Abstract
The aim of this work is to introduce a high performance cathode for magnesium-ion batteries. TiO2/reduced graphene oxide (rGO) composites were mixed in ball mill. The samples are charac- terized using XRD and SEM. The spex-milled composites exhibit better electrochemical perfor- mance with higher reversible capacity and excellent cyclability. The excellent electrochemical performance of TiO2/rGO composites is due to their unique structures, which intimately combine the conductive graphene nanosheets network with TiO2 nanoparticles and possess the characteristic parallel channels running along the [010] orientation, which allow easy Mg2+ transport. It was found that layered TiO2 and rGO nanosheets in the composite interlace with each other to form novel sandwich-structured microspheres, which exhibit preferable electrochemical performance in rechargeable Mg batteries.
Highlights
The lithium (Li) battery used as a power source because of its high specific power and high energy density
It was observed that the (0.6TiO2/0.4rGO) composite basically retains the position of the diffraction peaks of TiO2 but the intensity decreases in 0.6TiO2/0.4rGO composite. This indicated that the incorporation of rGO considerably restrains the stacking of TiO2 layers. It can be hardly detected the (002) diffraction peaks of the rGO at 2θ = 24.4 ̊ in the XRD patterns of the composite, which indicates that the rGO seldom stack during the ball mill process [11]
From the above findings it can be concluded that: 0.6TiO2/0.4rGO composites were synthesized by a ball mill method
Summary
The lithium (Li) battery used as a power source because of its high specific power and high energy density. High demand for Li battery tends to make increase in Li price due to geographically limitedness in the earth crust [1]. As an alternative to lithium, magnesium has been foregrounded. Magnesium batteries have recently attracted great interest due to their high energy density and environmentally friendly components, coupled with magnesium’s low cost (∼$2700/ton for Mg compared to $64,000/ton for Li) and abundance in the earth’s crust (∼13.9% Mg compared to ∼0.0007% of Li) [1]-[4]. How to cite this paper: Sheha, E. (2014) Studies on TiO2/Reduced Graphene Oxide Composites as Cathode Materials for Magnesium-Ion Battery.
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