Synthesis of Fe3O4/C composite as electrochemical capacitor in aqueous electrolytes

Pratiwi, Vania Mitha; Ratfiandini, R. N.; Wangling, D. A.; Mahmudi,; Setyawan, Heru

doi:10.1063/1.4866745

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“…The peak at 0.07 V corresponded to the oxidation reaction of Fe 3 O 4 to FeOOH. 34,35 After 30 cycles, there were deposits on the surface of the Fe 3 O 4 /Ti 3 C 2 T x nanocomposites (Figure S6B). These results indicated that the deposits in AFM images (Figure 2) could be assigned to the accumulation of FeOOH on the Fe 3 O 4 /Ti 3 C 2 T x nanocomposites during potential cycling.…”

Section: Resultsmentioning

confidence: 99%

“…In the 2nd and 30th voltammograms of Fe 3 O 4 /Ti 3 C 2 T x nanocomposites, a distinct oxidation peak at about 0.07 V could be observed, indicating the irreversible and pseudocapacitive nature of the Fe 3 O 4 /Ti 3 C 2 T x nanocomposites (Figure B). The peak at 0.07 V corresponded to the oxidation reaction of Fe 3 O 4 to FeOOH. , After 30 cycles, there were deposits on the surface of the Fe 3 O 4 /Ti 3 C 2 T x nanocomposites (Figure S6B). These results indicated that the deposits in AFM images (Figure ) could be assigned to the accumulation of FeOOH on the Fe 3 O 4 /Ti 3 C 2 T x nanocomposites during potential cycling.…”

Section: Resultsmentioning

confidence: 99%

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Morphological Evolutions of Ti₃C₂T_x Nanosheets and Fe₃O₄/Ti₃C₂T_x Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

et al. 2021

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Understanding of the surface mechanism of electrode materials based on MXenes, such as morphological evolution, is of great significance for improving reaction kinetics and efficiency. In this paper, the morphological evolutions of Ti3C2T x nanosheets and Fe3O4/Ti3C2T x nanocomposites during potential cycling were explored by electrochemical atomic force microscopy for the first time. The oxidation reaction of Fe nanocomposites during potential cycling were explored by in situ electrochemical atomic force microscopy for the first time. The oxidation reaction of Fe3O4 to FeOOH and the accumulation of FeOOH on the Fe3O4/Ti3C2T x nanocomposites during potential cycling resulted in the appearance of deposits on the surface. After 70 cycles, cracks formed in the Fe3O4/Ti3C2T x nanocomposites, which might be caused by the falling of the deposits and the loss of Fe species during potential cycling. The Ti3C2T x nanosheets became higher, and the volume expanded significantly during potential cycling. The specific capacitance of Fe3O4/Ti3C2T x nanocomposites was higher than that of Ti3C2T x nanosheets. Their specific capacitances gradually decreased during potential cycling, which could be assigned to the morphological evolutions. The loading of Fe3O4 nanoparticles in the Ti3C2T x nanosheets played very important roles in morphological evolutions and electrochemical properties. Comprehending morphological evolutions of Ti3C2T x nanosheets and Fe3O4/Ti3C2T x nanocomposites during potential cycling is very beneficial to design electrode materials and interfacial constructions based on MXenes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Morphological Evolutions of Ti₃C₂T_x Nanosheets and Fe₃O₄/Ti₃C₂T_x Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

et al. 2021

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Synthesis of Fe3O4/C composite as electrochemical capacitor in aqueous electrolytes

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Morphological Evolutions of Ti₃C₂T_x Nanosheets and Fe₃O₄/Ti₃C₂T_x Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

Morphological Evolutions of Ti₃C₂T_x Nanosheets and Fe₃O₄/Ti₃C₂T_x Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

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Synthesis of Fe3O4/C composite as electrochemical capacitor in aqueous electrolytes

Cited by 1 publication

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Morphological Evolutions of Ti3C2Tx Nanosheets and Fe3O4/Ti3C2Tx Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

Morphological Evolutions of Ti3C2Tx Nanosheets and Fe3O4/Ti3C2Tx Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

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Morphological Evolutions of Ti₃C₂T_x Nanosheets and Fe₃O₄/Ti₃C₂T_x Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy

Morphological Evolutions of Ti₃C₂T_x Nanosheets and Fe₃O₄/Ti₃C₂T_x Nanocomposites under Potential Cycling Investigated Using In Situ Electrochemical Atomic Force Microscopy