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    					Nickel nanopore arrays as promising current collectors for constructing solid-state supercapacitors with ultrahigh rate performance  | 
  					 
  					  										
						Huaping Zhao, Long Liu, Yaoguo Fang, Ranjith Vellacheri, Yong Lei( ) | 
					 
															
						| Institute of Physics and IMN MacroNano®, Ilmenau University of Technology, Ilmenau 98693, Germany | 
					 
										
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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. 
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															| Keywords 
																																																				supercapacitor  
																		  																																				ultrahigh rate  
																		  																																				metallic nanopore arrays  
																		  																																				current collectors  
																		  																																				PEDOT  
																																			  
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																																Corresponding Author(s):
																Yong Lei   
																													     		
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																															Just Accepted Date: 21 December 2017  
																																														Online First Date: 20 March 2018   
																																														Issue Date: 18 September 2018
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