Perovskite-type La_0.56Li_0.33TiO₃as an effective polysulfide promoter for stable lithium–sulfur batteries in lean electrolyte conditions

Abstract

Lithium–sulfur batteries (LSBs) are promising candidates for next-generation energy storage equipment due to their high theoretical energy density.

Catalyzing the polysulfide conversion for promoting lithium sulfur battery performances: A review

“…Quick ion conductor La 0.56 Li 0.33 TiO 3 with perovskite structure reciprocates the excellent electrochemical performances of LSBs due to the favorable interfacial affinity of lithiophilic (O) and sulfiphilic (Ti) sites toward LiPSs as shown in Fig. 13(a) [124]. Besides, the excellent ionic conductivity of 2.94 Â 10 -4 S cm À1 and the outstanding electrocatalytic role for the redox conversion of polysulfides significantly suppress the shuttle effect, accelerate reaction kinetics, and reduce overpotential during charge/discharge process.…”

“…In addition to the simple inorganic compounds, other binary inorganic or organic compounds, such as Perovskite-type structure [124][125][126], metal-organic framework (MOF) [127,128], and covalent organic framework (COF) [129], and MXene [130][131][132][133], have also been explored as effective polysulfide promoter for Li-S batteries.…”

Macroporous Multichannel Carbon Nanofibers Embedded with Co/Fe‐N Electrocatalyst as the Sulfur Host for Boosting Polysulfides Conversion in Lithium‐Sulfur Batteries

“…[3] Aiming at this issue, one of the most common approaches is to infiltrate sulfur into the porous nanostructure to mitigate LiPSs diffusion via physical confinement or chemical adsorption. [4][5][6][7][8][9][10][11][12] However, the weak trapping capability of nonpolar carbon nanostructure toward LiPSs still leads to the severe capacity decay and poor cycle life. In addition, the sluggish kinetics of Li 2 S 2 /Li 2 S nucleation brings about continuous accumulation of LiPSs in electrolytes, result-ing in large polarization and low sulfur utilization rate.…”

“…Among them, the shuttling of LiPSs between the cathode and anode is the main reason for inferior coulombic efficiency and low utilization of active materials [3] . Aiming at this issue, one of the most common approaches is to infiltrate sulfur into the porous nanostructure to mitigate LiPSs diffusion via physical confinement or chemical adsorption [4–12] . However, the weak trapping capability of nonpolar carbon nanostructure toward LiPSs still leads to the severe capacity decay and poor cycle life.…”

Infixing NiS2 nanospheres into a three‐dimensional rGO/CNTs‐Li carbon composite as superior electrocatalyst for high‐performance Li−S batteries

“…The polar inorganic materials with catalytic activity, such as metal‐based oxide/nitride/sulfide and their composites, were widely used to chemically trap LiPSs and synchronously speed up their interconversion. However, the poor electronic conductivity of these compounds leads to the sluggish redox reaction of LiPSs conversion . Hence, the metal catalyst with moderate conductivity and high polarity is highly demanded.…”