and guides the liquid to the outside of the main body; and a flexible tube having a hollow structure, one end of which is connected to the outlet and the other end of which is immersed in the liquid fuel.

Abstract: A liquid fuel cartridge having a bistable structure includes a housing, a storage unit that is placed in the housing and stores a liquid fuel, a fuel outlet that is connected to an end of the storage unit and extends to an outside of the housing, a bistable structure that is connected to the storage unit and shows bistable states of a full state and an exhausted state thereof, and a window through which the bistable states of the bistable structure is detected.

Abstract: An organic electrolytic solution and a lithium secondary battery employing the same, wherein the organic electrolytic solution for a lithium secondary battery includes a polymer adsorbent having an ethylene oxide chain capable of being adsorbed into a lithium metal, a material capable of reacting with lithium to form a lithium alloy, a lithium salt, and an organic solvent. The organic electrolytic solution may be applied to all types of batteries including lithium ion batteries, lithium polymer batteries and lithium metal polymer batteries using a lithium metal for a negative electrode material, and the like. In particular, when the organic electrolytic solution is utilized in a lithium metal polymer battery, it serves to stabilize the lithium metal, and to increase the lithium ionic conductivity, thereby improving the cycle characteristics and charging/discharging efficiency of the battery.

Abstract: A separator of a fuel cell and a method of preparing the separator include improvements in processability and corrosion resistance. The separator of the fuel cell is made of a solid-state, amorphous alloy.

Abstract: A cathode active material and a lithium secondary battery employing the same are provided.

Abstract: A method for forming a lithium anode protective layer comprises activating the surface of the lithium metal anode and forming a LiF protective layer on the activated surface of the lithium metal anode.

Abstract: A method of preparing nanosized spherical vanadium oxide particles, comprising preparing a vanadium ion-containing aqueous solution by dissolving a vanadium ion-containing material; adding at least one solvent selected from a non-protonic, polar organic solvent and a glycol solvent to the vanadium ion-containing aqueous solution and mixing the same; and aging the mixture.

Abstract: The invention disclosed relates to a compound of molecular formula LixCryMn2−yO4+z, wherein 2.2<x<4, 0<y<2 and z≧0, and to the use of this compound as a cathode material in secondary lithium and lithium ion cells.

Abstract: Disclosed is a positive active material of for a rechargeable lithium battery and a method of preparing the same. The positive active material is represented by formula 1: LixMn2-a-bCraMbO4+z  [formula 1] where x≧2; 0.25<a<2; 0<b≦0.3; z≧0; M is an alkali earth metal, a transition metal or a mixture thereof. The method includes the steps of dissolving a chromium salt, a manganese salt, and a metal salt(s) in a solvent to produce a solution; performing a first heat-treatment step on the obtained solution at 400 to 500° C. to produce a chromium manganese metal oxide; mixing the chromium manganese metal oxide with a lithium salt; and performing a second heat-treatment step at 600 to 800° C.

Abstract: An organic electrolytic solution and a lithium secondary battery employing the same, wherein the organic electrolytic solution for a lithium secondary battery includes a polymer adsorbent having an ethylene oxide chain capable of being adsorbed into a lithium metal, a material capable of reacting with lithium to form a lithium alloy, a lithium salt, and an organic solvent. The organic electrolytic solution may be applied to all types of batteries including lithium ion batteries, lithium polymer batteries and lithium metal polymer batteries using a lithium metal for a negative electrode material, and the like. In particular, when the organic electrolytic solution is utilized in a lithium metal polymer battery, it serves to stabilize the lithium metal, and to increase the lithium ionic conductivity, thereby improving the cycle characteristics and charging/discharging efficiency of the battery.

Abstract: A method of preparing nanosized spherical vanadium oxide particles, comprising preparing a vanadium ion-containing aqueous solution by dissolving a vanadium ion-containing material; adding at least one solvent selected from a non-protonic, polar organic solvent and a glycol solvent to the vanadium ion-containing aqueous solution and mixing the same; and aging the mixture.

Abstract: A method for forming a lithium anode protective layer comprises activating the surface of the lithium metal anode and forming a LiF protective layer on the activated surface of the lithium metal anode.

Abstract: A cathode active material and a lithium secondary battery employing the same are provided.

Abstract: Disclosed is a positive active material of for a rechargeable lithium battery and a method of preparing the same.