Unraveling Chirality-Induced Spin Selectivity Effect in Hybrid Chiral MoS ₂ for Spin-Resolved Sulfur Redox Chemistry

Lithium-sulfur batteries (LSBs) promise high energy density but face critical challenges owing to sluggish sulfur redox kinetics and uncontrolled lithium polysulfide (LiPS) shuttling. Here, we demonstrate that chiral materials directly enhance LSB performance. By intercalating chiral methylbenzylamine (MBA) molecules into MoS₂ layers, R-ChiMoS₂ is synthesized, which stabilizes the metastable 1T phase and enables spin-selective electron transport through the chirality-induced spin selectivity (CISS) effect. The modified structure exhibits expanded interlayer spacing and coexisting 1<i>T</i>/2H domains, offering abundant active sites and stronger LiPS binding. As a result, R-ChiMoS₂ accelerates sulfur reduction and oxidation reactions, lowers the Li₂S nucleation barrier, and improves Li⁺ diffusion compared with bulk 2H or racemic counterparts. Incorporation of R-ChiMoS₂@carbon nanotubes (CNTs) into separators further enhances conductivity and ensures durable LiPS blocking. Consequently, the resulting LSBs deliver high reversible capacity, outstanding rate capability up to 5.0 C, and long-term cycling stability under high sulfur-loading conditions. This study highlights chirality engineering as an effective design strategy for regulating spin-selective charge transport and advancing electrochemical energy storage performance.