This yarn is drawn and twisted by ultrathin stainless steel 316L filaments which are spun at high temperature. Since the source of yarn is stainless steel, it is inherently highly conductive.
The conductive yarn is an electrode. With two such electrodes and electrolyte, a battery is made.
This high-performance wearable battery imposes two considerable requirements for yarn electrodes: high electric conductivity and high mechanical strength. Although many conductive yarns have been demonstrated (for example, repetitive surface coating of carbon nanotubes (CNTs) and metals, spinning of carbonaceous materials, etc), the two desirable features for batteries are not possessed at least simultaneously, besides the cost-expensive and time-consuming limitations.
The wrist band itself is made up of a cloth weaved by this yarn. The band is an assembly of five cloth batteries in series.
The rechargeability is very important for batteries because it means sustainable use and low cost.
Yes, exactly. Therefore, we call it "rechargeable".
With a power source such as a DC power supply providing current/voltage, the battery is recharged.
The textile battery can be worn to charge various electronic devices, such as watch, sensor, etc. It is not just for medical purposes.
We haven't seen clothes or dresses with this kind of a battery. If all technical issues regarding wearing comfortability and safety etc are solved, the dress itself can be a battery. The battery can also be embedded in part of the dress.
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