Optimized internal standard selection improves trace impurity quantification in lithium sulfide, indicating better control in solid-state battery applications.
Lithium sulfide (Li 2 S) is a critical precursor for sulfide-based solid electrolytes in next-generation all-solid-state batteries; accordingly, rigorous control and accurate quantification of trace-level impurities are essential.
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Lee et al. (2026) studied this question.
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