2018, Volume 12, Issue 3
Frontiers of Chemical Science and Engineering >> 2018, Volume 12, Issue 3 doi: 10.1007/s11705-018-1699-6
Nickel nanopore arrays as promising current collectors for constructing solid-state supercapacitors with ultrahigh rate performance
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Abstract
In this work, nickel nanopore arrays with a highly-oriented nanoporous structure inherited from porous alumina membranes were used as nanostructured current collectors for constructing ultrahigh rate solid-state supercapacitors. A thin layer of poly(3,4-ethylenedioxythiophene) (PEDOT) as electroactive materials was conformally coated onto nickel nanopores to form heterostructured electrodes. The as-prepared electrodes have a large specific surface area to ensure a high capacity, and the highly-oriented nanoporous structure of nickel nanopores reduces the ion transport resistance, allowing the ions in the solid-state electrolytes to quickly access the PEDOT surface during the fast charge-discharge process. As a result, the assembled solid-state supercapacitor in a symmetric configuration exhibits an ideal capacitive behavior and a superior rate capability even at an ultrahigh scan rate of 50 V·s−1.
Keywords
supercapacitor ; ultrahigh rate ; metallic nanopore arrays ; current collectors ; PEDOT
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