In‐situ Generated Ultra‐High Dispersion Sulfur 3D‐Graphene Foam for All‐Solid‐State Lithium Sulfur Batteries with High Cell‐Level Energy Density

Abstract

In this study, we prepared a free‐standing ultra‐high dispersion sulfur three‐dimensional graphene (S‐3DG) foam by a simple in‐situ synthesis method. The HRTEM and SAED test of the discharged and charged products showed reversible conversion of Li2S and S during cycling. All‐solid‐state Li−S batteries with 55% sulfur content can reach initial discharge capacity of 1680 mAh g−1 at 1/16 C and 410 mAh g−1 at 4 C. And the capacity was about 450 mAh g−1 after 20 times cycling tested at 1/8 C. Moreover, Li−S batteries with 80% sulfur loading (8 mg/cm2) exhibited a superior cell‐level energy density of 588.8 Wh kg−1.

A review of all‐solid‐state lithium‐selenium batteries

“…The two precursors were mixed in appropriate proportions and stirred at 150°C to obtain a uniform liquid at RT. [113][114][115] 2LiIHPN-LiI has a unique property with heat liquefiable, 109 that exhibits high infiltration ability for 3D graphene 116 and could show the excellent Li + transmission route for extremely dispersible Se at the surface of graphene, 117 which is fit well of exploring new ASSLSeBs. In addition, the researchers successfully prepared amorphous Se graphene cathode (a-Se/rGO) through an in situ generation method.…”

Tuning ionic conductivity to enable all-climate solid-state Li–S batteries with superior performances

“…[1][2][3] Lithium-sulfur (Li-S) batteries have attracted great attentions due to the high theoretical specific capacity of sulfur (~1675 mAh/g). [4][5][6][7][8][9][10] However, during the charge and discharge process, the S cathode quickly generates polysulfides that are soluble in the liquid electrolyte, forming a shuttle effect between the cathode and anode, resulting in low coulombic efficiency and short span life of lithium-sulfur batteries. [11][12][13][14] Replacing the liquid electrolyte with solid electrolyte to fabricate solid-state batteries can physically block polysulfides, avoid the shuttle effect, and improve safety and energy density.…”

Amorphous Selenium and Crystalline Selenium Nanorods Graphene Composites as Cathode Materials for All‐Solid‐State Lithium Selenium Batteries

“… [5] All solid lithium−sulfur batteries can eliminate the shuttle effect of soluble polysulfide compounds, inhibit the growth of lithium dendrites, and overcome the challenges of electrolyte leakage and combustion. [6] However, its practical applications are still limited by solid electrolyte with high hardness, as well as large stress and high interfacial resistance caused by the volume expansion of sulfur. [7] In addition, sulfur has electronic conductivity of 5×10 −28 S m −1 , which is not conducive to rapid charge transfer and reaction kinetics.…”

“…In order to solve these problems, all solid state lithium−sulfur batteries have been developing rapidly in recent years [5] . All solid lithium−sulfur batteries can eliminate the shuttle effect of soluble polysulfide compounds, inhibit the growth of lithium dendrites, and overcome the challenges of electrolyte leakage and combustion [6] . However, its practical applications are still limited by solid electrolyte with high hardness, as well as large stress and high interfacial resistance caused by the volume expansion of sulfur [7] .…”

“…The solid electrolyte 2LiIHPN−LiI is a special type of electrolyte with heat liquefiable property [19] . After liquefaction, it has good infiltration ability for three‐dimensional graphene [20] and can provide excellent lithium ion transmission path for highly dispersible selenium on the surface of graphene, [21] which is very suitable for studying new all‐solid‐state lithium−selenium battery [6] . Furthermore, the mechanism of all‐solid‐state lithium−selenium battery in charge and discharge process was studied.…”