ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Unveiling Copper-Induced Phase Transitions and Degradation Mechanisms of Transition Metal Sulfide Anodes for Sodium-Ion Batteries.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Transition metal sulfides (TMSs) are promising anodes for sodium-ion batteries (SIBs) owing to their high theoretical capacity and natural abundance. However, their electrochemical performance is strongly affected by the formation of sodium polysulfides (NaPSs), which induce complex phase transformations and electrode degradation. In particular, NaPSs react with the copper (Cu) current collector, leading to the formation of Cu-incorporated sulfides, yet the underlying mechanisms remain insufficiently understood. Here, we unveil the fundamental origins of phase evolution in TMS-based anodes. We reveal that NaPSs formed during early cycling react with Cu substrates to yield NaCu
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