Double layer capacitance of high surface area carbon nanospheres derived from resorcinol-formaldehyde polymers

作者：Tashima Daisuke^*; Yamamoto Eri; Kai Nanami; Fujikawa Daisuke; Sakai Go; Otsubo Masahisa; Kijima Tsuyoshi

来源：Carbon, 2011, 49(14): 4848-4857.

DOI：10.1016/j.carbon.2011.07.005

Micro-mesoporous bimodal carbon nanospheres with high surface areas were synthesized by a combined use of surfactant templating technique and BaO(2) chemical activation one. Starting spherical nanopolymer/surfactant composites were prepared by the NaOH-catalyzed reaction of resorcinol (R) and formaldehyde (F) in the presence of cetyltrimethylammonium bromide (CTAB) as a core template and 1,3,5-trimethylbenzene (TMB) and tert-butanol (t-BuOH) as cosurfactants. After pretreatment with hydrochloric acid, the composite materials were calcined at 1000 degrees C in N(2) coexistent with varying weight ratios of BaO(2) to RF polymer ranging from 0 to 11. It produced micro-mesoporous bimodal carbon nanospheres of 124-143 nm diameter, with specific surface areas as high as 1884 m(2) g(-1) or up to 3301 m(2) g(-1), in contrast to microporous ones with smaller surface areas obtained at low BaO(2)-loadings. The electrochemical double layer capacitance of the resulting nanocarbons in 0.5 M H(2)SO(4) showed a marked increase with specific surface areas, up to as high as 219 F g(-1) for the highest surface area carbon material.

• 出版日期2011-11