Preparation of a Binder-Free Three-Dimensional Carbon Foam/Silicon Composite as Potential Material for Lithium Ion Battery Anodes

Amit K. Roy, Mingjie Zhong, Matthias Georg Schwab, Axel Binder, Shyam S. Venkataraman, Željko Tomović

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

47 Citaten (Scopus)

Samenvatting

We report a novel three-dimensional nitrogen containing carbon foam/silicon (CFS) composite as potential material for lithium ion battery anodes. Carbon foams were prepared by direct carbonization of low cost, commercially available melamine formaldehyde (MF, Basotect) foam precursors. The carbon foams thus obtained display a three-dimensional interconnected macroporous network structure with good electrical conductivity (0.07 S/cm). Binder free CFS composites used for electrodes were prepared by immersing the as-fabricated carbon foam into silicon nanoparticles dispersed in ethanol followed by solvent evaporation and secondary pyrolysis. In order to substantiate this new approach, preliminary electrochemical testing has been done. The first results on CFS electrodes demonstrated initial capacity of 1668 mAh/g with 75% capacity retention after 30 cycles of subsequent charging and discharging. In order to further enhance the electrochemical performance, silicon nanoparticles were additionally coated with a nitrogen containing carbon layer derived from codeposited poly(acrylonitrile). These carbon coated CFS electrodes demonstrated even higher performance with an initial capacity of 2100 mAh/g with 92% capacity retention after 30 cycles of subsequent charging and discharging.

Originele taal-2Engels
Pagina's (van-tot)7343-7348
Aantal pagina's6
TijdschriftACS Applied Materials and Interfaces
Volume8
Nummer van het tijdschrift11
DOI's
StatusGepubliceerd - 30 mrt 2016
Extern gepubliceerdJa

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