German engineers were able to double the energy density of lithium batteries

0
2
views

The land and all the more air electric transport needs batteries capable of saving more energy without becoming too heavy. The team of scientists from Germany demonstrated a new lithium-metal battery with an energy density of 560 W * h / kg, which is 2 times the density of existing commercial lithium-ion batteries. At the same time, the prototype of the new battery is very slowly degrading — lost only 12% of the capacity after 1000 cycles of charging-discharge.

Specialists of the Karlsruhe Institute and Institute. Helmholts in Ulme began to search for solving the problem of low energy density of batteries with a rich nickel and poor cobalt NCM88 cathode and organic electrolyte LP30. However, despite the fact that the cathode well showed itself from the point of view of energy density, such a battery architecture turned out to be unstable: cracks occurred in the cathode, and the electrolyte reaction destroyed the structure. In addition, a thick lithium layer was formed on the anode,

The test results showed that the lithium-metal battery with such an architecture has an energy density of 560 W * h / kg. According to analysts, overcoming the figure of 500 W * h / kg should become an important stage in the development of electrical transport. The energy density of modern lithium-ion batteries is 250-300 W * h / kg.

As for the service life, the new battery also showed itself from the best side — retained 88% of the initial capacity of 214 mA * b / g in the cathode after 1000 cycles. And on the current exit, the battery efficiency was 99.94%, like existing commercial lithium-ion batteries.

Last year, experts from the US Department of Energy


We tell about the most interesting news and technologies — from the upcoming total automation to alternative energy, from artificial intelligence to the future medicine.

Hayk +