Details

Autor(en) / Beteiligte

• Ghannam, M. M.
• Heiba, Zein K.
• Sanad, M. M. S.
• Mohamed, Mohamed Bakr

Titel

Functional properties of ZnMn2O4/MWCNT/graphene nanocomposite as anode material for Li-ion batteries

Ist Teil von

• Applied physics. A, Materials science & processing, 2020, Vol.126 (5), Article 332

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nano-ZnMn 2 O 4 and ZnMn 2 O 4 /MWCNT/graphene composites were prepared by solgel and ball-milling methods. The functional properties of the prepared samples were studied by applying various techniques. X-ray diffraction (XRD) Rietveld analysis indicated a single-phase ZnMn 2 O 4 with a partially inverse spinel nanostructure (average size ≈ 7 nm), confirmed by TEM graphs, which revealed the morphology and particle nanosize distribution in samples. The samples were further characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy (XPS). The Gaussian fitting of Zn 2p and Mn 2p narrow XPS spectrum confirmed the cation distribution obtained from XRD Rietveld analysis. The galvanostatic cycling of the pure ZnMn 2 O 4 electrode exhibited higher initial discharge capacity (~ 1978 mAh g −1 ) when cycled at 100 mA g −1 versus Li/Li + . Meanwhile, the cyclic voltammetry tests evidenced the enhanced Li-ion diffusion during the oxidation and reduction processes. The assembled ZnMn 2 O 4 /MWCNT/G cell delivered about 190 mAh g −1 of specific discharge capacity over 100 cycles with 65% capacity retention.