Abstract: The present disclosure relates to a system for early detection of fire in an ESS battery module, particularly to a system capable of early fire detection of a battery module inside an ESS including: an air suction-type detector that is fitted to the exterior of the ESS and detects fire by introducing gas inside the ESS battery module; a suction line, of which one end is connected to the ESS battery module, sucks gas inside the ESS battery module in real time and introducing the gas into the air suction-type fire detector; a suction pump that is fitted to one side of the suction line and supplies power for drawing air from inside the ESS battery module into the suction line; and a multiple sensing unit that is fitted to one side of the suction line and senses a temperature of the gas introduced through the suction line, as well as any generated gas.

Abstract: The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. By comprising a specific combination of host compounds and/or an organic electroluminescent compound according to the present disclosure as an organic electroluminescent material, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan characteristics can be provided.

Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure, it is possible to produce an organic electroluminescent device having improved driving voltage, power efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: Disclosed are a solid electrolyte and method of manufacturing the same. The solid electrolyte may include a core including a first electrolyte represented by Chemical Formula 1, and a shell including a second electrolyte represented by Chemical Formula 2, and disposed on a surface of the core. LiaPSbX1c??[Chemical Formula 1] Here, a satisfies an equation 4?a?7, b satisfies an equation 3?b?7, c satisfies an equation 0?c?2, and X1 includes Br or I. LidPSeX2f??[Chemical Formula 2] Here, d satisfies an equation 4?d?7, e satisfies an equation 3?e?7, f satisfies an equation 0?f?2, X2 includes Cl or Br, and an ionic radius of X1 is greater than an ionic radius of X2.

Abstract: A combination railroad tie for supporting railroad track rails on a ballast or concrete roadbed. The main body portion of the tie is wood, having a rectangular cross section and a flat upper and lower surface. A plurality of flat plastic plies made of shredded wood fibers or wood chips bonded together by a thermal setting resin are, in turn, bonded to the upper and lower surfaces of the main body portion.

Abstract: Particles of metallic sodium or potassium are placed on a wood substrate which has been pre-heated. When the wood substrate is introduced subsequently into a steam zone the sodium or potassium, as the case may be, reacts exothermally with the water vapor, melts and burns, charring the wood in localized regions. The particles of sodium or potassium are confined by grains of sand which are subsequently brushed away with any loose charcoal to produce a distressed surface to the wood.