Radical battery production technology doubles battery life

Most of the smartphones, tablets, and laptops we use are lithium-ion batteries. These batteries use liquids as electrolytes, but these liquid electrolytes are very flammable. In this regard, solid electrolytes may be It is safer, but the solid electrolyte itself has irregularities and it needs to be used with caution. Researchers at the Massachusetts Institute of Technology (MIT) have discovered a dual lithium-ion battery that combines liquid and solid electrolytes to prevent short-circuiting of the liquid electrolyte by using a smooth solid electrolyte surface.

The electrolyte in the battery is the material between the positive and negative electrodes. When the battery is charged or discharged, ions from one electrode pass through the electrolyte to the other electrode. The liquid electrolytes that are commonly used are flammable, and they are also very tolerant of dendrites. The dendrites can cause the battery to short circuit and damage the battery. In order to solve this problem, researchers try to use solid electrolytes, such as special ceramic materials. Although this can eliminate the risk of flammability of short circuits, actual tests show that the operation of solid electrolytes and their irregularities are more likely to cause short circuits than expected. .

On the left is a rough solid electrolyte surface. The right picture is a smooth solid electrolyte surface.

Earlier researchers had a erroneous understanding of the nature of solid electrolytes. They believe that the solidity of solid electrolytes determines whether dendrites will be produced, but MIT researchers found that the smoothness of electrolytes is an important factor in preventing dendrites. MIT researchers believe that the immobilization of the electrolyte does not determine whether the dendrites of the cell can penetrate into the electrolyte. Studies have shown that the smoothness of the electrolyte surface is an important factor to prevent dendrite, and small scratches on the surface of the electrolyte may lay the foundation for dendrite production.

The use of a smooth solid electrolyte can eliminate the problem of flammability of the electrolyte, and solid lithium metal can also be used as a battery electrode, and the liquid-solid combined electrolyte potentially doubles the lithium-ion battery's battery capacity. The current battery technology is still deepening. Research, once feasible, will break the bottleneck of electric vehicles and portable devices.

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welding masks are most commonly used with arc welding processes such as shielded metal arc welding, gas tungsten arc welding, and gas metal arc welding. They are necessary to prevent arc eye, a painful condition where the cornea is inflamed. welding masks can also prevent retina burns, which can lead to a loss of vision. Both conditions are caused by unprotected exposure to the highly concentrated ultraviolet and infrared rays emitted by the welding arc. Ultraviolet emissions from the welding arc can also damage uncovered skin, causing a sunburn-like condition in a relatively short period of welding. 

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