ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)


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Guseva E. S., Popova S. S. Electrochemical Behavior of MnO2-electrode in Aprotic Organic Solutions of Salts of Lanthanum and its Analogs (Rare Earth Elements). Electrochemical Energetics, 2017, vol. 17, iss. 1, pp. 19-28. DOI: 10.18500/1608-4039-2017-17-1-19-28, EDN: ZCTEIL

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Russian
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ZCTEIL

Electrochemical Behavior of MnO2-electrode in Aprotic Organic Solutions of Salts of Lanthanum and its Analogs (Rare Earth Elements)

Autors: 
Guseva Ekaterina Stanislavovna, The Saratov State Technical University of Gagarin Yu. A.
Popova Svetlana Stepanovna, Engelssky Institute of Technology of the Saratov State Technical University
Abstract: 

DOI: https://doi.org/10.18500/1608-4039-2017-17-1-19-28

Method of cathodic introduction of lanthanum and its analogues in dioksigenazy electrode in the potentiostatic mode, the received manganites LnyMn1 ? yO2. For example, lanthanum established the accelerating influence of the phase of the manganite in the composition of the MnO2 electrode in the process of intercalation of lithium. The methods of scanning microscopy, x-ray phase analysis, secondary mass spectrometry of ions and measuring the potential at open circuit constituted LayMn1 ? yO2 and LixLayMn1yO2. Discovered that among the REE (La, Nd, Ho, Sm, Gd, Tb, Yb, Lu, Dy, Eu) from lanthanum (La) to gadolinium (Gd) has been progressively reducing the constant introduction of kiDelta i/Delta (1/sqrt(t)), the diffusion component of the process CLnsqrt(DLn) and density of the discharge current i(0). After gadolinium (Gd) up to the europium (Eu) kinetic characteristics within the error retains a constant value. Discovered two regions of potentials with different trend values of ki,CLnsqrt(DLn) and i(0): the displacement of the potential from ?2.5 to ?2.9 V. In the tendency to their reduction, with a further offset to ?2.0 V. In the upward trend. The influence of temperature and duration of introduction of lantan to the further intercalation of lithium.

Reference: 

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2

1. Popova S. S., Frantsev R. К., Guseva Е. S. Vlijanie prirodi redkozemelnogo metalla na kinetiku electrochimicheskih prozessov na MnO2-electrodah v aprotonnih organicheskih rastvorah. [The earth rare metall nature influence on electrochemical processes on MnO2-electrode in aprotic organic solutions] Electrokhimicheskaja energrtica [Electrochemical Energetics], 2011, vol. 11, no. 2, pp. 108–111 (in Russian).

2. Frantsev R. К., Popova S. S., Guseva Е. S. Electrochimicheskoe intercalirovanie MnO2-electroda v aprotonnih organicheskih rastvorah solej redkozemelnih elementov. Izvestija vishih uchebnih zavedenij [Electrochemical intercalation of the MnO2 electrode in aprotic organic solutions of rare earth salts]. Chemia i chemicheskaja technologija [Chemistry and Chemical Technology], 2011, vol. 54, no. 5, pp. 94–98 (in Russian).

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4. Jang Chang-Chung, Li Sheng-Xian, Shi Zhong, Shi Zhong, Yang Hang-Xi. Charge-discharge characteristics of composite MnO2 cathode doped with metal oxides. 6th Jnt. Meet. Lithium Batteries. Extend. Abstr. and Program. Munster, 1992. P. 315–317.

5. Valand T., Nilsson G. The influence of F? ions on the electrochemical reactions on oxide-covered A1. Corrosion Science, 1977, vol. 17, pp. 449–459.

6. Frantsev R. К., Guseva Е. S., Popova S. S. Sinergeticheskie effekty na LayMnO2 ? ?C60F? – elektrodakh pri katodnoi obrabotke v aprotonnykh organicheskikh rastvorakh solei litiya [Synergetic effects on LayMnO2 ? ?C60F?-electrodes under cathodic treatment in aprotic organic solutions of lithium salts]. Fundamental problems of energy conversion in lithium Electrochemical systems: materials ХI Intern. Conf. [Fundamentalnie problemi preobrazovanija energiy v litievih electrochimicheskih sistemah: ХI Megdunar. konf.], Novocherkarsk, YРGТУ (NPI) Publ., 2010, pp. 98–101 (in Russian).

Received: 
01.03.2017
Accepted: 
01.03.2017
Published: 
21.03.2017