Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/84522
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Type: Journal article
Title: Al and/or Ni-doped nanomanganese dioxide with anisotropic expansion and their electrochemical characterisation in primary Li-MnO2 batteries
Author: Zeng, J.
Wang, S.
Yu, J.
Cheng, H.
Tan, H.
Liu, Q.
Wu, J.
Citation: Journal of Solid State Electrochemistry, 2014; 18(6):1585-1591
Publisher: Springer
Issue Date: 2014
ISSN: 1432-8488
1433-0768
Statement of
Responsibility: 
Jian Zeng, Shengping Wang, Jingxian Yu, Hong Cheng, Haibo Tan, Qiuling Liu, Jinping Wu
Abstract: A variety of MnO2 nanorods containing one or two transition metals (M) (with M = Al and/or Ni) have been successfully synthesised via a facile hydrothermal synthesis route. The physical–chemical properties and electrochemical performance of manganese oxide were analysed by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometry (ICP-OES), Fourier transform infrared spectrometer (FT-IR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller method (BET), galvanostatic discharge and cyclic voltammetry (CV). The result indicated that α-type MnO2 was obtained, and a small quantity of Al and/or Ni were embedded into the crystal lattice of manganese oxide instead of the partial Mn ion, which resulted in anisotropic expansion of the MnO2 unit cell. The doping of Al can strengthen Mn–O bonds in the [MnO6] octahedral and increases the specific surface area of the modified material (i.e., Al–MnO2 is 119 m2 g−1). Interestingly, MnO2 electrode co-doped with equimolar Al and Ni exhibited the highest specific capacity of 169 mAh g−1 at 0.05 mA cm−2. The substantial enhancement of the electrochemical lithium storage capacity was due to the ameliorating of integrative factors, such as high specific surface area, excellent lattice parameters and lower electrical resistance, as well as short Li+ and electron transport length. In addition, a more stable host skeleton also guaranteed an endurable Li+ intercalation behaviour during the discharge process.
Keywords: Transition metal; hydrothermal synthesis; manganese dioxide; doped; anisotropic expansion
Rights: © Springer-Verlag Berlin Heidelberg 2014
RMID: 0020138754
DOI: 10.1007/s10008-013-2372-0
Appears in Collections:Chemistry and Physics publications

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