Russian scientists find improved lithium-ion battery capacity and rapid charge and discharge method

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

The Russian Federal Research Center "Orthopedic Science Center", the Siberian Center of the Siberian Center, the Siberian University, the Siberian Federal University and the National Research Institute "Moscow Iron Alloy College", the use of graphene The compound of the monolayine disulfide film as the anode material of the lithium ion battery will increase the capacity and charging speed of the battery. The results have been published in "Thejournal Fhysicalchemistry" magazine. Today, the lithium-ion battery is the most popular power supply in many equipment (from mobile phone to electric vehicles).

Compared to traditional batteries, these batteries have high specific capacity, long service life and good security. Despite these advantages, the capacity of new batteries and increasing charging speed is still in urgent need of processing. The physical substrate of the lithium ion battery is two electrodes separated by a porous polymer material, namely anodes (positive) and cathode (negative).

When charging, the current moves lithium ions from the cathode to the anode, while the battery is used in the opposite direction. When the battery is exhausted, the mobile capabilities of the lithium ions between the electrodes are very low, which is why smartphones have been charged for a few months, which is more frequently charged. Today, using graphene can extend the life of the battery.

Grainne is a magical two-dimensional material, which has been awarded the Nobel Physics Award in 2010. It has a large specific surface area, good conductivity and elasticity. Graphie can be widely used in various industrial categories, including energy storage equipment.

Composites developed by Russian scientists are two-dimensional structures composed of two heterogeneous layers (gaute and vanadium sulfide). The thickness of this sheet is about 1 nanometer. The study confirmed that the lithium ions can be limited to the surface of the material, but also in space between the layers, the final result causes the high specific capacity of the material.

Scientists estimate that the positive electrode material capacity of the composite can reach 569mAh / g, and the graphite that is most common to the anode is almost doubled by the lithium-ion battery. Theoretical calculation declaration, graphene and vanadium compound not only guarantees the effect of electron transfer, but also ensures mechanical strengthening of materials. In addition to capacity, the key characteristic of the composite material is that the mobility of lithium ions in the inside of the material is high.

This can quickly charge the battery or supply power to high power equipment. In addition, the high mobility of ions can make the battery work normally at low temperatures. In the study, scientists also found another tight feature.

After the material is filled with lithium ions, it is also possible to maintain graphene magical electronic properties in the composite. Scientists believe that this effect is a new possibility to control the performance of graphel nanomaterials. This study has been funded by the Russian Federal Education Science and the Russian Basic Research Foundation.

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