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A new strategy for achieving a high performance anode for lithium ion batteries-encapsulating germanium nanoparticles in carbon nanoboxes

Journal Article


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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 at carbon cubes (Ge at CC)), exhibits a high tap density and improved electronic conductivity. Compared to carbon-coated germanium bulks, the Ge at 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 at 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.

UOW Authors


Publication Date


  • 2016

Citation


  • Li, D., Wang, H., Liu, H. Kun. & Guo, Z. (2016). A new strategy for achieving a high performance anode for lithium ion batteries-encapsulating germanium nanoparticles in carbon nanoboxes. Advanced Energy Materials, 6 (5), 1501666-1-1501666-6.

Scopus Eid


  • 2-s2.0-84959880490

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/2773/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1771

Has Global Citation Frequency


Start Page


  • 1501666-1

End Page


  • 1501666-6

Volume


  • 6

Issue


  • 5

Place Of Publication


  • Germany

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 at carbon cubes (Ge at CC)), exhibits a high tap density and improved electronic conductivity. Compared to carbon-coated germanium bulks, the Ge at 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 at 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.

UOW Authors


Publication Date


  • 2016

Citation


  • Li, D., Wang, H., Liu, H. Kun. & Guo, Z. (2016). A new strategy for achieving a high performance anode for lithium ion batteries-encapsulating germanium nanoparticles in carbon nanoboxes. Advanced Energy Materials, 6 (5), 1501666-1-1501666-6.

Scopus Eid


  • 2-s2.0-84959880490

Ro Full-text Url


  • http://ro.uow.edu.au/context/aiimpapers/article/2773/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1771

Has Global Citation Frequency


Start Page


  • 1501666-1

End Page


  • 1501666-6

Volume


  • 6

Issue


  • 5

Place Of Publication


  • Germany