Silicon and phosphorene composite anodes increase the charging rate and capacity of lithium batteries

According to foreign media reports, India's Science Education and Research Institute (Indian Institute of Science Education and Research, IISER) of a Research team using silicon and phosphorus phosphorene Research and development of new compounds, used in lithium ion battery anode, the team by Satishchandra Ogale led.

According to the researchers, the material is highly efficient. Compared with current lithium-ion batteries, the new anode material increases the charging speed and capacity of the battery by three times and five times respectively, while reducing the overall weight of the battery. If only silicon is used as the anode material of the battery, its cycling stability will be weak.

As part of the experiment, IISER's researchers used phosphoene, a two-dimensional material of pure type, to make battery anodes with nano-silicon particles and a small amount of black phosphoene layer or pure phosphoene.

"In fact, the performance advantage gained by using phosphene comes from the structural design of phosphene, which provides greater flexibility and flexibility," Ogale said. The high mechanical flexibility allows it to hold lithium ions in the battery, which improves the charging speed of the battery.

, the researchers said the battery with the research and development of new materials, perhaps this materials can also be used in sensors, field effect transistor (field effect transistors) and optoelectronic devices, optoelectronic devices).

IISER may be able to reduce the size and weight of the battery while achieving the same capacity.

Kingshuk Roy, lead author of the study, said: "while silicon-based batteries are the future, the biggest challenge is to maintain their high degree of stability, thereby extending the battery's charging and discharging life."

On the first charge test, the new battery had a 78 percent retention rate, which means that irreversible loss -- the irreversible loss that occurs when a lithium battery's silicon-based anode mixes with a carbon compound -- would be irreversible.

Phosphene has structural advantages and can be used as a binder to prevent cracking. It is observed at high charging rate.

It is said that the lithium battery made of this material can withstand hundreds of charging and discharging cycles.