Electrochemical evaluation of porous CaFe2O4 anode material prepared via solution combustion synthesis at increasing fuel-to-oxidizer ratios and calcination temperatures

The drawbacks of common anodes in lithium-ion batteries (LIBs) and hybrid supercapacitors (HSCs), such as the high voltage plateau of Li 4 Ti 5 O 12 (1.55 V vs. Li/Li + ) and the moderate capacity of graphite (372 mAh-g -1 ), have established a need for better materials. Conversion materials, and in...

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Bibliographic Details
Published in:Scientific reports 2022-02, Vol.12 (1), p.3082-3082, Article 3082
Main Authors: Strimaitis, Jacob, Danquah, Samuel A., Denize, Clifford, Pradhan, Sangram K., Bahoura, Messaoud
Format: Article
Language:English
Subjects:
639/301/357/551
639/4077/4079/4105
639/4077/4079/891
Combustion
Crystals
Electrochemistry
Energy storage
Graphite
High voltage
Humanities and Social Sciences
Iron oxides
Lithium
multidisciplinary
Nanoparticles
Science
Science (multidisciplinary)
Temperature
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Summary:The drawbacks of common anodes in lithium-ion batteries (LIBs) and hybrid supercapacitors (HSCs), such as the high voltage plateau of Li 4 Ti 5 O 12 (1.55 V vs. Li/Li + ) and the moderate capacity of graphite (372 mAh-g -1 ), have established a need for better materials. Conversion materials, and in particular iron oxide and CaFe 2 O 4 (CFO), have amassed recent attention as potential anode replacements. In this study, we evaluate the material and electrochemical effects of the solution combustion synthesis (SCS) of porous CFO across novel fuel-to-oxidizer ratios and calcination temperatures. We demonstrate that nearly doubling the amount of fuel used during synthesis increases capacities between 120 and 150% at high current densities (~ 1000 mA-g -1 ) and across 500 additional charging-discharging cycles, an effect brought on in part by enhanced compositional purity in these samples. However, in order to ensure long-term cyclic stability, it is necessary to also calcine porous CFO to 900 °C to enhance crystallite size, particle size and spacing, and compositional purity.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-07036-3