CTAB-assisted growth of self-supported Zn2GeO4 nanosheet network on a conductive foam as a binder-free electrode for long-life lithium-ion batteries

This data was imported from PubMed:

Authors: Gao, G., Abdelkader, A. et al.

http://eprints.bournemouth.ac.uk/30063/

Journal: Nanoscale

Volume: 10

Issue: 3

Pages: 921-929

eISSN: 2040-3372

DOI: 10.1039/c7nr05407f

The Ge-based compounds show great potential as replacements for traditional graphite anode in lithium-ion batteries (LIBs). However, large volume changes and low conductivity of such materials result in a poor electrochemical cycling and rate performance. Herein, we fabricate a self-supported and three-dimensional (3D) sponge-like structure of interlinked Zn2GeO4 ultrathin nanosheets anchored vertically on a nickel foam (ZGO NSs@NF) via a simple hydrothermal process assisted by cetyltrimethyl ammonium bromide (CTAB). Such robust self-supported hybrid structures greatly improve the structural tolerance of the active materials and accommodate the volume variation that occurs during repeated electrochemical cycling. As expected, the self-supported ZGO NSs@NF composites demonstrate an excellent lithium storage with a high discharge capacity, a long cycling life, and a good rate capability when used as binder-free anodes for LIBs. A high reversible discharge capacity of 794 mA h g-1 is maintained after 500 cycles at 200 mA g-1, corresponding to 81% capacity retention of the second cycle. Further evaluation at a higher current density (2 A g-1) also delivers a reversible discharge capacity (537 mA h g-1) for this binder-free anode. This novel 3D structure of the self-supported ultrathin nanosheets on a conductive substrate, with its volume buffer effect and good interfacial contacts, can stimulate the progress of other energy-efficient technologies.

This data was imported from Scopus:

Authors: Gao, G., Abdelkader, A. et al.

http://eprints.bournemouth.ac.uk/30063/

Journal: Nanoscale

Volume: 10

Issue: 3

Pages: 921-929

eISSN: 2040-3372

ISSN: 2040-3364

DOI: 10.1039/c7nr05407f

© 2018 The Royal Society of Chemistry. The Ge-based compounds show great potential as replacements for traditional graphite anode in lithium-ion batteries (LIBs). However, large volume changes and low conductivity of such materials result in a poor electrochemical cycling and rate performance. Herein, we fabricate a self-supported a nd three-dimensional (3D) sponge-like structure of interlinked Zn 2 GeO 4 ultrathin nanosheets anchored vertically on a nickel foam (ZGO NSs@NF) via a simple hydrothermal process assisted by cetyltrimethyl ammonium bromide (CTAB). Such robust self-supported hybrid structures greatly improve the structural tolerance of the active materials and accommodate the volume variation that occurs during repeated electrochemical cycling. As expected, the self-supported ZGO NSs@NF composites demonstrate an excellent lithium storage with a high discharge capacity, a long cycling life, and a good rate capability when used as binder-free anodes for LIBs. A high reversible discharge capacity of 794 mA h g -1 is maintained after 500 cycles at 200 mA g -1 , corresponding to 81% capacity retention of the second cycle. Further evaluation at a higher current density (2 A g -1 ) also delivers a reversible discharge capacity (537 mA h g -1 ) for this binder-free anode. This novel 3D structure of the self-supported ultrathin nanosheets on a conductive substrate, with its volume buffer effect and good interfacial contacts, can stimulate the progress of other energy-efficient technologies.

This source preferred by Amor Abdelkader

This data was imported from Web of Science (Lite):

Authors: Gao, G., Abdelkader, A. et al.

http://eprints.bournemouth.ac.uk/30063/

Journal: NANOSCALE

Volume: 10

Issue: 3

Pages: 921-929

eISSN: 2040-3372

ISSN: 2040-3364

DOI: 10.1039/c7nr05407f

The data on this page was last updated at 04:51 on April 23, 2018.