Current Affairs – October, 2019

Latest Current Affairs October, 2019 with Current Affairs, news summary on current events of National and International importance of October, 2019 for Banking, SSC, CLAT, UPSC, State PCS, IBPS, Railways and other Competitive Examinations.

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Researchers developed renewable energy storage device

The researchers, including those from Queen Mary institute of London in United Kingdom (UK) have developed a new dielectric capacitor, a device that stores energy (like battery). The study was published in journal Nature Communications.

Key Findings about Device

Working: The researchers found that by pressing and folding a polymer film capacitor, they were able to store 30 times more energy than best-performing commercially available dielectric capacitor. The researchers took the inspiration for this new energy storage device from a French pastry called croissant which is made by folding multiple layers of dough.

Function: The study noted that dielectric capacitors in general have ultrahigh power density which makes them suitable for technologies that require accumulating energy over a period of time and then releasing it very quickly like motor drives and even space vehicle power systems. Until now, such capacitors had limitation of storing low amounts of energy but this new finding promise a significant impact on the field of pulse power applications and could produce a step-change in field of dielectric capacitors, which was so far limited by their low energy storage density.

Significance: As this is the highest energy density ever reported in a polymer film capacitor, so the advances in technology may pave a way for low-cost, efficient, and environmentally-friendly electric energy storage systems for wind as well as solar sources. Even though storing energy can be tricky and expensive, especially with renewable energy sources, but with this technique, large amounts of renewable energy can be stored.

Stable form of Plutonium discovered accidentally

Scientists led by Helmholtz Zentrum Dresden Rossendorf have found new compound of Plutonium unexpectedly in France. The team was actually trying to create plutonium dioxide nano particles using different precursors. In the process, the plutonium at its pentavalent state showed a peculiar behavior. The scientists then learnt that the strange behavior of Plutonium at its pentavalent state was because it was stable! The team confirmed its stability using Pu M4 edge technology.

The experiment was repeated after 3 months and the element showed the same behavior. The scientists thus confirmed that Plutonium exhibited stability properties at its pentavalent state.

Significance

  • The unstable radioactive dangerous plutonium that is predominantly used in nuclear applications are tricky to transport, store and dispose.
  • The scientists were in the process of creating Plutonium Dioxide as it is relatively stable as compared to other radioactive materials. It does not dissolve in water
  • The major drawback of Plutonium waste is that when dumped underground, they contaminate water table to a radius of 10 km.

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