Microwave-assisted synthesis of flower-like structure ϵ-MnO2 as cathode for lithium ion batteries

Authors

Dan Li, University of WollongongFollow
Guodong Du, University of WollongongFollow
Jieqiang Wang, University of WollongongFollow
Zaiping Guo, University of WollongongFollow
Zhixin Chen, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow

RIS ID

68831

Publication Details

Li, D., Du, G., Wang, J., Guo, Z., Chen, Z. & Liu, H. (2012). Microwave-assisted synthesis of flower-like structure ε-MnO2 as cathode for lithium ion batteries. Journal of the Chinese Chemical Society, 59 (10), 1211-1215.

Abstract

Nanostructured flower-like ϵ-MnO₂ and α-MnO₂ nanowires were prepared by the microwave-assisted hydrothermal method at 110 °C and 140 °C. The ϵ-nanoflowers are about 500 nm in size and are composed of petals about 100 nm in length, while the α-nanowires are 20-30 μm in diameter and about 1 mm in length. The ϵ-MnO₂ demonstrates higher initial discharge capacity, while the α-MnO₂ shows greater cycling stability in different voltage ranges. Both phases of MnO₂ show better cycling performance in ethylene carbonate (EC)/diethyl carbonate electrolyte (DEC) than in EC/dimethyl carbonate (DMC) electrolyte. The ϵ-MnO₂ sample delivered a discharge capacity of 116.2 mAh g⁻¹ for up to 100 cycles, indicating that it is a promising cathode material for lithium ion batteries.