Enhanced photophysical and electrochemical properties of 2D layered rGO and MoS$$_2$$ integrated polypyrrole (rGO-PPy-MoS$$_2$$) composite

Nayak, Debashish; Choudhary, Raveena

doi:10.1007/s10853-023-08572-7

Cited by 7 publications

(1 citation statement)

References 75 publications

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“…The high magnetization and pseudocapacitive properties of BFO make it a promising magnetically ordered pseudocapacitive (MOPC) material. It is in this regard that many MOPC materials [19], such as Fe 3 O 4 , γ-Fe 2 O 3 , CuFe 2 O 4 , NiFe 2 O 4 , and CoFe 2 O 4 , shown by a factor 10 6 higher capacitance, compared to multiferroics [19][20][21][22][23][24][25]. MOPC exhibits interesting effects related to the coupling of electrochemical charge storage and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Charge Storage Properties of Ferrimagnetic BaFe12O19 and Polypyrrole–BaFe12O19 Composites

Chen,

Zhitomirsky

2024

Molecules

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This investigation is motivated by an interest in multiferroic BaFe12O19 (BFO), which combines advanced ferrimagnetic and ferroelectric properties at room temperature and exhibits interesting magnetoelectric phenomena. The ferroelectric charge storage properties of BFO are limited due to high coercivity, low dielectric constant, and high dielectric losses. We report the pseudocapacitive behavior of BFO, which allows superior charge storage compared to the ferroelectric charge storage mechanism. The BFO electrodes show a remarkably high capacitance of 1.34 F cm−2 in a neutral Na2SO4 electrolyte. The charging mechanism is discussed. The capacitive behavior is linked to the beneficial effect of high-energy ball milling (HEBM) and the use of an efficient dispersant, which facilitates charge transfer. Another approach is based on the use of conductive polypyrrole (PPy) for the fabrication of PPy-BFO composites. The choice of new polyaromatic dopants with a high charge-to-mass ratio plays a crucial role in achieving a high capacitance of 4.66 F cm−2 for pure PPy electrodes. The composite PPy-BFO (50/50) electrodes show a capacitance of 3.39 F cm−2, low impedance, reduced charge transfer resistance, enhanced capacitance retention at fast charging rates, and good cyclic stability due to the beneficial effect of advanced dopants, HEBM, and synergy of the contribution of PPy and BFO.

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