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Stretchable Tandem Micro-supercapacitors with High Voltage Output and Exceptional Mechanical Robustness
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Stretchable Tandem Micro-supercapacitors with High Voltage Output and Exceptional Mechanical Robustness
Posted:2018-02-05 14:59    Column:2018

H. Xiao, Z.-S. Wu*, F. Zhou, S.H. Zheng, D. Sui, Y.S. Chen,* X.H. Bao
Energy Storage Materials, 2018, 13, 233-240.
DOI:10.1016/j.ensm.2018.01.019 [PDF]

The drastic advancements in wearable electronics have ultimately stimulated the urgent development of stretchable microscale power sources with high-voltage output and unprecedented integration. However, the creation of such energy storage devices remains elusive. Here we demonstrated the fabrication of stretchable tandem planar micro-supercapacitors (MSCs) with high voltage output, outstanding flexibility, robust cyclability, and sturdy integration, based on the interdigital electrode patterns of acid-treated, tightly intertwined graphene/carbon nanotube/cross-linked PH1000 film (GCP), in which PH1000 wrapped carbon nanotubes act as the stretchable backbone and capacitance contributor, and graphene nanosheets serve as high-conductive enhancer. The stretchable GCP patterns were directly manufactured by mask-assisted filtration of GCP ink, and transferred onto a pre-strain rubber substrate, showing high electrical conductivity (610 S cm-1), and impressive stretchablitiy. The resultant GCP-MSCs delivered high areal capacitance of 107.5 mF cm-2, and presented notable performance uniformity without obvious capacitance degradation after being stretched up to 200%, and stable cyclability with capacitance retention of 93.2% after 8000 cycles under repeatedly stretch-and-release strain. Moreover, our fabrication strategy is highly scalable for the generation of stretchable tandem MSCs without requirement of additional metal-based interconnects. As demonstrated, our stretchable tandem device of three serially-interconnected GCP-MSCs showed fully stretchable with strain rate up to 200%, and extended voltage output of 2.4 V in comparison with single cell (0.8 V), demonstrative of the great potential for wearable electronics.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn
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