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A. M. Boichuk, I. M. Hasiuk, R. V. Ilnytskyi, R. P. Lisovskyi, T. Ia. Boichuk, P. O. Sulym
«Diffusion Processes in Solid-Phase Systems Based on the Fe-Containing Ion-Conductive Spinel Matrixes»
477–486 (2017)

PACS numbers: 61.05.cp, 73.63.Bd, 81.20.Fw, 82.45.Yz, 82.47.Uv, 82.47.Wx, 84.32.Tt

In the article, the processes of electrostimulated lithium-ions’ diffusion into the structure of nanosize iron-modified manganese spinel by galvanostatic intermittent titration is studied. As shown, with using sol–gel synthesis at temperature of 800oC, single-phase spinel structure with the arrangement of iron cations in both spinel sublattices is formed that increases both the electrical conductivity and the electrostimulated-diffusion coefficient of lithium. The sizes of individual particles are about 50–70 nm that provides a high rate of electrochemical reactions at the electrode–electrolyte boundary. The dependence of the lithium-ions’ diffusion coefficient on voltage for various aqueous electrolytes is determined, and as shown, regardless of the electrolyte, the most intensive lithium intercalation takes place at voltages of 1.1–1 V relative to chlorine–silver electrode. The diffusion coefficient values are in the range of 10-10–10-9 cm2/sec.

Key words: spinel, cationic substitution, conductivity, electrostimulated diffusion, intermittent galvanostatic titration technique.

https://doi.org/10.15407/nnn.15.03.0477

REFERENCES

1. I. M. Gasyuk, Fizika i Khhimiya Tverdogo Tila, 12, No. 2: 277 (2011).
2. N. Arun, A. Jain, V. Aravindan, S. Jayaraman, W. Ch. Ling, M. P. Srinivasan, and S. Madhavi, Nano Energy, 12, No. 1: 69 (2015).
https://doi.org/10.1016/j.nanoen.2014.12.006
3. T. Ya. Bojchuk, I. M. Budzulyak, N. Ya. Ivanichok, R. P. Lisovs'kyi, and B. I. Rachiy, Zhurnal Nano- ta Elektronnoi Fizyky, 7, No. 1: 01019-1 (2015).
4. I. M. Gasyuk, A. M. Bojchuk, V. V. Ugorchuk, L. S. Kaikan, V. A. Tsap, T. Ya. Bojchuk, Metalofiz. Noveishie Tekhnol., 9, No. 3: 479 (2013).
5. L. Yan, H. Yu, Sh. Qian, P. Li, X. Lin, and Ya. Wu, Electrochimica Acta, 209, No. 1: 17 (2016).
https://doi.org/10.1016/j.electacta.2016.05.040
6. E. V. Lanina, V. D. Zhuravlev, L. V. Ermakova, A. N. Petrov, A. V. Pachuev, and N. V. Sheldeshov, Electrochimica Acta, 212, No. 9: 810 (2016).