Toward Practical All-solid-state Batteries with Sulfide Electrolyte: A Review

Sulfide-based solid-state electrolytes with ultrahigh lithium ion conductivities have been considered as the most promising electrolyte system to enable practical all-solid-state batteries. However, the practical applications of the sulfide-based all-solid-state batteries are hindered by severe interfacial issues as well as large-scale material preparation and battery fabrication problems. Liquid-involved interfacial treatments and preparation processes compatible with current battery manufacturing capable of improving electrode/electrolyte interface contacts and realizing the mass production of sulfide electrolytes and the scalable fabrication of sulfide-based battery component have attracted considerable attention. In this perspective, the current advances in liquid-involved treatments and processes in sulfide-based all-solid-state batteries are summarized. Then relative chemical mechanisms and existing challenges are included. Finally, future guidance is also proposed for sulfide-based batteries. Focusing on the sulfide-based all-solid-state batteries, we aim at providing a fresh insight on understandings towards liquid-involved processes and promoting the development of all-solid-state batteries with higher energy density and better safety.     

Sulfide-assisted growth of silicon nano-wires by thermal evaporation of sulfur powders

Silicon nanowires (SiNWs) with a diameter of 20 nm were synthesized by the thermal evaporation of sulfur powders on silicon wafers. The source of the SiNWs came from the silicon substrates. It is considered that the generated SiS compound assisted the formation of SiNWs. Finally, the Raman shift of SiNWs was discussed.     

NETWORK CROWN ETHER POLYMERS WITH CENTRIC FUNCTIONAL GROUPS．Ⅱ．SYNTHESIS OF NETWORK CROWN ETHER POLYMER WITH PENDANT SULFIDE SIDE CHAIN AND ITS PLATINUM COMPLEX

ＮＥＴＷＯＲＫＣＲＯＷＮＥＴＨＥＲＰＯＬＹＭＥＲＳＷＩＴＨＣＥＮＴＲＩＣＦＵＮＣＴＩＯＮＡＬＧＲＯＵＰＳ．Ⅱ．ＳＹＮＴＨＥＳＩＳＯＦＮＥＴＷＯＲＫＣＲＯＷＮＥＴＨＥＲＰＯＬＹＭＥＲ　ＷＩＴＨ　ＰＥＮＤＡＮＴ　ＳＵＬＦＩＤＥ　ＳＩＤＥ　ＣＨＡＩＮ　ＡＮ...     

Conductivity studies on LiX–Li2S–Sb2S3–P2S5 (X = LiI or Li3PO4) glassy system

New sulfide glasses in the Li₂S–Sb₂S₃–P₂S₅ system have been prepared by classical quenching technique where glassy domain remains up to 50% molar addition of Li₂S and electrical conductivities have been determined by impedance spectroscopy. Room temperature DC conductivity vs Li₂S content exhibits two regions implying different conductivity mechanisms. The compositions of low lithium content presented low electronic conductivities close to 0.01 μS/cm at room temperature (due to Sb₂S₃ semiconducting properties). The compositions of medium lithium content could result to mixed ionic–electronic conductors with predominant ionic conductivity with a maximum close to 1 μS/cm; Arrhenius behavior is found between 25 °C and T _g for all glasses, but activation energy is found to be somehow above most similar systems. A comparative study with glasses belonging to the other chalcogenide systems has been undertaken and values of the decoupling index are reported, and in order to validate conductivity data, a circuit equivalent circuit was proposed and fitted parameters were calculated with good agreement.