Impact-resistant supercapacitor by hydrogel-infused lattice

Shixiang Zhou, Yijing Zhao, Kaixi Zhang, Yanran Xun, Xueyu Tao, Wentao Yan, Wei Zhai and Jun Ding ()
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Shixiang Zhou: National University of Singapore
Yijing Zhao: National University of Singapore
Kaixi Zhang: National University of Singapore
Yanran Xun: National University of Singapore
Xueyu Tao: China University of Mining and Technology
Wentao Yan: National University of Singapore
Wei Zhai: National University of Singapore
Jun Ding: National University of Singapore

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract The safety of energy storage devices is increasingly crucial due to the growing requirements for application under harsh conditions. Effective methods for enhancing robustness without compromising functionality are necessary. Here we present an impact-resistant, ready-to-use supercapacitor constructed from self-healable hydrogel electrolyte-infused lattice electrodes. Three-dimensional-printed carbon-coated silicon oxycarbide current collectors provide mechanical protection, with compressive stress, Young’s modulus, and energy absorption up to 70.61 MPa, 2.75 GPa, and 92.15 kJ/m3, respectively. Commercially viable polyaniline and self-healable polyvinyl alcohol hydrogel are used as active coatings and electrolytes. I-wrapped package structured supercapacitor electrode exhibits a static specific capacitance of 585.51 mF/cm3 at 3 mA/cm3, with an energy density of 97.63 μWh/cm3 at a power density of 0.5 mW/cm3. It maintains operational integrity under extreme conditions, including post-impact with energy of 0.3 J/cm3, dynamic loading ranging from 0 to 18.83 MPa, and self-healing after electrolyte damage, demonstrating its promise for applications in extreme environments.

Date: 2024
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DOI: 10.1038/s41467-024-50707-0

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