Etching technique makes silicon anodes last longer in lithium batteries
Researchers have developed a chemical process that makes silicon particles more durable in lithium-ion batteries, achieving high charging efficiency and stable performance over repeated cycles. The advance could extend battery life and reduce costs for electric vehicles and grid storage systems that rely on silicon-enhanced anodes.
Originaltitel: Porous Structuring of Si Microparticles for Li-Ion Battery Anodes by Urea-Assisted Etching
after 100 cycles at 0.1 C, with Coulombic efficiencies of 98.8-99.7%, whereas higher silicon loadings lead to rapid capacity decay. Cycling-resolved impedance and differential-capacity analyses reveal the formation of a thicker yet mechanically resilient interphase that stabilizes charge-transfer kinetics, while rate capability tests show 65-74% capacity retention at 2 C.