Macroscopically coiled and microscopically buckled fiber electrodes are introduced for an ultra-stretchable supercapacitor. The pseudocapacitive MnO2-coated, solid-state, buckled coil supercapacitor provides superelasticity (400%–800%) and high linear, areal capacitances (4.8 mF cm−1 and 22.8 mF cm−2). Additionally, the capacitances of the supercapacitor decrease by less than 7.4% and 7% when stretched by 600% statically and dynamically, respectively.
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Choi et al. (2016) studied this question.