Researchers have shown that coordination polymers can be used to create long-lasting, stable batteries with a high charge / discharge rate.
Most existing energy storage devices take about an hour or longer to fully charge, which limits their use..
This is due to the fact that when charging is accelerated, the capacity of active anode materials such as graphite decreases sharply. To avoid this, materials must have high ionic and electrical conductivity..
Skoltech Colloquium: Green Energy with Prof Mehrmann, 26.11.2015
A team of scientists from Skotech with colleagues was looking for suitable options and studied coordination polymers from aromatic amines and transition metal salts.
Although the initial conductivity of linear polymers of nickel and copper based on tetraaminobenzene was worse than that of their two-dimensional analogs, it turned out that when doped with lithium, they can be made anodes that can be fully charged and discharged in less than 60 seconds..
Scientists also found that the resulting anode materials remain stable during fast charging / discharging and even after 20 thousand cycles retain up to 79% of the maximum capacity..
In addition, it turned out that a copper-based polymer can be used to create a cathode with a high capacity. Although in this case it has not yet been possible to achieve stable operation, the team hopes to solve this by optimizing its structure..
Recall that recently Indian scientists made a prototype of an iron-ion battery with a mild steel anode, the capacity of which reaches 55-60% lithium-ion.
text: Ilya Bauer, photo: Skolkovo Institute of Science and Technology, tildacdn