Abstract
High-capacity thin-film germanium was coupled with free-standing single-wall carbon nanotube (SWCNT) current collectors as a novel lithium ion battery anode. A series of Ge-SWCNT compositions were fabricated and characterized by scanning electron microscopy and Raman spectroscopy. The lithium ion storage capacities of the anodes were measured to be proportional to the Ge weight loading, with a 40 wt% Ge-SWCNT electrode measuring 800 mAh/g. Full batteries comprising a Ge-SWCNT anode in concert with a LiCoO2 cathode have demonstrated a nominal voltage of 3.35 V and anode energy densities 3× the conventional graphite-based value. The higher observed energy density for Ge-SWCNT anodes has been used to calculate the relative improvement in full battery performance when capacity matched with conventional cathodes (e.g., LiCoO2, LiNiCoAlO2, and LiFePO4). The results show a >50% increase in both specific and volumetric energy densities, with values approaching 275 Wh/kg and 700 Wh/L.
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References
M. Endo, C. Kim, K. Nishimura, T. Fujino, K. Miyashita: Recent development of carbon materials for Li ion batteries. Carbon38183 (2000)
B. Kennedy, D. Patterson, S. Cammilleri: Use of lithium-ion batteries in electric vehicles. J. Power Sources90156 (2000)
K. Takei, K. Ishihara, K. Kumai, T. Iwahori, K. Miyake, T. Nakatsu, N. Terada, N. Arai: Performance of large-scale secondary lithium batteries for electric vehicles and home-use load-leveling systems. J. Power Sources119-121887 (2003)
S. Tominaka, S. Ohta, H. Obata, T. Momma, T. Osaka: On-chip fuel cell: Micro direct methanol fuel cell of air-breathing, membraneless, and monolithic design. J. Am. Chem. Soc.13010456 (2008)
B. Laforge, L. Levan-Jodin, R. Salot, A. Billard: Study of germanium as electrode in thin-film battery. J. Electrochem. Soc.155, (2) A181 (2008)
S.D. Beattie, D. Larcher, M. Morcrette, B. Simon, J-M. Tarascon: Si electrodes for Li-ion batteries—A new way to look at an old problem. J. Electrochem. Soc.155, (2) A158 (2008)
T. Moon, C. Kim, B. Park: Electrochemical performance of amorphous-silicon thin films for lithium rechargable batteries. J. Power Sources155391 (2006)
S. Yoon, C-M. Park, H-J. Sohn: Electrochemical characterizations of germanium and carbon-coated germanium composite anode for lithium-ion batteries. Electrochem. Solid-State Lett.11, (4) A42 (2008)
C.K. Chan, X.F. Zhang, Y. Cui: High capacity Li ion battery anodes using Ge nanowires. Nano Lett.8307 (2008)
L-F. Cui, Y. Yang, C-M. Hsu, Y. Cui: Carbon-silicon core-shell nanowires as high capacity electrode for lithium ion batteries. Nano Lett.9, (9) 3370 (2009)
B.J. Landi, M.J. Ganter, C.D. Cress, R.A. DiLeo, R.P. Raffaelle: Carbon nanotubes for lithium ion batteries. Energy Environ. Sci.2638 (2009)
J. Graetz, C.C. Ahn, R. Yazami, B. Fultz: Nanocrystalline and thin film germanium electrodes with high lithium capacity and high rate capabilities. J. Electrochem. Soc.151A698 (2004)
B.J. Landi, H.J. Ruf, C.M. Evans, C.D. Cress, R.P. Raffaelle: Purity assessment of single-wall carbon nanotubes, using optical absorption spectroscopy. J. Phys. Chem. B1099952 (2005)
P. Caldelas, A.G. Rolo, M.J.M. Gomes, E. Alves, A.R. Ramos, O. Conde, S. Yerci, R. Turan: Raman and XRD studies of Ge nanocrystals in alumina films grown by RF-magnetron sputtering. Vacuum821466 (2008)
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DiLeo, R.A., Ganter, M.J., Raffaelle, R.P. et al. Germanium-single-wall carbon nanotube anodes for lithium ion batteries. Journal of Materials Research 25, 1441–1446 (2010). https://doi.org/10.1557/JMR.2010.0184
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DOI: https://doi.org/10.1557/JMR.2010.0184