Nanoscale Diamonds Make Lithium-ion Batteries Safer

- Mar 19, 2018-

The scientists of collaboration between China and the United States, according to a study into the lithium ion battery electrolyte add nanoscale diamond particles, can prevent the battery internal generated cause a short-circuit sediment, to avoid accidents such as fire.

The study, which was published in the new issue of the journal nature communications, was completed in collaboration with institutions such as tsinghua university in China and drexel university in the United States.

Lithium battery has high energy density and good charge and discharge performance. It is widely used in industrial and consumer electronics.But if the electrodes are made of pure metallic lithium, the inside of the battery is likely to produce dendritic deposits called dendrites, which can cause a short circuit after a certain size.Lithium batteries currently use lithium - embedded graphite materials as electrodes, which can reduce the "dendrite" production, but also significantly reduce the energy storage effect, which is only one tenth of the lithium ion battery used for lithium metal.

The researchers added nanodiamonds to lithium ion battery electrolytes and found that the resulting sediments were smooth, not dendritic.The new result is expected to inhibit dendrite production in the case of pure lithium electrodes, making lithium batteries safe and high-performance.

Nanodiamonds are tiny diamond particles that are less than a millionth of the diameter of a hair and are cheap to make.They have extremely regular structure, easy to arrange and form a smooth surface.

Added to the lithium ion battery in the experiment of nano diamond withstand 200 hours of stable charge and discharge cycle, it is enough for some industrial applications, but if you want to used for smart phones and laptops, still need to further improve and verify performance.