학술논문
Exfoliation and Reassembly Routes to a Ge/RuO 2 Nanocomposite as an Anode for Advanced Lithium-Ion Batteries.
Document Type
Article
Source
Subject
*LITHIUM-ion batteries
*TRANSMISSION electron microscopy
*X-ray absorption
*X-ray spectroscopy
*RUTHENIUM oxides
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Language
ISSN
1661-6596
Abstract
Ge/RuO2 nanocomposites were successfully fabricated as anode materials for lithium-ion batteries using RuO2 nanosheets and Ge/GeO2 nanoparticles (NPs). X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) analyses showed that elemental Ge nanoparticles were distributed onto the rutile-type RuO2. Transmission electron microscopy images showed well-dispersed Ge nanoparticles embedded in rutile-type RuO2. The Ge/RuO2 nanocomposite maintained higher discharge capacities (471 mA h g−1) after the 90th cycle at 0.1 A g−1 than that (211 mA h g−1) of Ge/GeO2 nanoparticles. The Ge/RuO2 nanocomposite exhibited a higher capacity retention than Ge/GeO2 NPs. These results suggest that the well-dispersed Ge nanoparticles within RuO2 matrices enhance the cycle stability and capacity retention of the anode material. [ABSTRACT FROM AUTHOR]