Variations of local piezoelectricity in multiferroic CoFe2O4–Pb(Zr0.3,Ti0.7)O3 composite nanofibers

Fu, Bi; Lu, Ruie; Liu, Miao; Gao, Kun; Tong, Yigang; Zhou, Xuan; Guo, Baolin; Yang, Yaodong; Wang, Yaping

doi:10.1016/j.matlet.2015.05.149

Cited by 8 publications

(3 citation statements)

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“…There is an additional broad diffraction peak located at 13.5° in XRD pattern of Co 3 O 4 @CNFs, revealing the amorphous carbon. The average crystalline size of Co 3 O 4 @NFs and Co 3 O 4 @CNFs were calculated according to the peaks broadening of (311) reflection using Scherrer equation, which were estimated to be 6.1 and 5.2 nm, respectively. TG curve in Figure (b) reveals that the primary weight loss of Co 3 O 4 @CNFs is range from 340 to 450 °C and the carbon content was estimated to be 54%.…”

Section: Resultsmentioning

confidence: 99%

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co₃O₄ Carbon Nanofibers

Liu

Dai

et al. 2019

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Co3O4@nanofibers (NFs) and Co3O4@carbon NFs (CNFs) were synthesized by sol‐gel electrospinning followed by annealing in air and Ar atmosphere, respectively. Co3O4@NFs and Co3O4@CNFs deliver stable cyclic performance with Li storage capacity of 330 and 400mAh/g after 170 and 200 cycles, respectively. Co3O4@CNFs deliver higher Li storage capacity more than Co3O4@NFs at each current densities in rate performance. More importantly, Co3O4@CNFs demonstrated relatively smaller internal resistance result from the comparison of electrochemical independence spectrum. Further morphology observation of the cycled electrodes indicates that the one‐dimensioncal nanostrucutre of the Co3O4@CNFs is still maintaned after reacting with Li+, which is singnicicant to the electrochemical cyclic performance. This study indicates the internal resistance can be decreased by increasing electronical conductivity through electrospinning carbon coating layer, resulting in an enhanced energy storage performance.

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Section: Resultsmentioning

confidence: 99%

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co₃O₄ Carbon Nanofibers

Liu

Dai

et al. 2019

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“…In contrast, multiferroic composites have impressed indirect ME coupling at room temperature, originating from the coupling of magnetostrictive and piezoelectric through strain media [5,6]. The intensity of the strain is studied as a function of the interface area between ferromagnetic and ferroelectric outlines [7,8]. Based on this, 1D multiferroic nanocomposites become hot topics due to their high surface to volume ratio, and, therefore, enable potential applications in sensors, micro-/nano-ME systems, and dual read-write memory devices [9,10].…”

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“…Based on this, 1D multiferroic nanocomposites become hot topics due to their high surface to volume ratio, and, therefore, enable potential applications in sensors, micro-/nano-ME systems, and dual read-write memory devices [9,10]. There are various methods which were (a) E-mail: fubi@mail.xjtu.edu.cn (b) E-mail: yaodongyang@mail.xjtu.edu.cn (c) E-mail: ypwang@mail.xjtu.edu.cn used to synthesise 1D multiferroic nanocomposites, including template-assistant approaches [11][12][13], hydrothermal methods [14], and electrospinning technique [7,15], etc. Among them, electrospinning is a convenient and versatile technique to synthesise ultra-long and continuous structure multiferroic composite NFs [16][17][18][19], resulting in an increase in ferroic orders interface area and thus enhanced the ME coupling [1,11].…”

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Substrate clamping effect onto magnetoelectric coupling in multiferroic BaTiO ₃ -CoFe ₂ O ₄ core-shell nanofibers via coaxial electrospinning

