High-Performance Anode of Sodium Ion Battery from Polyacrylonitrile/Humic Acid Composite Electrospun Carbon Fibers. (1st April 2017)

• Record Type: Journal Article
• Authors: Zhao, Pin-Yi; Yu, Bao-Jun; Sun, Shuai; Guo, Yan; Chang, Zhen-Zhen; Li, Qi; Wang, Cheng-Yang
• Is Part Of: Electrochimica acta. Volume 232(2017)
• Page Start: 348
• Page End: 356
• Publication Date: 2017-04-01
• Subjects: Humic acid -- Carbon fibers -- Sodium ion batteries -- Electrospinning; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.02.159
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: Biomass humic acid is characterized before preparation for carbon fibers. H-CFs are successfully applied as high-performance anode materials in sodium-ion batteries. Good storage capacity and stable cycling behavior are obtained by virtue of composite network. Abstract: Humic acid is creatively selected as an anode material in sodium ion batteries. Bio-based carbon fibers (H-CF) are fabricated from polyacrylonitrile (PAN) − humic acid (HA) via simple eletrospinning followed by stabilization and carbonization. The heat-treatment temperature (HTT) is optimized based on analysis of material structures and electrochemical performances. Due to unique composite networks and oxygenic functionalities, the H-CF anode obtained at 1300 °C has a large reversible capacity of 261.3 mAh g −1 (current density: 0.02 A g −1, initial efficiency: 69.6%). The anode also presents good cycle stability (249.6 mAh g −1 reversible capacity at 0.1 A g −1 with capacity retention of 92.8% over 100 cycles) and good rate capability (208.6 mAh g −1 at 0.2 A g −1 and 81.7 mAh g −1 at 1 A g −1 ). It is proved that humic acid can serve as a robust precursor for high-performance anode of sodium ion batteries.