Abstract: The electrode for a fuel cell of the invention includes: an electrode substrate; and a catalyst layer having a filler layer formed on the surface of the electrode substrate and a catalyst coating the filler layer.

Abstract: A polymer membrane for a fuel cell includes a porous polymer substrate, and a crosslinked polymer layer having a proton-conductive functional group coated on at least one side of the porous polymer substrate. A method of preparing the polymer membrane includes: (1) providing a coating composition that includes a monomer or a prepolymer having the proton-conductive functional group and a crosslinking catalyst; (2) coating the coating composition on the at least one side of the porous polymer substrate; and (3) crosslinking the monomer or the prepolymer coated on the porous polymer substrate.

Abstract: The present invention relates to an electrode for a fuel cell which includes an electrode substrate composed of nano-carbon fiber, with a catalyst layer formed on the electrode substrate. The electrode substrate has a better strength than an electrode substrate composed of a conventional carbonaceous material, and a pore size which can be controlled even though the composition for forming the catalyst layer may be coated in the form of a slurry.

Abstract: A polymer membrane-electrode assembly for a fuel cell includes an anode and a cathode, each of the anode and the cathode including a catalyst layer and an electrode substrate; and a polymer membrane placed between the anode and cathode. In the polymer membrane-electrode assembly, the polymer membrane is a polyphenylene vinylene-based polymer having a proton conductive functional group in a side chain of the polyphenylene vinylene-based polymer.

Abstract: Disclosed is an electrolyte of a lithium secondary battery comprising a lithium salt, an organic solvent, and at least one additive compound selected from the group consisting of compounds represented by the following formula (1) and derivatives thereof: where R1 is selected from the group consisting of hydrogen radicals, alkyls, aryls, cycloalkyls, alkenyls, alkynyls, ester radicals, and aliphatic carbonate radicals. The electrolyte improves both swelling inhibition properties at high temperature and capacity characteristics of a lithium secondary battery.

Abstract: Disclosed is an electrolyte of a lithium secondary battery comprising a lithium salt, an organic solvent, and at least one additive compound selected from the group consisting of compounds represented by the following formula (1) and derivatives thereof: where R1 is selected from the group consisting of hydrogen radicals, alkyls, aryls, cycloalkyls, alkenyls, alkynyls, ester radicals, and aliphatic carbonate radicals. The electrolyte improves both swelling inhibition properties at high temperature and capacity characteristics of a lithium secondary battery.

Abstract: Disclosed is an electrolyte of a lithium secondary battery comprising a lithium salt, an organic solvent, and at least one additive compound selected from the group consisting of compounds represented by the following formula (1) and derivatives thereof: where R1 is selected from the group consisting of hydrogen radicals, alkyls aryls, cycloalkyls, alkenyls, alkynyls, ester radicals, and aliphatic carbonate radicals. The electrolyte improves both swelling inhibition properties at high temperature and capacity characteristics of a lithium secondary battery.

Abstract: The present invention relates to an electrode for a fuel cell which includes an electrode substrate composed of nano-carbon fiber, with a catalyst layer formed on the electrode substrate. The electrode substrate has a better strength than an electrode substrate composed of a conventional carbonaceous material, and a pore size which can be controlled even though the composition for forming the catalyst layer may be coated in the form of a slurry.

Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including a non-aqueous organic solvent, a lithium salt, and a lactam-based compound selected from the group consisting of compounds represented by formulas 1 to 6: where R is a H radical, a C2 to C6 alkenyl or a halogen radical; and K, T, X, Y and Z are identically or independently H radicals or halogen radicals.

Abstract: A polymeric sol electrolyte including a sol-forming polymer and an electrolytic solution consisting of a lithium salt and an organic solvent. Use of the polymeric sol electrolyte allows problems such as swelling or leakage to be overcome, compared to the case of using a liquid-type electrolytic solution. Also, the polymeric sol electrolyte has better ionic conductivity than a polymeric gel electrolyte. In addition, when the lithium battery according to the present invention is overcharged at 4.2 V or higher, an electrochemically polymerizable material existing in the polymeric sol electrolyte is subjected to polymerization to prevent heat runaway, which simplifies a separate protection circuit, leading to a reduction in manufacturing cost.

Abstract: A polymer membrane-electrode assembly for a fuel cell includes an anode and a cathode, each of the anode and the cathode including a catalyst layer and an electrode substrate; and a polymer membrane placed between the anode and cathode. In the polymer membrane-electrode assembly, the polymer membrane is a polyphenylene vinylene-based polymer having a proton conductive functional group in a side chain of the polyphenylene vinylene-based polymer.

