Synthesis and characterization of α-MoO{sub 3} nanobelt composite positive electrode materials for lithium battery application

Journal Article · Mon Jun 15 04:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.02.036· OSTI ID:22475797

Nadimicherla, Reddeppa ^[1]; Chen, Wen ^[2]; Guo, Xin ^[1]

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1. Laboratory of Solid State Ionics, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)
2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070 (China)

Graphical abstract: (a) TEM image of MoO{sub 3}/PEO nanobelts composite, (b) CV curves of MoO{sub 3}/PEO nanobelts composite. - Highlights: • α-MoO{sub 3} and PEO surfactant MoO{sub 3} nanobelts were synthesized by solvothermal method. • The capacity retention of 12.5 wt% PEO surfactant MoO{sub 3} nanobelts is 88.78%. • The specific capacity of 12.5 wt% PEO surfactant MoO{sub 3} nanobelts is 352 mAh g{sup −1}. • MoO{sub 3}/PEO nanobelts composite material demonstrates good cycling stability as cathode. - Abstract: α-MoO{sub 3} and PEO surfactant MoO{sub 3} nanobelts were synthesized by a solvothermal method. The morphology and nanostructure of samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Bare α-MoO{sub 3} and 12.5 wt% PEO surfactant MoO{sub 3} nanobelts have an initial specific capacities of 279 and 352 mAh g{sup −1}, respectively, at constant current density 30 mA g{sup −1} with potential range of 1.5–4.0 V vs. Li/Li{sup +}. While MoO{sub 3} is modified by the intercalation of PEO, it is effectively shielded against electrostatic interaction between the MoO{sub 3} interlayer and Li{sup +} ions. We reported positive material, a nanocomposite of MoO{sub 3} coated with polyethylene oxide. It presents good cycling stability due to existence of the conductive and protective polyethylene oxide coating and the nanobelt morphology of MoO{sub 3}. The polyethylene oxide acts as a conducting matrix, a binder and an active material, as well as a volume change buffer agent, which holds the MoO{sub 3} particles in place during the discharge cycles. The cyclic voltammograms of the 12.5 wt% PEO surfactant MoO{sub 3} nanobelt composite displayed better cyclic performance compared with pure MoO{sub 3} nanobelts. The specific capacity of the pure MoO{sub 3} nanobelts and 12.5 wt% PEO surfactant MoO{sub 3} nanobelts exhibit as 199 mAh g{sup −1} and 225 mAh g{sup −1}, respectively, after 9 cycles, suggesting that the stability of surfactant material is worthy.

• OSTI ID: 22475797
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 66; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CAPACITY
CATHODES
COMPOSITE MATERIALS
CURRENT DENSITY
ELECTROCHEMISTRY
ENERGY STORAGE
FOURIER TRANSFORM SPECTROMETERS
INFRARED SPECTRA
INTERACTIONS
LITHIUM IONS
MOLYBDENUM OXIDES
NANOCOMPOSITES
NANOSTRUCTURES
PERFORMANCE
POLYETHYLENE GLYCOLS
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SURFACTANTS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION