Russian scientists succeeded in creating an energy-intensive organic cathode for batteries

Scientific research with a view to significantly improve existing batteries do not stop for a minute, not only overseas colleagues are able to discover something new. So, Russian scientists from the Center for Energy Science and Technology Skolkovo Tech, together with colleagues from the Institute of Chemical Physics Problems and Russian Chemical-Technological University have created a completely new material for cathodes that are used in fast-charged metal ion batteries.

This latest development will greatly enhance not only the full charging time, but also the capacity of the power supplies in comparison with existing analogues of western production.

The results of the research were published in the Journal of Material Chemistry A.

As F. told Obrezkov created material shows a superior performance. The cycle of charge and discharge at battery was only 18 seconds at a current density of 200 A / m2.

As is known, the cathode materials based on politrifenilamina implemented, as well as analogous compounds showed a great performance in metal-ion accumulators (stability, rapid charge-discharge), but in this group of polymers it was a critical drawback - produced batteries had a scanty capacity.

group of Russian scientists for several years tried to neutralize this disadvantage, trying to synthesize the derivatives politrifenilamina and polymeric molecules.

And as a result of numerous practical experiments it was created a substance called PDPPD, whose specific capacity was more than two times higher than that of conventional politrifenilamina.

Based on the new substances and were created lithium-ion battery, and the battery based on sodium and potassium compounds.

These experiments showed that after 500 cycles of charge and discharge these batteries have lost only 25% of its original capacity.

But despite this outstanding performance in new batteries, there are significant weaknesses that could significantly limit their use:

These batteries do not tolerate extreme strain. Thus electrolyte consisting of a mixture of compounds of lithium carbonate, ethylene demetilkarbonata becomes unstable already at a voltage of 4.2 volts.

If we manage to find a replacement for this electrolyte, before a new type of battery will open broad prospects in the mass use of, for example, long-lasting and relatively cheap electric cars.

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