3D porous PTFE membrane filled with PEO-based electrolyte for all solid-state lithium–sulfur batteries

Solid-State Electrolytes for Lithium–Sulfur Batteries: Challenges, Progress, and Strategies

“…The addition of PTFE not only increases the mechanical properties of the electrolytes, but also improves its thermal stability and ionic conductivity. After the introduction of LLZO particles and PTFE skeleton, PEO exhibited a significant decrease in the intensity of two characteristic diffraction peaks at 19° and 23° (2θ), which showed the interaction between PTFE, LLZO, and PEO, increasing the amorphous region of PEO [ 76 ]. Xu et al introduced a Li 7 La 3 Zr 2 O 12 ceramic nanonetwork into the PEO/TPU/LiTFSI matrix at different concentrations via the electrospinning method to study the effects of different concentrations of LLZO on the performance of composite electrolytes.…”

Freestanding TiO2 Nanoparticle-Embedded High Directional Carbon Composite Host for High-Loading Low-Temperature Lithium–Sulfur Batteries

“…Nevertheless, at low temperatures, there are new issues over and above the shuttle effect, such as a strong aggregate of lithium polysulfides (LiPSs), sluggish redox conversion, and low discharge capacity. − Considering the low energy output at low temperatures, increasing the sulfur loading mass is attractive for developing high-energy low-temperature Li–S batteries. Most of the Li–S battery designs that have been disclosed so far have a sulfur content and mass below 2.0 mg cm –2 and 50 wt %. − Some works have increased the sulfur loading above 10.0 mg cm –2 . , However, the main problem of high-loading Li–S batteries is the low sulfur utilization rate due to the accumulation of insulation sulfur and LiPSs. With the increase in the sulfur content in the electrodes prepared by scraping thin slurry on the collector, the thickness of the electrode will inevitably rise, leading to an increased charge transport distance and the introduction of electrically insulating adhesive, thus suffering from mechanical instability, slow charge transfer kinetics, and increased interfacial resistance. , In summary, a decreased temperature, high sulfur mass, and increased thickness of electrodes are the triple barriers to developing low-temperature high-loading Li–S batteries.…”

Interfacial chemistry and ion-transfer mechanism for a tailored poly(thioether)-enabled hybrid solid polymer electrolyte with electrochemical properties in all-solid-state lithium–sulfur batteries

“…24 However, block copolymerization processes are complicated and require restrictive preparation conditions. Nanomaterial fillers, such as nanoparticles (AlF 3 particles), 25 two-dimensional CeF 3 nanoplates, 26 and three-dimensional nano-network fillers (Ce-coordinate polyphenol ellagic acid, 27 C 3 N 4 nanosheet, 28 and PTFE 29 ), have been also used to improve the solid polymer electrolytes' physical and chemical properties. 30,31…”