Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6579363 | Chemical Engineering Journal | 2018 | 11 Pages |
Abstract
Novel 1-D tube-in-tube structured NiO nanobelts were prepared by electrospinning process and subsequent one-step thermal treatment process. Nanobelt structured 1-D composite was electrospun from an aqueous solution containing poly(vinylpyrrolidone), citric acid, and dextrin which synergistically contributed to morphology control. The chemicals that optimized surface tension and viscosity of the aqueous solution enabled stable electrospinning process. Especially, dextrin played an important role in stable nanobelt formation due to its hygroscopic nature. During one-step oxidation process, the polymer composited nanobelt turned into carbon-free NiO@void@NiO tube-in-tube structured nanobelt by repeated combustion and contraction processes and Ostwald ripening mechanism. NiO tube-in-tube nanobelt prepared at 400â¯Â°C showed superior lithium-ion storage performances compared to those of NiO-C nanobelt and porous NiO nanobelt obtained at 300 and 500â¯Â°C, respectively. The discharge capacity of the tube-in-tube structured nanobelts after the 200th cycle at a current density of 1.0â¯Aâ¯gâ1 was 992â¯mAâ¯hâ¯gâ1. Also, high discharge capacity of 531â¯mAâ¯hâ¯gâ1 at a current density of 10.0â¯Aâ¯gâ1 proved its excellent power density. High structural stability and morphological benefits of tube-in-tube nanobelts resulted in superior lithium storage performance.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Se Hwan Oh, Jin-Sung Park, Min Su Jo, Yun Chan Kang, Jung Sang Cho,