Abstract
Porous Zn1 − xMnxO (x = 0.1, 0.2, 0.44) nanosheets were prepared by a low-cost, large-scale production and simple approach, and the applications of these nanosheets as an anode material for Li-ion batteries (LIBs) were explored. Electrochemical measurements showed that the porous Zn0.8Mn0.2O nanosheets still delivered a stable reversible capacity of 210 mA h g−1 at a current rate of 120 mA g−1 up to 300 cycles. These results suggest that the facile synthetic method of producing porous Zn0.8Mn0.2O nanostructure can realize a better cycle durability with stable reversible capacity.Electronic supplementary materialThe online version of this article (doi:10.1186/s11671-015-0983-3) contains supplementary material, which is available to authorized users.
Highlights
ZnO, as 3d a transition-metal oxide, has been considered as an anode material for Li-ion batteries (LIBs) due to the following characteristics: high specific capacity (978 mA h g−1), abundance, low cost, non-toxic, produced, and chemically stable [1,2,3,4,5]
The doped Mg ions may only act as a buffer in a form of MgO to alleviate the stress caused by the volume changes during the formation of lithium–zinc alloys [13]
From the transmission electron microscopy (TEM) images (Fig. 3c–e), the porous nanosheets were clearly observed, which further confirms the formation of Zn0.8Mn0.2O porous nanostructures
Summary
ZnO, as 3d a transition-metal oxide, has been considered as an anode material for Li-ion batteries (LIBs) due to the following characteristics: high specific capacity (978 mA h g−1), abundance, low cost, non-toxic, produced, and chemically stable [1,2,3,4,5]. It often suffers the loss of capacity upon the cycling due to drastic volume changes during the formation of lithium zinc alloys [6–8].
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