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https://hdl.handle.net/2440/129975
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Type: | Journal article |
Title: | A new strategy for achieving a high performance anode for lithium ion batteries - encapsulating germanium nanoparticles in carbon nanoboxes |
Author: | Li, D. Wang, H. Liu, H.K. Guo, Z. |
Citation: | Advanced Energy Materials, 2016; 6(5):1501666-1-1501666-6 |
Publisher: | Wiley |
Issue Date: | 2016 |
ISSN: | 1614-6832 1614-6840 |
Statement of Responsibility: | Dan Li, Hongqiang Wang, Hua Kun Liu, and Zaiping Guo |
Abstract: | A novel strategy to improve the electrochemical performance of a germanium anode is proposed via encapsulating germanium nanoparticles in carbon nanoboxes by carbon coating the precursor, germanium dioxide cubes, and then subjecting them to a reduction treatment. The complete and robust carbon boxes are shown to not only provide extra void space for the expansion of germanium nanoparticles after lithium insertion but also offer a large reactive area and reduced distance for the lithium diffusion. Furthermore, the thus‐obtained composite, composed of densely stacked carbon nanoboxes encapsulating germanium nanoparticles (germanium@carbon cubes (Ge@CC)), exhibits a high tap density and improved electronic conductivity. Compared to carbon‐coated germanium bulks, the Ge@CC material shows excellent electrochemical properties in terms of both rate capability and cycling stability, due to the unique cubic core–shell structure and the effective carbon coating, so that the Ge@CC electrode delivers ≈497 mA h g−¹ at a current rate of 30 C and shows excellent cycling stability of 1065.2 mA h g−¹ at 0.5 C for over 500 cycles. |
Description: | Published online: December 15, 2015 |
Rights: | © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/aenm.201501666 |
Published version: | http://dx.doi.org/10.1002/aenm.201501666 |
Appears in Collections: | Aurora harvest 4 Chemical Engineering publications |
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