A team of researcher from KAIST in South Korea, is developing a flexible battery that is thinner than a credit card and which could be used in various electronic applications such as watch straps, smart cards and wrinkle smoothing patches.The new battery is 0.5 mm thick and the electrodes are laid side by side on the same plane.The battery exposes a 7.4 voltage that is maintained over 5,000 bending cycles.
The researcher Jang Wook Choi said, "The greatest significance of this work is reducing the thickness of the battery while demonstrating robust bendability and cell performance."Its performance could be increased by closely putting the 2 mm electrodes, approx 400 µm aside from each other.In the battery electrodes are very close which raise the chance of short circuit.The researchers solved this problem by interelectrode barriers with curvy electrode structure and interelectrode barriers have direct link between adjacent electrodes.In bending, adjacent electrodes ends stay away from each other due to the curvy electrode structure.
The researchers said that the battery timing can be increased by decreasing the distance of interelectrodes.They are thinking that printing technique has potential to produce more detail patterns at high speeds and more precise."Future plans include developing a process for scalable production, such as printing techniques," Choi said.
The battery could be recharged without any wire and by an integrated solar cell.For wireless charging connect the battery to a coil that receives electromagnet power from a transmitting coil that is 1 cm away.For solar charging connect the battery to a solar cell.
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