News Column

New Data from University of Wollongong Illuminate Findings in Silicon

May 16, 2014



By a News Reporter-Staff News Editor at Science Letter -- Current study results on Silicon have been published. According to news reporting out of Wollongong, Australia, by NewsRx editors, research stated, "In this work, a facile approach is reported to mass produce highly porous fibers constructed from silicon-carbon core-shell structures. The C-Si microfibers are prepared using a modified electrospinning deposition method (ESD), and subsequent calcination of the carbon shells."

Our news journalists obtained a quote from the research from the University of Wollongong, "Benefited from the step of vacuum drying, the unnecessary solvent left in the precursor will volatilize, resulting in the uniform three-dimensional hierarchical microfibers constructed from silicon-carbon core-shell architectures. The uniform covering layers of carbon formed by decomposition of polymer contribute to the improvement of conductivity and alleviation of volume change. The pores in the microfibers are helpful for the diffusion of electrolyte. When evaluated as an anode material for lithium-ion batteries, the C-Si microfibers exhibit improved reversibility and cycling performance compared with the commercial Si nanoparticles. A high capacity of 860 mAh g(-1) can be retained after 200 cycles at a current rate of 0.3 C. The rate capability of the C-Si microfibers is also improved. The special structure is believed to offer better structural stability upon prolonged cycling and to improve the conductivity of the material."

According to the news editors, the research concluded: "This simple strategy using the modified ESD method could also be applied to prepare other porous energy materials."

For more information on this research see: Mass production of three-dimensional hierarchical microfibers constructed from silicon-carbon core-shell architectures with high-performance lithium storage. Carbon, 2014;72():169-175. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

Our news journalists report that additional information may be obtained by contacting C.F. Zhang, University of Wollongong, Sch Mech Mat & Mech Engn, Wollongong, NSW 2522, Australia. Additional authors for this research include R.X. Yu, T.F. Zhou, Z.X. Chen, H.K. Liu and Z.P. Guo (see also Silicon).

Keywords for this news article include: Silicon, Wollongong, Australia and New Zealand

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Source: Science Letter