Abstract: A polymer membrane for a fuel cell includes a porous polymer substrate, and a crosslinked polymer layer having a proton-conductive functional group coated on at least one side of the porous polymer substrate. A method of preparing the polymer membrane includes: (1) providing a coating composition that includes a monomer or a prepolymer having the proton-conductive functional group and a crosslinking catalyst; (2) coating the coating composition on the at least one side of the porous polymer substrate; and (3) crosslinking the monomer or the prepolymer coated on the porous polymer substrate.

Abstract: Provided are an electrolyte membrane for a fuel cell and a fuel cell including the same. The electrolyte membrane for a fuel cell includes a proton conductive polymer layer and hygroscopic polymer layers placed on one side or on both sides of the proton conductive polymer layer. The electrolyte membrane has excellent hygroscopic properties and can be used for a self-humidifying fuel cell.

Abstract: Provided are a fuel cell and a preparation method thereof. The fuel cell includes unit cells, each having a membrane electrode assembly, separators placed on either side of the membrane electrode assembly, and spacers at the edge of and between the membrane electrode assembly and the separators, wherein each spacer is adhered by an adhesive to a separator, or to a membrane electrode assembly and a separator. The use of spacers with adhesive in a fuel cell according to the present invention provides excellent airtight sealing of the fuel and oxidant gas of the fuel cell.

Abstract: The electrode for a fuel cell of the invention includes: an electrode substrate; and a catalyst layer having a filler layer formed on the surface of the electrode substrate and a catalyst coating the filler layer.

Abstract: A positive active material for rechargeable lithium batteries includes an active material component processed from a manganese-based compound. The transition metal compound is selected from LixMnO2, LixMnF2, LixMnS2, LixMnO2-zFz, LixMnO2-zSz, LixMn1-yMyO2, LixMn1-yMyF2, LixMn1-yMyS2, LixMn1-yMyO2-zFz, LixMn1-yMyO2-zSz, LixMn2O4, LixMn2F4, LixMn2O4-zFz, LixMn2O4-zSz, LixMn2-yMyO4, LixMn2-yMyF4, LixMn2-yMyS4, LixMn2-yMyO4-zFz, or LixMn2-yMyO4-zSz where 0<x?1.5, 0.05?y?0.3, z?1.0 and M is selected from Al, Co, Cr, Mg, Fe or La. A metallic oxide is coated on the active material component.

Abstract: A positive active material for rechargeable lithium batteries includes an active material component processed from a manganese-based compound. The transition metal compound is selected from LixMnO2, LixMnF2, LixMnS2, LixMnO2-zFz, LixMnO2-zSz, LixMn1-yMyO2, LixMn1-yMyF2, LixMn1-yMyS2, LixMn1-yMyO2-zFz, LixMn1-yO2-zSz, LixMn2O4, LixMn2F4, LixMn2S4, LixMn2O4-zFz, LixMn2O4-zSz, LixMn2-yMyO4, LixMn2-yMyF4, LixMn2-yMyS4, LixMn2-yMyO4-zFz, or LixMn2-yMyO4-zSz where 0<x?1.5, 0.05?y?0.3, z?1.0 and M is selected from Al, Co, Cr, Mg, Fe or La. A metallic oxide is coated on the active material component.

Abstract: Disclosed is an electrolyte of a lithium secondary battery comprising a lithium salt, an organic solvent, and at least one additive compound selected from the group consisting of compounds represented by the following formula (1) and derivatives thereof: 1

Abstract: Disclosed is an electrolyte for a rechargeable lithium battery including a non-aqueous organic solvent, a lithium salt, and a lactam-based compound selected from the group consisting of compounds represented by formulas 1 to 6: 1

Abstract: A lithium battery including an electrode assembly having a cathode, an anode, a separator interposed between the cathode and the anode, a gel electrolyte prepared by dissolving a terpolymer having a repeating unit represented by formula (1), a repeating unit represented by formula (2) and a repeating unit represented by formula (3) in an organic solvent having a low boiling point, mixing a lithium salt and organic solvent therewith to obtain a composition for forming an electrolyte, injecting the composition into a case accommodating the electrode assembly or coating on at least one of the cathode, the anode and the separator, and then removing the low boiling point organic solvent from the resultant structure, and the pouch accommodating the electrode assembly and the gel electrolyte: wherein n is an integer from 1 to 12 and R is an alkyl having 1 to 12 carbon atoms.