A Facile Route for Preparation of High-Performance Hierarchical Porous Carbons for Supercapacitor Electrodes

Lili Wang
2016 International Journal of Electrochemical Science  
In this work, a facile route for preparation of high-performance hierarchical porous carbons from starch was described. The hierarchical porous carbons with developed micropores and mesopores were prepared, and the pore size was distributed at 2, 9 and 13 nm. The high-performance porous carbons with specific capacity of 221 F/g was obtained when the mass ratio of starch to zinc nitrate was 1:1 and the carbonization temperature was 800 o C. It also possessed excellent specific capacitance
more » ... capacitance retention about 96.4 % of the initial value even after 5000 cycles, and the higher capacitance retention of 88.7% was obtained when the current density changing from 0.2 to 2 A/g. The pore structure and the electrochemical performance could be tuned by changing the reaction conditions. The experimental results suggested the hierarchical porous carbons could be an ideal candidate for supercapacitor applications.
doi:10.20964/2016.07.27 fatcat:z7ndjhsr3vhdxjy37wqqgfzpve