NDLI: Microwave-Assisted Synthesis of $Ge/GeO_{2}$-Reduced Graphene Oxide Nanocomposite with Enhanced Discharge Capacity for Lithium-Ion Batteries

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Microwave-Assisted Synthesis of $Ge/GeO_{2}$-Reduced Graphene Oxide Nanocomposite with Enhanced Discharge Capacity for Lithium-Ion Batteries

Content Provider	MDPI
Author	Koo, Ji-Hye Paek, Seung-Min
Copyright Year	2021
Description	Germanium/germanium oxide nanoparticles with theoretically high discharge capacities of 1624 and 2152 mAh/g have attracted significant research interest for their potential application as anode materials in Li-ion batteries. However, these materials exhibit poor long-term performance due to the large volume change of 370% during charge/discharge cycles. In the present study, to overcome this shortcoming, a Ge/GeO2/graphene composite material was synthesized. Ge/GeO2 nanoparticles were trapped between matrices of graphene nanosheets to offset the volume expansion effect. Transmission electron microscopy images revealed that the Ge/GeO2 nanoparticles were distributed on the graphene nanosheets. Discharge/charge experiments were performed to evaluate the Li storage properties of the samples. The discharge capacity of the bare Ge/GeO2 nanoparticles in the first discharge cycle was considerably large; however, the value decreased rapidly with successive cycles. Conversely, the present Ge/GeO2/graphene composite exhibited superior cycling stability.
Starting Page	319
e-ISSN	20794991
DOI	10.3390/nano11020319
Journal	Nanomaterials
Issue Number	2
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-01-27
Access Restriction	Open
Subject Keyword	Nanomaterials Electrochemistry Germanium Oxide Graphene Composite Anode Material Lithium-ion Battery
Content Type	Text
Resource Type	Article

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