• Adam, V.
• Wegener, S. A.
• Zakharova, G. S.
• Puzyrev, I. S.
• Podvalnaya, N. V.
• Andreikov, E. I.
• Kiselkov, D. M.
• Nölke, Jan-Hinrich
• Zhu, Q.
• Zharnikov, M.
• Ottmann, A.
• Asyuda, A.
• Singer, L.
• Klingeler, R.
• Thauer, Elisa

Abstract

<jats:title>Abstract</jats:title><jats:p>For the first time, ZnO/C composites were synthesized using zinc glycerolate as a precursor through one-step calcination under a nitrogen atmosphere. The effect of the heat treatment conditions on the structure, composition, morphology as well as on the electrochemical properties regarding application in lithium-ion batteries are investigated. The products obtained by calcination of the precursor in nitrogen at 400—800 °C consist of zinc oxide nanoparticles and amorphous carbon that is <jats:italic>in-situ</jats:italic> generated from organic components of the glycerolate precursor. When used as anode material for lithium-ion batteries, the as-prepared ZnO/C composite synthesized at a calcination temperature of 700 °C delivers initial discharge and charge capacities of 1061 and 671 mAh g<jats:sup>−1</jats:sup> at a current rate of 100 mA g<jats:sup>−1</jats:sup> and hence 1.5 times more than bare ZnO, which reaches only 749/439 mAh g<jats:sup>−1</jats:sup>. The native carbon improves the conductivity, allowing efficient electronic conductivity and Li-ion diffusion. By means of <jats:italic>ex-situ</jats:italic> XRD studies a two-step storage mechanism is proven.</jats:p>

Topics

• nanoparticle
• impedance spectroscopy
• amorphous
• Carbon
• x-ray diffraction
• zinc
• Nitrogen
• composite
• Lithium