Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1558285 | New Carbon Materials | 2015 | 5 Pages |
Abstract
Mesoporous carbon (MC) was prepared from rice husk (RH) by a simple and template-free method which combines H3PO4 activation with a pretreatment of the RH with a NaOH solution and pre-oxidation in air. The pretreatment of RH with NaOH removes silicon and damages the crystal structure of the cellulose in the RH, both of which are beneficial to the preparation of MC with a high surface area and high mesoporosity. The MC has a specific surface area of 2009 m2 gâ1 and a mesoporosity of 90.8%. Its specific capacitance can reach 176 F gâ1 at a current density of 50 mA gâ1, and a value of 126 F gâ1 is retained at 1000 mA gâ1, indicating an excellent rate capability. A MC electrode has a stable specific capacitance of about 150 F/g at 200 mA g-1 with no apparent capacitance fade after 1000 cycles, indicating good electrochemical stability.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Chemistry
Authors
Ming-bo Wu, Ling-yan Li, Jun Liu, Yang Li, Pei-pei Ai, Wen-ting Wu, Jing-tang Zheng,