Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites

A comparative quantum chemical (РМ3 method) examination has been carried out of lithiation/delithiation processes in Sin nanoclusters and СmSin nanocomposites. These processes in the nanocomposites (25 and ~30% С, respectively) have been shown to effect slightly on the volumes and structures of init...

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Main Authors: M. T. Kartel, V. S. Kuts, A. G. Grebenyuk, Yu. А. Tarasenko
Format: Article
Language:English
Published: Chuiko Institute of Surface Chemistry of NAS of Ukraine 2015-02-01
Series:Хімія, фізика та технологія поверхні
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Online Access:https://cpts.com.ua/index.php/cpts/article/view/313
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author M. T. Kartel
V. S. Kuts
A. G. Grebenyuk
Yu. А. Tarasenko
author_facet M. T. Kartel
V. S. Kuts
A. G. Grebenyuk
Yu. А. Tarasenko
author_sort M. T. Kartel
collection DOAJ
description A comparative quantum chemical (РМ3 method) examination has been carried out of lithiation/delithiation processes in Sin nanoclusters and СmSin nanocomposites. These processes in the nanocomposites (25 and ~30% С, respectively) have been shown to effect slightly on the volumes and structures of initial (СmSin), lithiated (Lik=0-52СmSin), and delithiated (Lik=52-0СmSin) silicon-carbon matrices Si/С. Electrodes from such materials should not undergo destructive effect of periodic deformations in charge/discharge cycles. On the contrary, at lesser carbon concentrations (С6Si13 nanocomposite, ~16% С) lithiation results in the 1.8 times hopping expansion of V(С6Si13), and delithiation – in the change in structure of initial silicon-carbon matrix Si/С. For Si/С electrodes with greater (more than 37%) carbon concentration (Сm>18Sin composites), lithiation results in a monotonous increase in the volume (1.3 times for С18Si13 and 1.5 times for С26Si13) whereas delithiatin leads to a considerable change in the initial structure of silicon-carbon matrix.
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institution Kabale University
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series Хімія, фізика та технологія поверхні
spelling doaj-art-1fc52809c5ad4c5aae72f2a7e700e5b82025-08-20T03:55:53ZengChuiko Institute of Surface Chemistry of NAS of UkraineХімія, фізика та технологія поверхні2079-17042518-12382015-02-016110.15407/hftp06.01.032Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> NanocompositesM. T. Kartel0V. S. Kuts1A. G. Grebenyuk2Yu. А. Tarasenko3Chuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineChuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineChuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineChuiko Institute of Surface Chemistry of National Academy of Sciences of UkraineA comparative quantum chemical (РМ3 method) examination has been carried out of lithiation/delithiation processes in Sin nanoclusters and СmSin nanocomposites. These processes in the nanocomposites (25 and ~30% С, respectively) have been shown to effect slightly on the volumes and structures of initial (СmSin), lithiated (Lik=0-52СmSin), and delithiated (Lik=52-0СmSin) silicon-carbon matrices Si/С. Electrodes from such materials should not undergo destructive effect of periodic deformations in charge/discharge cycles. On the contrary, at lesser carbon concentrations (С6Si13 nanocomposite, ~16% С) lithiation results in the 1.8 times hopping expansion of V(С6Si13), and delithiation – in the change in structure of initial silicon-carbon matrix Si/С. For Si/С electrodes with greater (more than 37%) carbon concentration (Сm>18Sin composites), lithiation results in a monotonous increase in the volume (1.3 times for С18Si13 and 1.5 times for С26Si13) whereas delithiatin leads to a considerable change in the initial structure of silicon-carbon matrix.https://cpts.com.ua/index.php/cpts/article/view/313silicon nanoclusterssilicon-carbon nanocompositeslithiation/delithiationspecific volumesemiempirical quantum chemical treatment
spellingShingle M. T. Kartel
V. S. Kuts
A. G. Grebenyuk
Yu. А. Tarasenko
Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites
Хімія, фізика та технологія поверхні
silicon nanoclusters
silicon-carbon nanocomposites
lithiation/delithiation
specific volume
semiempirical quantum chemical treatment
title Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites
title_full Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites
title_fullStr Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites
title_full_unstemmed Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites
title_short Comparative Quantum Chemical Examination of Lithiation/Delithiation Processes in Si<sub>n</sub> Nanoclusters and C<sub>m</sub>Si<sub>n</sub> Nanocomposites
title_sort comparative quantum chemical examination of lithiation delithiation processes in si sub n sub nanoclusters and c sub m sub si sub n sub nanocomposites
topic silicon nanoclusters
silicon-carbon nanocomposites
lithiation/delithiation
specific volume
semiempirical quantum chemical treatment
url https://cpts.com.ua/index.php/cpts/article/view/313
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AT aggrebenyuk comparativequantumchemicalexaminationoflithiationdelithiationprocessesinsisubnsubnanoclustersandcsubmsubsisubnsubnanocomposites
AT yuatarasenko comparativequantumchemicalexaminationoflithiationdelithiationprocessesinsisubnsubnanoclustersandcsubmsubsisubnsubnanocomposites