Template-free preparation of mesoporous carbon from rice husks for use in supercapacitors
Source abstract
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 g−1 and a mesoporosity of 90.8%. Its specific capacitance can reach 176 F g−1 at a current density of 50 mA g−1, and a value of 126 F g−1 is retained at 1000 mA g−1, 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.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Advancements in Battery Materials · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (20)
Show source-provided references
1. Rice husk-derived porous carbons with high capacitance by ZnCl2 activation for supercapacitors[J]10.1016/j.electacta.2013.05.050 ↗
2. Conway · 1999
3. The effect of the HClO4 oxidization of petroleum coke on the properties of the resulting activated carbon for use in supercapacitors[J]10.1016/S1872-5805(13)60080-3 ↗
4. The preparation of graphene decorated with manganese dioxide nanoparticles by electrostatic adsorption for use in supercapacitors[J]10.1016/j.carbon.2012.06.033 ↗
5. Synthesis of starch-derived mesoporous carbon for electric double layer capacitor[J]10.1016/j.cej.2014.02.023 ↗
6. Efficient preparation of biomass-based mesoporous carbons for supercapacitors with both high energy density and high power density[J]10.1016/j.jpowsour.2013.03.174 ↗
7. The influence of nitric acid oxidation on the electrochemical performance of asphaltene-based ordered mesoporous carbon[J]
8. The electrochemical properties of templated and activated mesoporous carbons produced from coal pitch[J]
9. Electrochemical performance of graphene/carbon electrode contained well-balanced micro- and mesopores by activation-free method[J]10.1016/j.electacta.2012.01.009 ↗
10. Preparation of mesoporous carbon microsphere/activated carbon composite for electric double-layer capacitors[J]10.1016/S1872-5805(11)60079-6 ↗
11. Cooperation of micro- and meso-porous carbon electrode materials in electric double-layer capacitors[J]10.1016/j.jpowsour.2010.01.041 ↗
12. A simple method of preparing ordered and three-dimensionally interconnected macroporous carbon with mesoporosity by using silica template[J]10.1016/j.matlet.2011.04.101 ↗
13. SBA-15 templated mesoporous carbons for 2,4-dichlorophenoxyacetic acid removal[J]10.1016/j.cej.2012.12.024 ↗
14. Porous MnO2 for use in a high performance supercapacitor: replication of a 3D graphene network as a reactive template[J]10.1039/c3cc46867d ↗
15. Nickel hydroxide/activated carbon composite electrodes for electrochemical capacitors10.1016/j.jpowsour.2006.09.066 ↗
16. High performance supercapacitors using metal oxide anchored graphene nanosheet electrodes10.1039/c1jm12963e ↗
17. Graphene/SnO2/polypyrrole ternary nanocomposites as supercapacitor electrode materials10.1039/c2ra21292g ↗
18. Synthesis of micro- and mesoporous carbon spheres for supercapacitor electrode10.1007/s10008-013-2110-7 ↗
19. 3D aperiodic hierarchical porous graphitic carbon material for high-rate electrochemical capacitive energy storage10.1002/anie.200702721 ↗
20. Controlled synthesis of mesoporous carbon nanosheets and their enhanced supercapacitive performance10.1007/s10008-013-2025-3 ↗