Aluminium (Al)-doped ZnO nanoparticles (NPs) have been synthesised by a simple solvothermal method at low temperature. The electrochemical properties of the obtained products as anode for lithium ion batteries were examined through galvanostatic discharge–charge, cyclic voltammetry and electrochemical impedance spectroscopy measurements. The results show that the reversible capacities of Al-doped ZnO NPs are higher than the capacities of pure ZnO synthesised under the same experimental conditions. ZnO NPs doped with 2% (molar ratio) of Al show the best electrochemical properties with reversible specific capacities of 418 mA·h·g⁻¹ at a current density of 50 mA·g⁻¹. The enhanced electrochemical performance of this material could be attributed to the improved electronic conductivity because of the doping of Al³⁺ at an appropriate concentration.

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Effect of aluminium doping amount on the electrochemical properties of ZnO nanoparticles as anode for lithium ion batteries

References

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