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1. On the structure of heptalithium distannide: Li₇Sn₂ or Li_7−xSn₂ (0.3 < x < 0.5)

   https://doi.org/10.1039/D5DT01022E  

   Rahman, Salina; Ghosh, Kowsik; Ovchinnikov, Alexander; Nandakumar, Anirudh; Chan, Candace K; Bobev, Svilen (July 2025, Dalton Transactions)

   New structural insights into Li_7−xSn₂reveal partial/vacant Li occupancy. 

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2. Intricate Li–Sn Disorder in Rare-Earth Metal–Lithium Stannides. Crystal Chemistry of RE ₃ Li _4–x Sn _4+x (RE = La–Nd, Sm; x < 0.3) and Eu ₇ Li _8–x Sn _10+x ( x ≈ 2.0)

   https://doi.org/10.1021/acs.inorgchem.8b00583  

   Suen, Nian-Tzu; Guo, Sheng-Ping; Hoos, James; Bobev, Svilen (April 2018, Inorganic Chemistry)
3. Synthesis of high-purity Li ₂ S nanocrystals via metathesis for solid-state electrolyte applications

   https://doi.org/10.1039/D3TA00076A  

   Smith, William H.; Vaselabadi, Saeed Ahmadi; Wolden, Colin A. (April 2023, Journal of Materials Chemistry A)

   Li 2 S is the key precursor for synthesizing thio-LISICON electrolytes employed in solid state batteries. However, conventional synthesis techniques such as carbothermal reduction of Li 2 SO 4 aren't suitable for the generation of low-cost, high-purity Li 2 S. Metathesis, in which LiCl is reacted with Na 2 S in ethanol, is a scalable synthesis method conducted at ambient conditions. The NaCl byproduct is separated from the resulting Li 2 S solution, and the solvent is removed by evaporation and thermal annealing. However, the annealing process reveals the presence of oxygenated impurities in metathesis Li 2 S that are not usually observed when recovering Li 2 S from ethanol. In this work we investigate the underlying mechanism of impurity formation, finding that they likely derive from the decomposition of alkoxide species that originate from the alcoholysis of the Na 2 S reagent. With this mechanism in mind, several strategies to improve Li 2 S purity are explored. In particular, drying the metathesis Li 2 S under H 2 S at low temperature was most effective, resulting in high-purity Li 2 S while retaining a beneficial nanocrystal morphology (∼10 nm). Argyrodite electrolytes synthesized from this material exhibited essentially identical phase purity, ionic conductivity (3.1 mS cm −1 ), activation energy (0.19 eV), and electronic conductivity (6.4 × 10 −6 mS cm −1 ) as that synthesized from commercially available battery-grade Li 2 S. 

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4. Isolation of Grain versus Intergranular Transport in Li _1+x Ti _x Ta _1–x SiO ₅ Suggests Concerted Ion Migration in a High-Voltage Stable Electrolyte from High-Throughput Descriptors

   https://doi.org/10.1021/acsaem.3c01647  

   Lin, Yu-Ying; Juarez-Yescas, Carlos; Lan, Kai-Wei; Braun, Paul V.; Krogstad, Jessica A.; Perry, Nicola H. (November 2023, ACS Applied Energy Materials)
5. Sr(Ag _1−x Li _x ) ₂ Se ₂ and [Sr ₃ Se ₂ ][(Ag _1−x Li _x ) ₂ Se ₂ ] Tunable Direct Band Gap Semiconductors

   https://doi.org/10.1002/anie.202301191  

   Zhou, Xiuquan; Wilfong, Brandon; Chen, Xinglong; Laing, Craig; Pandey, Indra R.; Chen, Ying‐Pin; Chen, Yu‐Sheng; Chung, Duck‐Young; Kanatzidis, Mercouri G. (February 2023, Angewandte Chemie International Edition)

   Abstract Synthesizing solids in molten fluxes enables the rapid diffusion of soluble species at temperatures lower than in solid‐state reactions, leading to crystal formation of kinetically stable compounds. In this study, we demonstrate the effectiveness of mixed hydroxide and halide fluxes in synthesizing complex Sr/Ag/Se in mixed LiOH/LiCl. We have accessed a series of two‐dimensional Sr(Ag_1−xLi_x)₂Se₂layered phases. With increased LiOH/LiCl ratio or reaction temperature, Li partially substituted Ag to form solid solutions of Sr(Ag_1−xLi_x)₂Se₂withxup to 0.45. In addition, a new type of intergrowth compound [Sr₃Se₂][(Ag_1−xLi_x)₂Se₂] was synthesized upon further reaction of Sr(Ag_1−xLi_x)₂Se₂with SrSe. Both Sr(Ag_1−xLi_x)₂Se₂and [Sr₃Se₂][(Ag_1−xLi_x)₂Se₂] exhibit a direct band gap, which increases with increasing Li substitution (x). Therefore, the band gap of Sr(Ag_1−xLi_x)₂Se₂can be precisely tuned via fine‐tuningxthat is controlled by only the flux ratio and temperature. 

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