AI Article Synopsis
- The use of sulfide solid electrolytes improves the stability of silicon anodes in lithium-ion batteries, addressing previous issues with interfacial stability against liquid electrolytes.
- This approach prevents continuous interfacial growth and irreversible losses of lithium, allowing for more efficient battery operation.
- The microsilicon cells demonstrated high current density, a wide temperature range, and high loadings, thanks to the favorable interaction between microsilicon and sulfide electrolytes.
Article Abstract
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.
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| http://dx.doi.org/10.1126/science.abg7217 | DOI Listing |
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