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To maximize the anodic charge storage capacity of Li-ion and Na-ion batteries (LIBs and SIBs, respectively), the conversion–alloying-type Sb 2 S 3  anode has attracted considerable interest because of its merits of a high theoretical capacity of 946 mAh g −1  and a suitable anodic lithiation/delithiation voltage window of 0.1–2 V  vs . Li + /Li. Recent advances in nanostructuring of the Sb 2 S 3  anode provide an effective way of mitigating the challenges of structure conversion and volume expansion upon lithiation/sodiation that severely hinder the Sb 2 S 3  cycling stability. In this context, we report uniformly sized colloidal Sb 2 S 3  nanoparticles (NPs) as a model Sb 2 S 3  anode material for LIBs and SIBs to investigate the effect of the primary particle size on the electrochemical performance of the Sb 2 S 3  anode. We found that compared with microcrystalline Sb 2 S 3 , smaller  ca . 20–25 nm and  ca . 180–200 nm Sb 2 S 3  NPs exhibit enhanced cycling stability as anode materials in both rechargeable LIBs and SIBs. Importantly, for the  ca . 20–25 nm Sb 2 S 3  NPs, a high initial Li-ion storage capacity of 742 mAh g −1  was achieved at a current density of 2.4 A g −1 . At least 55% of this capacity was retained after 1200 cycles, which is among the most stable performance Sb 2 S 3  anodes for LIBs.

Colloidal Antimony Sulfide Nanoparticles as a High-Performance Anode Material for Li-ion and Na-ion Batteries