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Stable silicon anodes for lithium-ion batteries using mesoporous metallurgical silicon

: Li, X.P.; Yan, C.L.; Wang, J.N.; Graff, A.; Schweizer, S.L.; Sprafke, A.; Schmidt, O.G.; Wehrspohn, R.B.


Advanced energy materials 5 (2015), Nr. 4, Art. 1401556
ISSN: 1614-6840
ISSN: 1614-6832
Fraunhofer IWM ( IMWS) ()

Extremely cheap mesoporous silicon nanowires by metal-assisted chemical etching of inexpensive metallurgical silicon have a higher porosity and thus volume expansion possibility than simple silicon nanowires. Metallurgical Si nanowires (MG-SiNWs) show a reversible capacity of about 2111 mAh g−1 at a current rate of 0.2 C, an encouraging stability of over at least 50 cycles, and a good rate capability.