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Structural and electrochemical characteristics of pyrolytic carbons deposited in porous substrates using pressure-pulsed chemical vapor infiltration technique
Get PDF"Pyrolytic carbon (pyrocarbon) was infiltrated into the porous carbon substrate {sample (A)} and the TiN-coated porous carbon substrate {sample (B)} using pressure-pulsed chemical vapor infiltration technique. The sort of substrates affected the nano-structure of pyrocarbon. Pyrocarbon in sample (A) had the relatively high crystallinity and laminar structure, whereas pyrocarbon in sample (B) was disordered. The capacity of pyrocarbon in sample (B) was higher than that of sample (A), reflecting the disordered structure of pyrocarbon film (B). However, sample (A) showed higher Coulombic efficiency at first cycle (i.e. 87 %) than that of sample (B), which would result from the high crystallinity, laminar structure and low surface area of pyrocarbon in sample (A).
