The popularity of wearable devices is growing every day. However, they are united by one common drawback - a limited power supply, which must be regularly replenished. Scientists have proposed their own version of the solution to this problem.
An international team of researchers at the University of Illinois has developed a flexible battery that can be applied to human skin like an adhesive plaster.
Since it is problematic to carry conventional batteries directly on the body, it was decided to "compress" several lithium-ion power sources into very thin tiles, connecting them with wires to form one large battery. All of this was then “packaged” in a soft elastic material covered with tougher rubber.
The result is a waterproof and plaster-like stretch battery that can be worn on the body as a mobile battery. Testing has shown that the battery can stretch up to 30% without loss of properties.
To demonstrate the potential use of the battery, the developers connected a sensor device, miniature solar panels and biometric sensors to it. The result is a prototype of a medical bracelet, broadcasting an incessant stream of biosensor data.
The creators of the device intend to adapt it to various types of power sources, for example, powered by the energy of body movement or heat. The battery can be integrated into clothing and even socks, allowing biometric sensors attached to the body to work 24/7 without any recharging.