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In situ reductive construction of a silicon-based polymer/indium alloy hybrid layer for stable lithium metal anodes in sulfide solid-state batteries
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刘
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吴
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DOI：10.1007/s11426-026-3450-y.png)
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Abstract
En 中文
All-solid-state lithium-metal batteries that use sulfide electrolytes deliver high energy and improved safety, yet their practical use is impeded by poor chemical matching and mechanical failure at the sulfide/Li interface. Herein, on the lithium surface, we directly grow a thin indium-polysiloxane hybrid layer that contains in-situ-generated inorganic nanodomains (LiF, In/LiIn, LiSixOy) formed by the co-reduction of In3+ salts and polysiloxane’s fluorine/silicon-containing moieties (PFSIn-Li). Disclosed by a series of physicochemical and electrochemical characterizations, this hybrid layer, synthesized by a single-step solution-cast coating, is chemically inert to Li5.5PS4.5Cl1.5 (LPSC) and mechanically robust against dendrite penetration, which simultaneously halts parasitic reactions, blocks dendrite growth and preserves intimate interfacial contact and rapid Li-ion transport during repeated plating/stripping. Resultantly, symmetric cells using PFSIn-Li sustain an ultrahigh critical current density of 3.5 mA cm−2, while PFSIn-Li∣LPSC∣LiNi0.7Co0.1Mn0.2O2 full cells provide 129.8 mA h g−1 at the initial cycle under 0.5 C and retain 82.3% of this capacity after 300 cycles, more than double the retention of bare-Li cells (43.0%). This scalable, low-cost polysiloxane-In3+ chemistry furnishes a durable sulfide/lithium interface for next-generation, long-life, high-energy all-solid-state batteries.
Keywords:
all-solid-state lithium batteries
sulfide electrolyte
lithium metal anode
organic-inorganic hybrid layer
in-situ reaction
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