KIST scientists were able to stretch the battery by up to 50% without damaging performance or compromising safety. In addition, the problem of liquid electrolyte leakage under deformation must also be solved, as well as the problem of leaking liquid electrolyte. However, it is very difficult to impart stretchability to the battery because the solid inorganic electrode material occupies most of the volume, and other components such as current collectors and separators must also be made stretchable. These advancements have considerably increased the need for energy storage devices to be designed in flexible and stretchable forms that mimic human skin and organs. Rapid technological advancements in the electronics industry have led to a fast-growing market for high-performance wearable devices, such as smart bands and body-implantable electronic devices, such as pacemakers. The battery was developed by fabricating a structurally stretchable electrode consisting solely of electrode materials and then assembling with a stretchable gel electrolyte and stretchable packaging. Jeong Gon Son's research team at the Photo-Electronic Hybrids Research Center at the Korea Institute of Science and Technology (KIST) announced that they had constructed a high-capacity, stretchable lithium-ion battery. Schematic diagram of stretchable battery manufacturing process Credit (Image: Korea Institute of Science and Technology - KIST)Ī Korean research team has developed a lithium-ion battery that is flexible enough to be stretched. According to the scientists, the battery represents a significant step in the development of wearable or body-implantable electronic devices. This new solid enables chemical reactions that produce lithium oxide (Li2O) on discharge.Summary: Scientists in South Korea have worked with graphene and carbon nanotubes to develop a working lithium-ion battery that can be stretched by up to 50% without damage to any of the components. “The team’s new solid electrolyte is composed of a ceramic polymer material made from relatively inexpensive elements in nanoparticle form. This chemical sequence stores and releases energy on demand. ![]() “The lithium peroxide or superoxide is then broken back down into its lithium and oxygen components during the charge. “In past lithium-air designs, the lithium in a lithium metal anode moves through a liquid electrolyte to combine with oxygen during the discharge, yielding lithium peroxide (Li2O2) or superoxide (LiO2) at the cathode,” the report reads. The Argonne National Laboratory report explained the key differences between its latest lithium-air design and previous attempts to crack the formula. ![]() “That is nearly four times better than lithium-ion batteries.” “With further development, we expect our new design for the lithium-air battery to also reach a record energy density of 1200 watt-hours per kilogram,” Curtiss says.īoxes of lithium-ion rechargeable battery cells, stacked at the BMW automobile manufacturing plant in Dingolfing, Germany. The researchers claim their lithium-air battery has already achieved 675 watt-hours per kilogram, which compares to approximately 250Wh/kg in existing lithium-ion batteries used in cars, but there is scope for significant improvement. ![]() The key to this development is the switch from a liquid electrolyte to a solid type, which not only improves the stability of the battery – reducing the risk of overheating and catching fire – but also allows for the increase in energy density. “The lithium-air battery has the highest projected energy density of any battery technology being considered for the next generation of batteries beyond lithium-ion.” “For over a decade, scientists at Argonne and elsewhere have been working overtime to develop a lithium battery that makes use of the oxygen in air,” says Larry Curtiss, an Argonne Distinguished Fellow, in a paper explaining the breakthrough.
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