Superelastic EGaIn Composite Fibers Sustaining 500% Tensile Strain with Superior Electrical Conductivity for Wearable Electronics

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Abstract
Stretchable conductive fibers have gained significant attention in the field of wearable and flexible electronics due to their inherited unique properties. Up to now, there are few reports regarding the highly stretchable fibers with excellent electricity properties. In this work, a highly stretchable fiber with superior electrical conductivity is fabricated, which contains a core fiber, an intermediate modified layer, and an outer eutectic gallium indium liquid metal layer. The fiber demonstrates excellent electrical conductivity of over 103 S cm−1 when stretched up to 500% strain, which is far superior to the existing stretchable conductive fiber. The stretchable conductive fiber shows excellent thermostability with a maximum operating temperature of nearly 250 oC. The unique fibers can be applied as highly stretchable, deformable conductor to charge a mobile phone and sensor to monitor human activities. This study offers promising application in the areas of flexible and wearable electronics.
Funding Information
  • National Natural Science Foundation of China (51890893, 91748206)

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