Biotechnology humic acids-based electrospun carbon nanofibers as cost-efficient electrodes for lithium-ion batteries
Pin-Yi Zhao, Yan Guo, Bao-Jun Yu, Jie Zhang, Cheng-Yang Wang
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
Bio-based, cost-effective carbon nanofibers are fabricated from polyacrylonitrile (PAN) – refined biotechnology humic acids (RB) via simple eletrospinning after stabilization and carbonization. The influence of PAN/RB mass ratios and heat-treatment temperatures (HTTs) on structure and morphology is systematically studied. Excitingly, a first discharge/charge capacity of 937.9/613.4 mAh g-1(coulombic efficiency of 65.4%) is achieved at 20 mA g-1 for PB7/3-800 in lithium-ion batteries (LIBs). Meanwhile, a charge capacity of 348.2 mAh g-1 (about 89% retention ratio) remains even after 100 cycles at 0.1 A g-1. It is demonstrated that biomass humic acids can be applied as a promising precursor to fabricate high performance, low-cost, as well as “green” carbon electrode material for LIBs.
Keywords: Biotechnology humic acids; Carbon nanofibers; Electrospinning; Lithium-ion batteries.