화학공학소재연구정보센터
Electrochimica Acta, Vol.283, 401-409, 2018
In situ growth of beta-FeOOH on hierarchically porous carbon as anodes for high-performance lithium-ion batteries
Sugarcane bagasse, a waste product of the sugarcane industry can be used as a precursor for the preparation of carbon. In this study, a composite consisting of hierarchically functionalized porous carbon (FPC) and beta-FeOOH was synthesized via a simple and effective hydrolysis method. The hydrothermal process before the carbonization and activation of the bagasse maintained the hierarchical interconnected porous structure of the sugarcane bagasse. A nitric acid (HNO3) functionalization treatment enabled an in-situ growth of beta-FeOOH on the hierarchically structured bagasse. When tested as an anode for lithium-ion batteries, the obtained FPC/beta-FeOOH composite showed a high discharge capacity of 898.8 mAh g(-1) at 0.2 A g(-1) after 350 cycles and achieved a specific capacity of 446.1 mAh g(-1) at a current rate of 1 Ag-1 after 1000 cycles together with a remarkable coulombic efficiency of 99.9%. This excellent electrochemical performance of the FPC/beta-FeOOH composite can be attributed to the synergistic effect of the interconnected porous structure of porous carbon and the electrochemically active tunnel type beta-FeOOH nanorods. The strategy developed here is promising in design and fabrication of other composites having interconnected porous structures with high performance. (C) 2018 Elsevier Ltd. All rights reserved.