About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Partially Prelithiated Silicon Anodes as an Efficient Route to Suppress Lithium Dendrite Growth for Durable All-Solid-State Li-S Batteries |
| Author(s) |
Woojin Kang, Yuhong Jeong, Hyung-Tae Lim |
| On-Site Speaker (Planned) |
Woojin Kang |
| Abstract Scope |
All-solid-state batteries (ASSBs) with lithium metal or silicon anodes are promising for high energy density, but suffer from interfacial instability caused by dendrite growth and severe silicon volume expansion. Pre-lithiation is an effective strategy to address these issues. In our previous work, a Li3.25Si anode exhibited voltage noise when overcharged to 3.7 V, suggesting instability at high lithium content. Here, we fabricated a partially pre-lithiated anode consisting of Li3.75Si and residual Si0.155. The residual silicon underwent further alloying during cycling, suppressing volume expansion and voltage noise while improving capacity retention. Full cells were assembled using an argyrodite solid electrolyte and sulfur composite cathode. Electrochemical behavior was evaluated by voltage profiling and EIS in two- and three-electrode configurations. XRD, XPS, and TOF-SIMS were used to analyze phase evolution and Li-ion distribution. This work demonstrates that partially pre-lithiated Si anodes suppress dendrite growth and enhance durability in high-lithium all-solid-state Li–S batteries. |