Li4-Sb Sn1-S4 solid solutions for air-stable solid electrolytes

Superior All‐Solid‐State Batteries Enabled by a Gas‐Phase‐Synthesized Sulfide Electrolyte with Ultrahigh Moisture Stability and Ionic Conductivity

“…Although numerous efforts have been taken to improve the air stability of thiophosphate‐based SEs, the generation of H 2 S and structure and property degradation are still inevitable. In stark contrast to thiophosphate‐based solid electrolytes, the air‐stable Li 4 SnS 4 only produces neglectable amount of H 2 S [ 16 ] and its structure and ionic conductivity could be recovered by heat treatment after water immersion. [ 17 ] However, the ionic conductivity of Li 4 SnS 4 only reaches 7.0 × 10 −5 S cm −1 , [ 17a ] which is still far away from 10 −3 S cm −1 and hard to be applied to ASSBs.…”

“…[ 17 ] However, the ionic conductivity of Li 4 SnS 4 only reaches 7.0 × 10 −5 S cm −1 , [ 17a ] which is still far away from 10 −3 S cm −1 and hard to be applied to ASSBs. Through partial substitution of As and Sb for Sn, the ionic conductivity of obtained products Li 3.833 Sn 0.833 As 0.166 S 4 [ 18 ] and Li 3.85 Sn 0.85 Sb 0.15 S 4 [ 16,19 ] reached 1.39 and 0.85 mS cm −1 , respectively. Unfortunately, the synthesis of these two substituted products has to be conducted in glovebox by using solid‐phase synthesis method with tedious procedures and high cost, which greatly hinders their large‐scale application.…”

Element selection for crystalline inorganic solid discovery guided by unsupervised machine learning of experimentally explored chemistry

“…Maxima in Fig. 4c are observed when Li + jump rates, τ −1 , are on the order of the probe spin-lock frequency ω 1 and obey the relationship 2ω 1 ≈ τ c −1 (where τ c −1 is the correlation rate of the Li motion and is essentially the average τ −1 ) 50 giving jump rate values of the order of 1.8 × 10 5 − 1 × 10 6 s −1 in the 330-355 K temperature range.…”

The Role of Cycle Life on the Environmental Impact of Li6.4La3Zr1.4Ta0.6O12 based Solid‐State Batteries

“…[ 73,74 ] Comparatively, the SSB structure using the LLZTO returns to a reliance on critical REEs, specifically lanthanum. Although the LLZTO is not the only available SSB structure, alternatives such sulphide based systems (Li 4 SnS 4 ‐Li 3 ‐SbS 4 ) [ 75 ] and lithium niobate cathodes with Li 10 GeP 2 S 12 solid electrolytes [ 76 ] also rely on critical materials such as antimony and germanium. Therefore, it is paramount for the environmental impacts of different SSB structures to be compared prior to their commercialisation to ensure that the technology with the lowest environmental impact is preferentially manufactured.…”

“…To date, the most promising process to achieve this is through the development of the cold sintering process. Alternative SSB material structures also exist, such as sulphide based systems based on Li 4 SnS 4 ‐Li 3 ‐SbS 4 [ 75 ] and lithium niobate cathodes with Li 10 GeP 2 S 12 solid electrolytes [ 76 ] and therefore future work should also concentrate on determining which SSB structure leads to the lowest environmental impact.…”