Porous carbon foams were prepared by pyrolysis of phenolic resin from a dual template approach, using porous silica monoliths[1] as hard templates and triblock copolymers as soft templating agents. Macroporosity of 50-80% arose from the silica foam hard template, while the soft template generated micro- or mesoporosity, according to the operating procedure. The final materials exhibit BET specific surface areas of 400-900 m2�g-1, depending on the use or not of non-ionic surfactant during the synthesis[2].Their performances as Li-sulfide battery negative electrodes were investigated, and one of the sample was found to present more than 1000 mA�h�g-1 (150 mA�h�cm-3) of remnant capacity after 50 cycles, an unprecedented performance.We will discuss the importance of porosity on the performances of these materials as lithium-sulfur batteries electrodes, and explore the effects that metallic nanoparticles may have on enhancing the cycling capacity of these materials. Figure 1. <img src='https://acs-archive-assets2.s3.amazonaws.com/241nm/uploads/70396_rotorsquarecartoon.jpg' alt='' />[1] Carn, F.; Colin, A.; Achard, M.-F.; Deleuze, H.; Birot, M.; Backov, R. J. Mater. Chem. 2004, 14, 1370[2] N. Brun, S.R.S. Prabaharan, M. Morcrette, C. Sanchez, G. P�castaings, A. Derr�, A. Soum, H. Deleuze, M. Birot and R. Backov,Adv. Funct. Mater. 2009, 29, 19, 3136

Carbonaceous macrocellular foams as novel electrodes for stable performant lithium-sulfur batteries

248th National Meeting (2014)

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