Abstract
The porous carbon was derived from the roots of Nelumbo nucifera by a one-step carbonization process. Different weight percentages (5, 10, 15 and 20 wt%) of prepared biomass-derived carbon (BMC) was composited with poly(phthalazinone ether sulfone ketone)(PPESK) copolymer and used as the surface modifier for commercial glass fiber (GF) membrane to hinder the shuttling effect of polysulfide intermediates. The initial discharge capacity of 1683 mAh g−1 at 0.2 C is observed for PPESK/15% BMC@GF used Li-S cells. Moreover, the capacity of 519.4 mAh g−1 was retained even after 200 cycles. Hence, BMC from Nelumbo nucifera can be an excellent candidate to suppress the polysulfide intermediates in Li-S batteries.
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