Fu¹,

Lu²,

Gao³

et al. 2015

EPL

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We report large lateral magnetoelectric (ME) coupling coefficients α31 of 1.2 × 10 4 mV cm −1 Oe −1 and 3.5 × 10 4 mV cm −1 Oe −1 in substrate bonded and free-standing multiferroic BaTiO3-CoFe2O4 (BTO-CFO) core-shell nanofibers (NFs) with and without substrate clamping effect, respectively. The BTO-CFO core-shell NFs were synthesised by a sol-gel coaxial electrospinning technique, and their ME coupling was directly observed by demonstrating the evolution of piezoelectric coefficient (d33), ferroelectric domain, and phase contrast induced by an external magnetic field. These impressed α31 coefficients originated from the nanoconfinement of the interphase elastic interaction between the ferromagnetic core fiber and the ferroelectric shell interlayer, as well as the strain transformation at the one-dimensional (1D) fiber boundary. This means that the decreasing substrate clamping effect results in an enhanced ME coupling in multiferroic NFs, which is similar to that of thin films. These findings make people understand the substrate clamping effect and enable nanoscale ME device applications.

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Freestanding SnS Carbon Composite Nanofiber Material with Excellent Electrochemical Performance as Binder‐Free Negative Electrode for Lithium‐ion Batteries

Liu

Dai

et al. 2020

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Metal sulfide demonstrated sluggish ionic transport kinetics due to the low electronic conductively, resulting larger volume expansion and even pulverize electrode during Li + insertion/ deinsertion. In this study, freestanding SnS nanoflower@carbon nanofiber (SnS@CNF) was prepared by the sol-gel electrospinning of hydrothermal synthesized SnS 2 nanoflower and carbonization. When direct used SnS@CNF as a binder-free negative electrode for LIB, it delivered specific capacity of 564.4 mAh g À 1 @0.3 C after 450 cycles, and high rate capacities of 595, 465, 354, 267, 200, 129, 74, and 484 mAh g À 1 at the current densities of 0.064, 0.1, 0.3, 0.6, 1.0, 1.5, 2.0, and 0.1 mA g À 1 , respectively. Such excellent electrochemical performance is attributed to the nanostructured conductive CNF network not only can buffer volume expansion and prevents the aggregation of active material, but also improve Li + migration rates during the discharge (4.47 × 10 À 7 cm 2 s À 1 ) and charge (2.73 × 10 À 6 cm 2 s À 1 ) process.

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Variations of local piezoelectricity in multiferroic CoFe2O4–Pb(Zr0.3,Ti0.7)O3 composite nanofibers

Cited by 8 publications

References 10 publications

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co₃O₄ Carbon Nanofibers

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co₃O₄ Carbon Nanofibers

Substrate clamping effect onto magnetoelectric coupling in multiferroic BaTiO ₃ -CoFe ₂ O ₄ core-shell nanofibers via coaxial electrospinning

Freestanding SnS Carbon Composite Nanofiber Material with Excellent Electrochemical Performance as Binder‐Free Negative Electrode for Lithium‐ion Batteries

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Variations of local piezoelectricity in multiferroic CoFe2O4–Pb(Zr0.3,Ti0.7)O3 composite nanofibers

Cited by 8 publications

References 10 publications

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co3O4 Carbon Nanofibers

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co3O4 Carbon Nanofibers

Substrate clamping effect onto magnetoelectric coupling in multiferroic BaTiO 3 -CoFe 2 O 4 core-shell nanofibers via coaxial electrospinning

Freestanding SnS Carbon Composite Nanofiber Material with Excellent Electrochemical Performance as Binder‐Free Negative Electrode for Lithium‐ion Batteries

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Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co₃O₄ Carbon Nanofibers

Study the Mechanism of Enhanced Li Storage Capacity through Decreasing Internal Resistance by High Electronical Conductivity via Sol‐gel Electrospinning of Co₃O₄ Carbon Nanofibers

Substrate clamping effect onto magnetoelectric coupling in multiferroic BaTiO ₃ -CoFe ₂ O ₄ core-shell nanofibers via coaxial electrospinning