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Graphite coating makes the perovskite solar battery waterproof pave the way for hydrogen production1

According to foreign media reports, the university of bath, 英国巴斯大学) Researchers, a new type of graphite coating was applied to perovskite solar cells, and make it have waterproof function, hope the future will use the hydrogen fuel cell to produce clean.

at present, the market is most common silicon solar cells, expensive and very thick, limiting the scope of use. Perovskite solar cells use titanium oxide and calcium of the same material, the 3 d structure is thinner and more cheap, easy to print to the surface. At the same time, can work under low light conditions, the output voltage is higher than silicon. Its disadvantage is that the work is not stable in water, this is a huge development obstacle, for direct use them to produce clean hydrogen fuel will have an effect.

at the university of bath, scientists and chemical engineers of sustainable chemical technology center, through the use of graphite waterproof coating, solve the problem. They used the commercial thermal conductive graphite slice and mesoporous carbon support, encapsulated metal halide perovskite ( CsPbBr3) Waterproof methods, as a effective and cheap solar cells. Then the coating perovskite battery into the water, test the waterproof effect; , and by using the collected solar energy to split water into hydrogen and oxygen. As a result, under the constant to simulate the sun light, electric current is higher than 2 macm & minus; 2, the electric potential of 1. 23 vrhe cases, battery work underwater coating for 30 hours, than the previous record for more than 10 hours. Since then, between the coating and cell agglutination failure. Scientists are going to use effect is stronger glue content, let the battery in a longer period of time remained stable.

prior to that, it has been used containing indium alloys, help solar cells is waterproof, but indium is a rare metal, expensive, unsustainable mining process. Buss team is using a commercially available graphite, low cost, more sustainable than indium. Perovskite solar battery technology, making people more easily afford economically. The researchers tried to perovskite battery voltage, improve by electrolysis of water required to achieve, and no additional power supply. In order to solve this challenge, the team is trying to add catalyst, reduce the energy required to drive response.

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