Journal
ACS APPLIED NANO MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c04476
Keywords
silicon; layer exchange; electroless etching; low temperature; rechargeable battery
Funding
- JSPS KAKENHI [21H01358]
- JSPS [18J20904]
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In this study, nanostructured Si layers were synthesized at low temperatures by combining metal-catalyzed crystal growth and etching. The lower crystallinity and finer nanostructures improved the anode characteristics of Li-ion batteries.
Nanostructured Si is touted to be an inexpensive, safe, and high-capacity anode for advanced thin-film batteries. However, the synthesis of crystalline Si generally requires high temperatures, which limits the choice of substrates. In this study, we synthesized nanostructured Si layers at low temperatures by combining metal-catalyzed crystal growth and etching. The lower crystallinity and finer nanostructures in Si improved the anode characteristics of Li-ion batteries. The capacity of the Si anode reached approximately 3200 mAh g-1 at 0.1 C and 2000 mAh g-1 at 1 C. Further, the low process temperature enabled the fabrication of a Si layer of the same quality on a flexible plastic substrate while maintaining the flexibility. This low-temperature synthesis of nanostructured Si anodes is therefore expected to pioneer the next generation of human-friendly flexible rechargeable batteries.
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