Facile synthesis of α-MnO2 nanorods for high-performance alkaline batteries

Tang, Nian; Xia, Tian; Yang, Chao; Pi, Zhenbang; Han, Qiang

doi:10.1016/j.jpcs.2009.11.016

Cited by 85 publications

(40 citation statements)

References 24 publications

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“…An explanation for this effect can be found in publications on different manganese oxide catalysts for ORR in aqueous media [30,33,34]. It was proposed that O 2 is associatively adsorbed on the MnO x catalysts and subsequently reduced accompanied by a simultaneous oxidation of Mn 3+ ions: (11) This mechanism is also proposed here for a-Mn 2 O 3 in aprotic media. However, Lima et al [30] found the electron transfer (Eq.…”

Section: Resultssupporting

confidence: 59%

“…Manganese, for example, exists in the different valence states of Mn II , Mn III and Mn IV , corresponding to stable manganese oxides ranging from MnO, Mn 3 O 4 to Mn 2 O 3 and MnO 2 [10]. Nanostructured manganese oxides, such as mesoporous crystals, nanoparticles, nanodiscs and nanorods have been widely synthesized [11][12][13][14][15], which are investigated as ORR/OER catalysts mostly in aqueous systems for applications in metal/air batteries. Here, the focus currently lies on the various morphologies of MnO 2 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanistic study on the activity of manganese oxide catalysts for oxygen reduction reaction in an aprotic electrolyte

Augustin

Yezerska

Fenske

et al. 2015

Electrochimica Acta

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Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Mechanistic study on the activity of manganese oxide catalysts for oxygen reduction reaction in an aprotic electrolyte

Augustin

Yezerska

Fenske

et al. 2015

Electrochimica Acta

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“…In Fig. 2 (MnO x ), the Mn-O bending vibration band of [MnO 6 ] octahedral appears at 583 cm -1 [38,39]. The broad band centers at 3301 cm -1 are OH -of the chemically bonded water.…”

Section: Resultsmentioning

confidence: 96%

A three-dimensional nanostructured PANI/MnO x porous microsphere and its capacitive performance

et al. 2012

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Three-dimensional nanostructured polyaniline (PANI) and manganese oxide (MnO x ) composite porous microspheres were prepared by oxidizing aniline with KMnO 4 under interfacial chemical synthesis with 4-aminothiophenol (4-ATP) as the structure-directing agent on the Au substrate. Surface morphology and chemical composition of PANI/MnO x microsphere were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, thermo gravimetric-differential thermal analysis, and Fourier transform infrared spectrum. The result displayed that concentration of KMnO 4 played a key role in forming the 3D nanostructured porous microspheres. To obtain the regular shapes and uniform sizes of the porous microspheres, the optimal concentration of oxidant was 0.15 mol L -1 . The electrochemistry performances of PANI/MnO x microsphere were determined by cyclic voltammograms, electrochemical impedance spectroscopy, and galvanostatic charge-discharge. The specific capacitance of the 3D nanostructured PANI-MnO x porous microspheres exhibited a maximum value of 828 F g -1 at current density of 2 mA cm -2 over a potential range of 0.0-0.9 V versus SCE. It has improved 365 and 88 % comparing with that of PANI (178 F g -1 ) and MnO x (440 F g -1 ) obtained at the similar condition. The chargedischarge tests showed the PANI/MnO x microsphere possessed a good cycling stability. It maintained about 84.2 % of the initial capacitance after 1000 cycles at a current density of 2.0 mA cm -2 .

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“…Moreover, the number of granular Mn 3 O 4 was significantly decreased. Based on Ostwald ripening process principle [17,18], it is known that a large amount of manganese oxide was produced in the early calcinations. And these molecular gather to form crystal nucleus when they reach the critical state.…”

Section: Fesem Analysismentioning

confidence: 99%

Preparation and electrochemical properties of CPAC/Mn3O4 nanocomposite electrode

Luo

Zhang

Peng³

2012

J Mater Sci: Mater Electron

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Novel nanocomposite electrode, coke powder activated carbon/Mn 3 O 4 (CPAC/Mn 3 O 4 ), was prepared by Sol-Gel method using CPAC/Mn(OH) 2 as a precursor. The CPAC/Mn 3 O 4 was characterized by field emission scanning electron microscopy and X-ray diffraction (XRD). The results show that the composite electrode material has a nano-rod structure and Mn 3 O 4 is in mixed phase composed of MnO and MnO 2 . The influence factors on the electrochemical performance of electrode materials including manganese content of the precursor, different calcining temperature and time of the precursor were investigated. The results obtained from electrochemical measurement show that the electrode possesses better electrochemical performance with a manganese content of 20 wt % in precursor. In addition, the specific capacitance of CPAC/Mn 3 O 4 nanocomposite electrode material could reach up to 277 F g -1 at a calcining temperature of 500°C and a calcining time of 3 h, respectively.

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Facile synthesis of α-MnO2 nanorods for high-performance alkaline batteries

Cited by 85 publications

References 24 publications

Mechanistic study on the activity of manganese oxide catalysts for oxygen reduction reaction in an aprotic electrolyte

Mechanistic study on the activity of manganese oxide catalysts for oxygen reduction reaction in an aprotic electrolyte

A three-dimensional nanostructured PANI/MnO x porous microsphere and its capacitive performance

Preparation and electrochemical properties of CPAC/Mn3O4 nanocomposite electrode

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