Air-stable conductive polymer ink for printed wearable micro-supercapacitors

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Printed electronics are expected to facilitate the widespread distributed wearable electronics in the era of the Internet of things. However, developing cheap and stable electrode inks remains a significant challenge in the printed electronics industry and academic community. Here, overcoming the weak hydrophilicity of polyaniline, a low-cost, easy-fabricating, and air-stable conducting polymer (CP) ink is devised through a facile assemble-disperse strategy delivering a high conductivity in the order of 10−2 S cm−1 along with a remarkable specific capacitance of 386.9 F g−1 at 0.5 A g−1 (dehydrated state). The additive-free CP ink is directly employed to print wearable micro-supercapacitors (MSCs) via the spray-coating method, which deliver a high areal capacitance (96.6 mF cm−2) and volumetric capacitance (26.0 F cm−3), outperforming most state-of-the-art CP-based supercapacitors. This work paves a new approach for achieving scalable MSCs, thus rendering a cost-effective, environmentally friendly, and pervasive energy solution for next-generation distributed electronics.

Xiao Xiao(肖潇)
Xiao Xiao(肖潇)

My research focuses on bioelectronics for energy and healthcare applications.