A joint effort by Chinese and foreign scientists has recently reached the headline of the “Nature†website: Graphene, boron nitride, and other two-dimensional nanomaterials have the property of allowing only protons to pass through, which is expected to replace the core components of fuel cells.†The existing materials of proton-conducting membranes have revolutionized the development of fuel cells. This achievement was accomplished by Professor Wu Hengan from the University of Science and Technology of China, Wang Fengchao, Associate Fellow and Nobel Prize-winner of physics, Professor Andre Heim of the University of Manchester, UK, and researchers from the Nijmegen University of the Netherlands. The fuel cell is a power generation device that directly converts the chemical energy contained in the fuel into electric energy, and has many advantages such as high energy conversion efficiency, no need for charging time, zero emission and no pollution, and the application prospect is very broad. However, the presence of fuel infiltration and other defects in the "proton-conducting membrane", the core component of the fuel cell, greatly limits its large-scale application. According to Wu Heng'an, the traditional view is that any gas molecule or fluid molecule cannot penetrate flawless perfect graphene sheets. Their research shows that protons can easily cross two-dimensional materials such as graphene and boron nitride. If the temperature is increased or the catalyst is added, the penetration process will be significantly faster. Based on this research result, single-atomic-layer two-dimensional materials such as graphene and boron nitride can be used as "proton-conducting membranes," which will make fuel cells more efficient, safer, more environmentally friendly, and thinner. (Zhao Yongxin, Liu Aihua) The utility model discloses a Kitchen Shower head that is convenient to switch the water outlet mode, has a compact structure, and is easy to use, and a kitchen faucet using the kitchen shower head. , The shower head is provided with a water separator, and the water separator is provided with an annular flow channel and an inner flow channel respectively connected to the spray water outlet body and the V-shaped water outlet body, and the lower end of the outer wall of the water separator is upwardly circular A plurality of water inlet holes connected to the annular flow channel are provided, and a first sealing ring is provided on the lower side of the water inlet hole; the water outlet end of the shower body is connected with a converter, and the converter is provided with a communicating In the water diversion cavity at the water outlet end of the shower body, the lower end of the water diversion device is installed in the water diversion cavity and can move up and down, and the upper end of the inner wall of the water diversion cavity is provided with a convex ring matching the first sealing ring, so The bottom surface of the water diversion cavity is provided with a sealing gasket that can seal the inner flow channel. Waterfall Shower Head,Overhead Shower Head,Push Button Hand Shower,Brushed Nickel Sink Faucet Yuyao Zelin Sanitary Ware Co., Ltd , https://www.zelinsinkfaucet.com