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[½»Á÷] ´óÅ£Di Zhang×îг¬¼¶µçÈÝÆ÷Á¦×÷£¨ACS Nano£¬2015Äê10ÔÂ06ÈÕ£© ÒÑÓÐ1È˲ÎÓë

ÌâÄ¿£º¡°Egg-Box¡±-Assisted Fabrication of Porous Carbon with Small Mesopores for High-Rate Electric Double Layer Capacitors

×÷ÕߣºDanmiao Kang, Qinglei Liu*, Jiajun Gu, Yishi Su, Wang Zhang, and Di Zhang* £¨ÉϽ»´óÅ££©
         State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People¡¯s Republic of China

ÕªÒª£ºHere we report a method to fabricate porous carbon with small mesopores around 2¨C4 nm by simple activation of charcoals derived from carbonization of seaweed consisting of microcrystalline domains formed by the ¡°egg-box¡± model. The existence of mesopores in charcoals leads to a high specific surface area up to 3270 m2 g¨C1, with 95% surface area provided by small mesopores. This special pore structure shows high adaptability when used as electrode materials for an electric double layer capacitor, especially at high charge¨Cdischarge rate. The gravimetric capacitance values of the porous carbon are 425 and 210 F g¨C1 and volumetric capacitance values are 242 and 120 F cm¨C3 in 1 M H2SO4 and 1 M TEA BF4/AN, respectively. The capacitances even remain at 280 F g¨C1 (160 F cm¨C3) at 100 A g¨C1 and 156 F g¨C1 (90 F cm¨C3) at 50 A g¨C1 in the aqueous and organic electrolytes, demonstrating excellent high-rate capacitive performance.´óÅ£Di Zhang×îг¬¼¶µçÈÝÆ÷Á¦×÷£¨ACS Nano£¬2015Äê10ÔÂ06ÈÕ£©
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  • ¸½¼þ 1 : DiZhang_ACSNano_2015.pdf
  • 2015-10-06 10:22:35, 8.67 M

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