Samsung Sdi Co., Inc.

Samsung Electronics Co., Ltd.

Industry-university Cooperation Foundation Hanyang University

Suk-gi Hong

Duck-young Yoo

Myung-jin Lee

Woo-sung Jeon

Tae-young Kim

Myung-dong Cho

Jung-ock Park

Pilsang Yun

Un-gyu Paik

Kyung-jung Kwon

Sangil Han

Ji-hoon Seo

Sang-Hyuk Suh

Ki-chun Kil

Tao-young Kim

A composite cathode active material for an all-solid-state battery including a sulfide solid electrolyte, a preparation method thereof, a cathode layer for an all-solid-state battery, and an all-solid-state battery including the cathode layer, the composite cathode active material including a secondary particle including a plurality of primary particles; and a buffer layer on a surface of the secondary particle, wherein the secondary particle includes a nickel lithium transition metal oxide represented by Formula 1 (LiNiMO), the buffer layer includes a first buffer layer adjacent to a surface of the secondary particle and including an oxide represented by Formula 2 (LiAO); and a second buffer layer including an oxide represented by Formula 3 (LiEO).

Composite cathode active material for all-solid-state battery, preparation method thereof, cathode layer for all-solid-state battery, and all-solid-state battery including the cathode layer

A membrane electrode assembly for a fuel cell and a fuel cell employing the same. The membrane electrode assembly includes: a cathode; an anode; and a polymer electrolyte membrane that is interposed between the cathode and the anode, and comprises a proton conductive polymer that is doped with acid to a doping level of less than 200 mole %. The membrane electrode assembly for the fuel cell exhibits an improved efficiency of performance when acid is doped in the polymer electrolyte membrane at a doping level of less than 200 mole. In addition, the performance of the fuel cell can be optimized by separately adjusting the amount of acid doped in the cathode and anode. The fuel cell employing the membrane electrode assembly can be operated at a high temperature in a dry environment and exhibits an improved power generating performance.

Membrane electrode assembly for fuel cell and fuel cell employing the same

A solid proton conductor for a fuel cell and a fuel cell employing the solid proton conductor, the solid proton conductor including a sulfonated polymer, and a hydrophilic polymer having an acid group, constituting a polymer solvent, providing a proton mobile path.

Solid proton conductor for fuel cell and fuel cell using the same

An oxygen reduction electrode and a fuel cell including the same are provided. A catalyst layer of the oxygen reduction electrode includes a metalloporphyrin derivative as an additive. Accordingly, the oxygen reduction electrode can increase oxygen concentration and can easily form a triple phase boundary by reducing a flooding phenomenon caused by an electrolyte. A fuel cell including the same is also provided.

Oxygen reduction electrode and fuel cell including the same

A method for preparing a metal catalyst includes a proton conductive material coating layer formed on the surface of a conductive material. Also, an electrode may be prepared using the metal catalyst. The method for preparing the metal catalyst comprises mixing the conductive catalyst material, the proton conductive material, and a first solvent, casting the mixture onto a supporting layer and drying the mixture to form a conductive catalyst containing film. The method further comprises separating the conductive catalyst containing film from the supporting layer and pulverizing the conductive catalyst containing film to obtain the metal catalyst. The method for preparing the electrode comprises mixing the metal catalyst with a hydrophobic binder and a second solvent, coating the mixture on an electrode support, and drying it.

Method for preparing metal catalyst and electrode

A catalyst slurry, an electrode prepared by using the same, and a fuel cell including the electrode. The catalyst slurry includes: a catalyst material; a binder; and a solvent including a first liquid for dissolving the binder and a second liquid having a viscosity that is higher than that of the first liquid.

Catalyst slurry, electrode prepared by using the catalyst slurry, and fuel cell including the electrode

A binder for an electrode of a fuel cell is a basic polymer including a nitrogen-containing functional group and a proton conductive polymer having a phosphoric acid impregnation capacity of 200 wt % or less. An electrode for a fuel cell includes the binder and a catalyst, and a fuel cell includes the electrode. The electrode is manufactured by mixing the binder, a catalyst, and a solvent; and coating the mixture on a carbon support and heat-treating the coated mixture. The binder has excellent proton conductivity by having a phosphoric acid impregnation capacity of 200 wt % or less, and has improved durability without membrane damage and micro-structural changes due to swelling, which occurs when PBI is used as a binder. Accordingly, an electrode including the binder has improved phosphoric acid retention capacity, and increased wetting velocity. Thus, a fuel cell having improved efficiency can be manufactured due to the improved proton conductivity and durability of the electrode.

Binder for electrode of fuel cell, electrode for fuel cell including the binder, method of manufacturing the electrode, and fuel cell using the electrode

Provided are an additive to an electrode for a fuel cell that is a proton conductive compound having at least one phosphate group, an electrode for a fuel cell including the same, a method of manufacturing the electrode for a fuel cell, and a fuel cell using the electrode. The additive to an electrode for a fuel cell improves the durability of a fuel cell and reduces the amount of phosphoric acid discharged during operation of the fuel cell by fixing the phosphoric acid. Accordingly, a fuel cell having improved efficiency may be prepared using the additive because of improved proton conductivity and durability.

Additive of electrode for fuel cell, electrode for fuel cell including the same, manufacturing method thereof, and fuel cell using the same

A method of preparing a metal catalyst including a conductive catalyst material and a coating layer formed of a water repellent material on the surface of the conductive catalyst material includes: obtaining a water repellent material solution by mixing a water repellent material and a first solvent; obtaining a conductive catalyst solution by mixing a conductive catalyst material and a first solvent; mixing the water repellent material solution and the conductive catalyst solution; casting the result onto a supporter, drying the cast result and then separating a metal catalyst in a solid state from the supporter; and pulverizing and sieving the product. Also provided is a method of preparing an electrode including the metal catalyst.

Method of preparing metal catalyst and electrode including the same

A metal catalyst including a conductive catalyst material and a coating layer formed of a water repellent material on the conductive catalyst material, an electrode including the metal catalyst, and a fuel cell employing the electrode. By forming the coating layer, having a water repellent material, on the conductive catalyst material, the metal catalyst does not sink in the liquid electrolyte, the distribution and movement of the liquid electrolyte around the metal catalyst can be controlled, and the thickness of the interface between the metal catalyst and the liquid electrolyte can be regulated. Accordingly, an ideal electrode structure having triple phase boundary for electrochemical reaction can be formed. A fuel cell employing an electrode including the metal catalyst has excellent efficiency and overall performance.

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Yongin-si, South Korea

Suk-gi Hong