Incorporation of lithium halogen in Li7P3S11 glass-ceramic and the interface improvement mechanism

Designed anion and cation co-doped Na3Sb(WM)xS4 (M = Cl, Br, I) sulfide electrolytes with an improved conductivity and stable interfacial qualities

“…With the doping of halogens into the sample, the diffraction peak gradually shifts to the left, and the movement of the diffraction peak position indicates that the sample lattice volume expands after doping. 13 And because of the partial substitution of the halogen for the S atom, some glass-ceramic structures can also be seen in the XRD. This trend was apparently associated with the ionic radii and electronegativity of the three doped halogen elements.…”

Li metal anode interface in sulfide‐based all‐solid‐state Li batteries

“…As shown in Table 2, doping elements can be divided into halogen and metal elements, which can be used to replace S and P elements in SSEs, respectively. Some studies have substituted S and P simultaneously 33,143–148 …”

Progress and Perspective of Glass-Ceramic Solid-State Electrolytes for Lithium Batteries

“…Tatsumisago et al [ 112 ] systematically investigated the doping effect of LiX (X = F, Cl, Br, I) on Li 7 P 3 S 11 , and their results showed that the doping with LiBr was most effective in enhancing the ionic conductivity of Li 7 P 3 S 11 glass-ceramic SSEs. Further study by Zhao et al [ 113 ] showed that LiBr does not enter the lattice but exists in the interstices between the Li 7 P 3 S 11 lattice. The high electronegativity of Br reduces the electron cloud density on the surface of P 2 S 7 4− and PS 4 3− units, decreasing their binding to Li + , and, thus, increasing the ionic conductivity.…”

“…For sulfide glass-ceramic SSEs, the enhancement of the interfacial properties relies mainly on the structural modification by the dopants such as Fe 2 S [ 107 ], LiBr [ 113 ], LiNO 3 [ 98 ], LiI [ 109 ] and SeS 2 [ 140 ]. In the previous section, we focused on the performance improvement of LPS glass-ceramic SSEs, so here we only present its improvement in interfacial properties.…”