A Multifunctional Load-Bearing Solid-State Supercapacitor

作者：Westover Andrew S; Tian John W; Bernath Shivaprem; Oakes Landon; Edwards Rob; Shabab Farhan N; Chatterjee Shahana; Anilkumar Amrutur V; Pint Cary L^*

来源：Nano Letters, 2014, 14(6): 3197-3202.

DOI：10.1021/nl500531r

• Supercapacitor
• load-bearing
• porous silicon
• poly(ethylene oxide)
• ionic liquids
• solid state
• multifunctional energy storage

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.

• 出版日期2014-6