Many of the current batteries use a similarly-dense yin and yang dual-electrode structure with non-conductor isolation in the middle. But now, engineers at Cornell University have developed an unusual new structure because of their vortex-like structures and their instantaneous charging characteristics. The new technology is based on a complex set of porous shapes—a gyroid—before it was often used to make “two-dimensional wonder material†graphene. In addition, ultrathin carbon films have been used for new batteries (although they have not been compared with graphene), relying on a self-assembly process known as "blockco-polymer." This carbon-based helices form the anode of the cell, which contains thousands of holes, each about 40 nm wide. These pores were coated with approximately 10 nm thick separation layers, followed by sulfur cathodes, and finally filled with a final portion of voids using a conductive polymer called PEDOT. Each pore can store and transfer energy, very similar to a miniature battery. But by dispersing them to the huge surface area of ​​the helix, the energy density of the new architecture is much greater than that of traditional battery designs. The researchers said that in practice, this means that the battery can be charged in seconds or even faster! Lead researcher Ulrich Wiesner said: This three-dimensional structure basically eliminates all the volume loss in the device. What's more important is that the areas of mutual penetration are reduced to the nanoscale, so we can increase energy density as an index. In other words, you can get energy in less time than with traditional battery structures. Even so, the new design is not without its flaws. When the battery is charged and discharged, sulfur will swell and the PEDOT part will not. Over time, the latter will gradually wear out. Wiesner pointed out: When the sulfur expands, these tiny polymers are torn into pieces. When it shrinks again, it cannot be reconnected. This means that part of the 3D battery can no longer be used.
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Spiral battery imaging developed by Cornell University 