Publications by authors named "Hyea Eun Han"
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 Synopsis
- The study used DFT-MD simulations at 400 K to analyze the solid electrolyte interface (SEI) between a lithium (Li) anode and [Pyr][TFSI] ionic liquid.
- The diffusion rates of lithium in both the Li-electrode region and the SEI were measured, with higher diffusion constants observed in the Li-region compared to the SEI.
- The activation energies for lithium diffusion were found to vary between the smaller and larger systems, indicating different behaviors in Li-diffusion across these two regions.
Ionic liquids (ILs) are promising materials for application in a new generation of Li batteries. They can be used as electrolyte or interlayer or incorporated into other materials. ILs have the ability to form a stable solid electrochemical interface (SEI), which plays an important role in protecting the Li-based electrode from oxidation and the electrolyte from extensive decomposition.
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