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The nanostructure of the Si–Al eutectic and its use in lithium batteries

  • Wenchao Zhou (a1), Tianchan Jiang (a2), Hui Zhou (a1), Yuxuan Wang (a1), Jiye Fang (a3) and M. Stanley Whittingham (a3)...

Aluminum–silicon alloys are an important class of commercial casting materials having wide applications in automotive and aerospace industries. Etching the Al–Si eutectic leads to selective dissolution of Al, resulting in novel morphology – macroporous Si spheres with a three-dimensional nano network. Up to 5% Al is dissolved in Si, leading to an expansion of the crystal lattice. The resulting porous Si is electrochemically active with lithium and thus can be used as a high capacity anode for lithium-ion batteries. The etching of Al–Si provides a simple and low-cost method of producing nano-structured Si materials.

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Address all correspondence to M. Stanley Whittingham
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1Whittingham M.S.: History, evolution and future status of energy storage. Proc. IEEE 100, 15181534 (2012).
2Kasavajjula U., Wang C., and Appleby A.J.: Nano- and bulk-silicon-based insertion anodes for lithium-ion secondary cells. J. Power Sources 163, 1003 (2007).
3Zhou W., Upreti S., and Whittingham M.S.: Electrochemical performance of Al-Si-Graphite composite as anode for lithium-ion batteries. Electrochem. Commun. 13, 158161 (2011).
4Yu Y., Gu L., Zhu C., Tsukimoto S., Aken P.A., and Maier J.: Reversible storage of lithium in silver-coated three-dimensional macroporous silicon. Adv. Mater. 22, 22472250 (2010).
5Jia H., Gao P., Yang J., Wang J., Nuli Y., and Yang Z.: Novel three-dimensional mesoporous silicon for high power lithium-ion battery anode material. Adv. Energy Mater. 1, 10361039 (2011).
6Li H., Huang X., Chen L., Wu Z., and Liang Y.: A high capacity nano – Si composite anode material for lithium rechargeable batteries. Electrochem. Solid-State Lett. 2, 547549 (1999).
7Yao Y., McDowell M.T., Ryu I., Wu H., Liu N., Hu L., Nix W.D., and Cui Y.: Interconnected silicon hollow nanospheres for lithium-ion battery anodes with long cycle life. Nano Lett. 11, 29492954 (2011).
8Murray J. and McAlister A.: The Al-Si (Aluminum-Silicon) system. J. Phase Equilib. 5, 7484 (1984).
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MRS Communications
  • ISSN: 2159-6859
  • EISSN: 2159-6867
  • URL: /core/journals/mrs-communications
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Supplementary Materials

Whittingham Supplementary Material

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