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Overview: Commercial carbon cloth as a substrate for practical lithium metal batteries

  Background Although lithium-ion batteries have been researched for more than three decades, their limited energy density still cannot meet the range anxiety of current electric vehicles to some extent. Therefore, developing safe, reliable, low-cost, and high-energy density batteries has become a priority.   Among them, the theoretical capacity of lithium metal anodes is as high as 3860.0 mAh/g, and the redox potential is as low as −3.040 V (vs. standard hydrogen electrode, SHE), which has attracted much attention from researchers and enterprises.   However, lithium metal anodes still face many challenges in practical applications, such as uneven lithium deposition, unstable solid electrolyte interface (SEI), and constant volume changes during cycling.   In order to solve the above problems, researchers have developed various methods, such as introducing 3D host materials, constructing artificial solid electrode interfaces, and designing solid-state electrolytes. ...

Fluorine-rich shell coating of Li6PS5Cl solid electrolyte: improves air stability

  Background All-solid-state batteries (ASSBs) are considered ideal for next-generation energy storage systems due to their high energy density and safety. Among them, sulfide solid electrolytes (such as Li6 PS5 Cl , LPSCl) with sulfur silver germanium ore structure have become key candidate materials for ASSBs due to their high ionic conductivity, low electronic conductivity and good ductility. However, its side reaction with moisture in the air can produce toxic H2S gas, leading to structural decomposition, decreased ionic conductivity, and increased electronic conductivity, severely restricting the commercialization of ASSBs. Although stability can be improved by elemental substitution (e.g., replacing P 5+  with soft acids) or oxygen doping, existing studies have ignored the changes in electron conductivity and its effect on lithium dendrite growth. In this study, fluorine-rich LPSCl (F-LPSCl) with core-shell structure was prepared by chemical vapor deposition fluorin...