Formation of 2:1 Li-Fe-phyllosilicate with montmorillonite-like structure in hydrothermal conditions
A. A. Iyakhmaeva, 
E. K. Khrapova,
L. A. Lebedev,
N. V. Glebova,
V. G. Semenov,
A. V. Kopylov,
A. A. Krasilin
E. K. Khrapova,
L. A. Lebedev,
N. V. Glebova,
V. G. Semenov,
A. V. Kopylov,
A. A. Krasilin https://doi.org/10.17586/2220-8054-2025-16-6-837-849
Abstract
We report on hydrothermal synthesis and structural characterization of Li–Fe-montmorillonite (MMT). To date, this 2:1 type phyllosilicate attracts attention due to such properties as high ion mobility, hydrophilicity, electrical and thermal resistance. Due to that, various MMTs may serve as perspective components of Li-ion batteries (electrolyte and separator fillers, as well as protective buffer layer on top of Li metal anode). Scarce data on synthetic Li–Fe3+-MMTs motivated us to investigate formation process and structure features of such phyllosilicate by X-ray diffraction, UV-visible and Mossbauer spectroscopy, and other methods. We established critical Fe3+ content and temperature range needed for almost single-phase MMTs formation. Around 20 % of total Fe may occupy tetrahedral site of MMT layer. Thermal behavior of Li–Fe-MMT strongly depends on hydrothermal synthesis conditions because of different Li+ amount present in the interlayer space and in the layer vacancies.
Keywords
Supporting agencies: This work was supported by the St. Petersburg Science Foundation and the Russian Science Foundation [grant number 25-19-20096], https://rscf.ru/project/25-19-20096/.
About the Authors
A. A. Iyakhmaeva
Ioffe Institute
Russian Federation
Russian Federation
Asiyat A. Iyakhmaeva
194021 St. Petersburg
E. K. Khrapova
Ioffe Institute
Russian Federation
Russian Federation
Ekaterina K. Khrapova
194021 St. Petersburg
L. A. Lebedev
Ioffe Institute
Russian Federation
Russian Federation
Lev A. Lebedev
194021 St. Petersburg
N. V. Glebova
Ioffe Institute
Russian Federation
Russian Federation
Nadezhda V. Glebova
194021 St. Petersburg
V. G. Semenov
Institute of Chemistry, St. Petersburg State University
Russian Federation
Russian Federation
Valentin G. Semenov
194021 St. Petersburg
A. V. Kopylov
RITVERC JSC
Russian Federation
Russian Federation
Andrey V. Kopylov
St. Petersburg, 194223
A. A. Krasilin
Ioffe Institute
Russian Federation
Russian Federation
Andrei A. Krasilin
194021 St. Petersburg
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For citations:
Iyakhmaeva A.A., Khrapova E.K., Lebedev L.A., Glebova N.V., Semenov V.G., Kopylov A.V., Krasilin A.A. Formation of 2:1 Li-Fe-phyllosilicate with montmorillonite-like structure in hydrothermal conditions. Nanosystems: Physics, Chemistry, Mathematics. 2025;16(6):837-849. https://doi.org/10.17586/2220-8054-2025-16-6-837-849
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