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A Hierarchical Three-Dimensional Porous Laser-Scribed Graphene Film for Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries
journal contribution
posted on 2020-04-10, 11:36 authored by Eman Alhajji, Wenxi Wang, Wenli Zhang, Husam N. AlshareefThe
lithium–sulfur (Li-S) battery is a promising next-generation
rechargeable battery with high energy density. Given the outstanding
capacities of sulfur (1675 mAh g–1) and lithium
metal (3861 mAh g–1), Li-S battery theoretically
delivers an ultrahigh energy density of 2567 Wh kg–1. However, this energy density cannot be realized due to several
factors, particularly the shuttling of polysulfide intermediates between
the cathode and anode, which causes serious degradation of capacity
and cycling stability of a Li-S battery. In this work, a simple and
scalable route was employed to construct a freestanding laser-scribed
graphene (LSG) interlayer that effectively suppresses the polysulfide
shuttling in Li-S batteries. Thus, a high specific capacity (1160
mAh g–1) with excellent cycling stability (80.4%
capacity retention after 100 cycles) has been achieved due to the
unique structure of hierarchical three-dimensional pores in the freestanding
LSG.