Synthesis of porous-carbon@reduced graphene oxide with superior electrochemical behaviors for lithium-sulfur batteries

Nanosheet-like porous-carbon@reduced graphene oxide (PC@rGO) composite is successfully prepared via a facile soaking and freeze-drying process followed by heat treatment. The structural and morphological characterizations demonstrate that the porous-carbon is homogenously embedded with rGO. When employed as a cathode material for Li-S batteries, the electrode delivers a high capacity of 634 mAh g(-1) at 1.0 A g(-1) after 100 cycles. Moreover, the reversible capacities of the composites reached 871, 792 and 694 mAh g(-1) at 0.2, 0.5 and 1.0 A g(-1), respectively. The outstanding electrochemical performance of the composites demonstrates a promising direction for research on superior high energy density Li-S batteries. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

A nanosheet-like porous-carbon@reduced graphene oxide (PC@rGO) composite was prepared successfully via a facile method, showing high capacity and reversible capacity in Li-S batteries, indicating a promising direction for research on high energy density Li-S batteries.