Synthesis and Study of Cathode Materials Based on Carbon Nanotubes for Lithium-Ion Batteries

Synthesis and Study of Cathode Materials Based on Carbon Nanotubes for Lithium-Ion Batteries

This work presents a study of the conditions and possibilities for the intercalation of hexafluorophosphate anions into CNT-based electrodes. For this, cathodes based on CNTs synthesized on different catalysts (Co–Mo)/(Al 2 O 3 –MgO) and (Fe–Co)/ 2.1 Al 2 O 3 were produced. As a result, electrode ma...

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Bibliographic Details
Published in:Inorganic materials : applied research Vol. 12; no. 5; pp. 1281 - 1287
Main Authors: Shchegolkov, A. V., Komarov, F. F., Lipkin, M. S., Milchanin, O. V., Parfimovich, I. D., Semenkova, A. V., Velichko, A. V., Chebotov, K. D., Nokhaeva, V. A.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-09-2021
Springer Nature B.V
Subjects:
Admixtures
Aluminum oxide
Carbon nanotubes
Cathodes
Chemical synthesis
Chemistry
Chemistry and Materials Science
Discharge
Electrode materials
Electrodes
General-Purpose Materials
Graphite
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Lithium
Lithium-ion batteries
Materials Science
Mathematical analysis
Rechargeable batteries
cyclic voltammetry (CVA)
carbon nanotubes
intercalation of anions
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Summary:This work presents a study of the conditions and possibilities for the intercalation of hexafluorophosphate anions into CNT-based electrodes. For this, cathodes based on CNTs synthesized on different catalysts (Co–Mo)/(Al 2 O 3 –MgO) and (Fe–Co)/ 2.1 Al 2 O 3 were produced. As a result, electrode materials were obtained at various concentrations of CNT/graphite: CNT-4F, CNT-6, and CNT-6F. The resulting electrodes were studied by cyclic voltammetry (CVA) in an electrolyte of a dissolved LiPF 6 salt based on EC : DEC (ethylene carbonate : diethylene carbonate) solvents (in the ratio 1 : 1 : 1) with an admixture of 3% VC at a sweep speed of 4 mV/s. On the basis of the obtained CVA dependences, the specific charge/discharge capacity of the electrodes CNT-4F, CNT-6, and CNT-6F was determined. The largest specific charge/discharge capacity calculated per mass of CNTs was 292 and 164.22 (mA h)/g for CNT-4/graphite electrodes, and the minimum specific charge/discharge capacity was 41.67 and 1.5 (mA h)/g for CNT-4 electrodes without graphite, respectively. Also, the dependences of the average electrode utilization coefficient on the charge time at constant current on the cycle number at a charge of 300 s were obtained. For chronoamperograms of individual steps of the СNT-6F electrode, the values of lithium diffusion coefficients were calculated.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113321050373