The development of silicon anodes for lithium-ion batteries has been largely impeded by poor interfacial stability against liquid electrolytes. Here, we enabled the stable operation of a 99.9 weight % microsilicon anode by using the interface passivating properties of sulfide solid electrolytes. Bulk and surface characterization, and quantification of interfacial components, showed that such an approach eliminates continuous interfacial growth and irreversible lithium losses. Microsilicon full cells were assembled and found to achieve high areal current density, wide operating temperature range, and high areal loadings for the different cells. The promising performance can be attributed to both the desirable interfacial property between microsilicon and sulfide electrolytes and the distinctive chemomechanical behavior of the lithium-silicon alloy.

中文翻译：

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硫化物固体电解质实现的无碳高负载硅阳极

用于锂离子电池的硅负极的发展在很大程度上受到了对液体电解质的界面稳定性差的阻碍。在这里，我们利用硫化物固体电解质的界面钝化特性，使 99.9 重量％的微硅阳极能够稳定运行。体积和表面表征以及界面成分的量化表明，这种方法消除了连续的界面生长和不可逆的锂损失。组装了微硅全电池，发现不同电池可实现高面积电流密度、宽工作温度范围和高面积负载。有希望的性能可归因于微硅和硫化物电解质之间理想的界面特性以及锂-硅合金独特的化学机械行为。