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    					Electrospun porous carbon nanofibers derived from bio-based phenolic resins as free-standing electrodes for high-performance supercapacitors  | 
  					 
  					  										
						Yongsheng Zhang1, Xiaomeng Yang1, Jinpan Bao1, Hang Qian1, Dong Sui2, Jianshe Wang1, Chunbao Charles Xu3( ), Yanfang Huang1( ) | 
					 
															
						1. School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China 2. School of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China 3. Department of Chemical and Biochemical Engineering, Western University, London, N6A 3K7, Canada | 
					 
										
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													     		                            						                            																	    Abstract  Phenolic resins were employed to prepare electrospun porous carbon nanofibers with a high specific surface area as free-standing electrodes for high-performance supercapacitors. However, the sustainable development of conventional phenolic resin has been challenged by petroleum-based phenol and formaldehyde. Lignin with abundant phenolic hydroxyl groups is the main non-petroleum resource that can provide renewable aromatic compounds. Hence, lignin, phenol, and furfural were used to synthesize bio-based phenolic resins, and the activated carbon nanofibers were obtained by electrospinning and one-step carbonization activation. Fourier transform infrared and differential scanning calorimetry were used to characterize the structural and thermal properties. The results reveal that the apparent activation energy of the curing reaction is 89.21 kJ·mol–1 and the reaction order is 0.78. The activated carbon nanofibers show a uniform diameter, specific surface area up to 1100 m2·g–1, and total pore volume of 0.62 cm3·g–1. The electrode demonstrates a specific capacitance of 238 F·g–1 (0.1 A·g–1) and good rate capability. The symmetric supercapacitor yields a high energy density of 26.39 W·h·kg–1 at 100 W·kg–1 and an excellent capacitance retention of 98% after 10000 cycles. These results confirm that the activated carbon nanofiber from bio-based phenolic resins can be applied as electrode material for high-performance supercapacitors. 
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															| Keywords 
																																																				lignin  
																		  																																				bio-based phenolic resins  
																		  																																				electrospinning  
																		  																																				activated carbon nanofibers  
																		  																																				supercapacitors  
																																			  
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																																Corresponding Author(s):
																Chunbao Charles Xu,Yanfang Huang   
																													     		
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															| About author:  *These authors equally shared correspondence to this manuscript.  | 
														 
																												
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																																														Online First Date: 28 February 2023   
																																														Issue Date: 28 April 2023
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