According to foreign newsletter Etnews, under the efforts of Korean researchers, the research team of UNIST (Ulsan National Science and Technology Institute, Korea) developed the world's first elastic battery. This battery can maintain its original performance while being stretched, safe and reliable, and can be widely used in wearable devices. The current collector of a battery of a wearable device is a mixture of a high-conductivity material and a polymer having good tensile properties. However, when these batteries are stretched, the connection of the conductive material is broken and the electrical conductivity is reduced. The elastic battery just makes up for this shortcoming. It uses a composite material that is stretched to maintain its electrical conductivity, and uses the composite material as a current collector for the electrode. So popular speaking, the elastic battery is a safe and stretchable lithium-ion battery. The team created a new polymer composite by mimicking the structure of "Jabuticaba," which is known as the Brazilian grape. The battery consists of a polymer composite consisting of carbon nanotubes and carbon black. When this new type of polymer composite is stretched, the disconnected portion of the carbon black connecting carbon nanotubes maintains its original electrical conductivity. More importantly, lithium ion batteries made from this composite and aqueous electrolyte are more reliable than current batteries. When these batteries are stretched, the risk of danger is very low. There is no doubt that flexible batteries have a vast space for use in folding equipment and wearable devices, but they do not know whether they will be as difficult to produce as graphene batteries.
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Specific gravity 750kg/m3)
• Heavy: (QCH Range, specifically
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Specific gravity 1500kg/m3)
All
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