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AuthorChristian Randell, Arro
AuthorMohamed, Assem Taha Ibrahim
AuthorBensalah, Nasr
Available date2022-04-24T10:58:39Z
Publication Date2022-03-31
Publication NameMaterials Today Communications
Identifierhttp://dx.doi.org/10.1016/j.mtcomm.2022.103151
CitationArro, Christian Randell, Assem Taha Ibrahim Mohamed, and Nasr Bensalah. "Impact of Ge content on the electrochemical performance of germanium oxide/germanium/reduced graphene (GeO2/Ge/r-GO) hybrid composite anodes for lithium-ion batteries." Materials Today Communications (2022): 103151.
ISSN23524928
URIhttps://www.sciencedirect.com/science/article/pii/S2352492822000290
URIhttp://hdl.handle.net/10576/30249
AbstractHybrid composites between Germanium (Ge) and carbonaceous materials have been extensively studied due to the carbonaceous’ component’s ability to mitigate the intrinsic problems pertaining to Ge-based anodes. The mitigation of reduced cycling ability and rate capability allows for the unhindered benefit of higher capacities in Ge-carbonaceous composite anodes. Here, the effect of different Ge mass loading on electrochemical performance is studied on a GeO2/Ge/r-GO composite made using controlled microwave radiation of ball-milled Ge and sonicated dispersion of graphene Oxide (GO) as a lithium battery anode. The composite anode at Ge 25% showed greatest cycling retention with 91% after 100 cycles and an average specific capacity of 300 mAh/g (1600 mAh/g Ge). At 75% Ge mass loading the anode suffered with limited cycling retention of 57.5% at the cost of greater specific capacities. The composite at 50% Ge attained advantageous characteristics of both composites with a stable cycling performance of 71.4% after 50 cycles and an average specific capacity of 400 mAh/g (1067 mAh/g Ge, all conducted at a current density of 100 mA/g). A positive linear correlation is revealed for increasing Ge mass loadings and specific capacities in Ge-carbonaceous as anode materials.
SponsorThis work was funded by a grant from the Qatar University under its Collaborative Grant number QUCG-CAS-20/21-4. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of Qatar University. We wish to acknowledge the analysis provided by the Central Laboratories Unit (CLU) and Center for Advanced Materials (CAM) at Qatar University.
Languageen
PublisherElsevier
SubjectLi ion batteries
Ge-based anodes
Graphene oxide
Hybrid composites
Alloying/De-alloying
TitleImpact of Ge content on the electrochemical performance of Germanium Oxide/Germanium/ reduced graphene (GeO2/Ge/r-GO) hybrid composite anodes for lithium-ion batteries
TypeArticle
Volume Number30
Open Access user License http://creativecommons.org/licenses/by/4.0/
dc.accessType Open Access


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