Horizontally aligned lamellar porous graphene/nickel composite for high volumetric capacity lithium-sulfur batteries

Recent advancements in 3D porous graphene-based electrode materials for electrochemical energy storage applications

“…8A and Table 1). 63 The densely stacked network (Fig. 8A-b-d) exhibits excellent electronic and ionic conductivity; thus, the cathode material provides a large gravimetric and volumetric capacity of around 718.7 mA h g À1 and 884.0 mA h cm À3 at 0.1C (as tabulated in Table 2), respectively.…”

“…The uniform distribution of VN in the porous graphene network would be one possible reason for such excellent electrochemical performance. Another study was reported by Zhang et al on enhancing the volumetric capacitance of lamellar porous graphene by combining it with nickel (LPG-Ni) later doped with sulfur (LPG-Ni/S) and prepared as a cathode material for LSB application (refer Fig.8Aand Table1)[63]. The densely stacked network (Fig.8A.b-d) exhibits excellent electronic and ionic conductivity; thus, the cathode material provides a large gravimetric and volumetric capacity of around 718.7 mAh g -1 and 884.0 mAh cm -3 at 0.1 C (as tabulated in Table2), respectively.…”

Hierarchical Porous and Three-Dimensional MXene/SiO2 Hybrid Aerogel through a Sol-Gel Approach for Lithium–Sulfur Batteries

“…Among energy storage applications, lithium–sulfur batteries (LSBs), as the next-generation inspiring devices, have shown the attractive potential by virtue of high energy density (up to 2600 Wh kg –1 ), environmental benignancy, and reduced cost [ 2 ]. Although significant progress has been made, its large-scale implementation still faces many problems, in particular, mechanical degradation of the cathode because of the huge volume change (nearly 80%) in the process of discharging and charging, the inherent insulation property of sulfur, and the loss of active substances (resulting in shuttle effect of soluble polysulfides) [ 3 , 4 ]. The main obstacle behind the poor battery performance is the dissolution and “shuttle effect” of intermediate polysulfides, which begins with the battery discharge process [ 5 , 6 ].…”