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Title: Germanium nanowires-based carbon composite as anodes for lithium-ion batteries
Authors: Yan, Qingyu
Tan, Li Ping
Lu, Ziyang
Tan, Huiteng
Zhu, Jixin
Rui, Xianhong
Hng, Huey Hoon
Issue Date: 2012
Source: Tan, L. P., Lu, Z., Tan, H. T., Zhu, J., Rui, X., Yan, Q., & Hng, H. H. (2012). Germanium nanowires-based carbon composite as anodes for lithium-ion batteries. Journal of Power Sources, 206, 253-258.
Series/Report no.: Journal of power sources
Abstract: Lithium-ion batteries have been actively researched in recent years due to it being one of the most promising energy storage systems. Herein, we report a novel approach where germanium nanowires (Ge NW) are grown in gold-seeded porous carbon via the solution–liquid–solid mechanism, and the corresponding improvement observed in terms of the specific capacity of this porous carbon–germanium nanowires (PC–Ge NW) composite anode. At a current density of 160 mAg−1 and voltage window of 0.001–1.5 V, a specific capacity of 789 mAhg−1 during the 50th cycle for PC–Ge NW is achieved as compared to 624 mAhg−1 during the 50th cycle for pure Ge NW. Even though the content of the Ge is only 53.5 weight percent in the PC–Ge NW composite, it yields a better stability and higher specific capacity, indicating a synergistic effect between porous carbon and Ge nanowires. There is also potential cost savings since the use of a lower amount of Ge can bring about good cycling properties.
ISSN: 0378-7753
DOI: 10.1016/j.jpowsour.2011.12.064
Rights: © 2012 Elsevier B.V.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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