Bimodal mesoporous carbons-PMo12 composites for supercapacitors

EDUARDO FUENTES-QUEZADA; DIANA MARTÍNEZ CASILLAS; EZEQUIEL DE LA LLAVE; A. CUENTAS GALLEGOS

Congreso; Energy Storage Discussions 2019; 2019

Bimodal mesoporous carbons were synthesized by use of double pore forming method and resorcinol-formaldehyde resin as a precursor. Poly-diallyldimethylammonium chloride (pDADMAC) and commercial silica (Sipernat® 50) were used as structuring agent and hard template, respectively [1-2]. Through the proposed procedure carbon powder with bimodal mesoporous size distribution (around 4-5 nm and 20-40 nm) and different pore volume ratios can be obtained, by changing the ratio pDADMAC/silica used in the synthesis. Pore volumes between 0.70 and 2.10 cm3g-, and specific surface areas between 662 to 998 m2g-1 were obtained.The incorporation of PMo12 into the carbon matrix was carried out by a very simple method. The relationship between PMo12 adsorption and carbon structure was analyzed. Carbon with a higher amount of mesoporous < 10 nm showed the highest PMo12 loading, reaching a pseudocapacitance of 326 F·g-1 , 120% larger than the pristine material, as seen in figure 1. Finally, all materials showed great stability up to 3,000 galvanostatic chargedischarge cycles.