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Nano Lett. 2014 Jun 11;14(6):3197-202. doi: 10.1021/nl500531r. Epub 2014 May 19.

A multifunctional load-bearing solid-state supercapacitor.

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Department of Mechanical Engineering, Vanderbilt University , Nashville, Tennessee 37235, United States.


A load-bearing, multifunctional material with the simultaneous capability to store energy and withstand static and dynamic mechanical stresses is demonstrated. This is produced using ion-conducting polymers infiltrated into nanoporous silicon that is etched directly into bulk conductive silicon. This device platform maintains energy densities near 10 W h/kg with Coulombic efficiency of 98% under exposure to over 300 kPa tensile stresses and 80 g vibratory accelerations, along with excellent performance in other shear, compression, and impact tests. This demonstrates performance feasibility as a structurally integrated energy storage material broadly applicable across renewable energy systems, transportation systems, and mobile electronics, among others.


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