According to foreign media reports, one of the current main methods for producing hydrogen for fuel cells is to use artificial photosynthesis to split water into oxygen and hydrogen, but now a new type of hybrid device will not only produce hydrogen but also some The wasted energy is converted into electrical energy. Although the use of artificial photosynthesis to produce hydrogen has made great progress recently, it still has efficiency problems. Many photosynthesis can only use the single-digit percentage of the sunlight shining on them, which is much lower than conventional photovoltaic systems, which can achieve a light conversion rate of 20% and the highest can even achieve 45%. Researchers from the Berkeley Laboratory and the Joint Center for Artificial Photosynthesis (JCAP) attributed the reduction in silicon efficiency to the non-silicon content of the water splitting device. The lead author of the study, Gideon Segev, said that this is like driving in first gear. Although it can receive energy, because silicon does not maximize its efficiency, most of its active electrons have nowhere to go, so they are being used. It has lost energy before being used for useful work. Perhaps the answer to this problem is surprisingly simple-why not let these electrons leave? To do this, the researchers added a second electrical contact behind the silicon portion of the device. In this way, the current generated by sunlight can be separated, so that part of the current splits the water into hydrogen and oxygen, and the other part is stored in the form of electrical energy. Researchers call this brand new device a photoelectrochemical and voltaic hybrid (HPEV) battery. For reference, the researchers also calculated that the efficiency of traditional artificial photosynthesis equipment using silicon and bismuth vanadate is 6.8%, while the HPEV battery has 13.4%, plus the 6.8% hydrogen-generating battery can achieve a total efficiency There are 20.2%. Related research reports have been published in "Nature Materials". Aluminum Alloy Handle,Aluminum Alloy Door Handle,Hardware Wire Drawing Handle,Interior Door Handle Guangzhou Junpai Hardware Co., Ltd , https://www.gdjhfurniture.com
