Chemically anchored two-dimensional-SiOx/zero-dimensional-MoO2 nanocomposites for high-capacity lithium storage materials
- Authors
- Kim, Soohwan; Yoo, Hyundong; Kim, Hansu
- Issue Date
- Jun-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.10, no.36, pp.21375 - 21381
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 10
- Number
- 36
- Start Page
- 21375
- End Page
- 21381
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2049
- DOI
- 10.1039/d0ra02462g
- ISSN
- 2046-2069
- Abstract
- Silicon oxides are promising alternatives for graphite anodes in lithium-ion batteries. SiOx nanosheets exhibit favorable anodic performances, including outstanding capacity retention and dimensional stability, due to their unique two-dimensional (2D) microstructures, but suffer from low specific capacity and poor initial coulombic efficiency. Here we demonstrate that chemically anchoring of molybdenum dioxide (MoO2) nanoparticles on the surface of 2D-SiOx nanosheets via a Mo–O–Si bond boosts both the reversible capacity and initial coloumbic efficiency without sacrificing the useful properties of 2D-SiOx nanosheets. The enhancements can be attributed to the introduction of a zero-dimensional MoO2 nano-object, which offers abnormal storage sites for lithium. The proposed nano-architecturing shows how we can maximize the advantages of 2D nanomaterials for energy storage applications.
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