A facile electrosynthesis approach of Mn-Ni-Co ternary phosphides as binder-free active electrode materials for high-performance electrochemical supercapacitors

Saleh, Amina A.; Amer, Aya; Sayed, Doha M.; Allam, Nageh K.

doi:10.1016/j.electacta.2021.138197

Cited by 57 publications

(42 citation statements)

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“…The Nyquist plot of the Ni–Mn–O@C electrode shows an infinitely small semicircle attributed to a charge transfer resistance of 2.4 Ω. , To this end, we successfully fabricated an efficient binder-free electrode, which facilitates the transfer of charges across the interface region and provides better electrolyte accessibility in the cross-linked channels of the electrode. The highly porous, high surface area fibrous structure should also provide more charge transfer active sites. ,, These results indicate the superiority of the prepared nanofibers and their outstanding electrochemical stability and recyclability.…”

Section: Resultsmentioning

confidence: 79%

Binder-Free Electrospun Ni–Mn–O Nanofibers Embedded in Carbon Shells with Ultrahigh Energy and Power Densities for Highly Stable Next-Generation Energy Storage Devices

et al. 2021

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We demonstrate the fabrication of binder-free electrospun nickel− manganese oxides embedded into carbon-shell fibrous electrodes. The morphological and structural properties of the assembled electrode materials were elucidated by high-resolution transmission electron microscopy (HR-TEM), field-emission scanning electron microscopy, and glancing-angle X-ray diffraction. The fibrous structure of the electrodes was retained even after annealing at high temperatures. The X-ray photoelectron spectroscopy and HR-TEM analyses revealed the formation of nickel and manganese oxides in multiple oxidation states (Ni 2+ , Ni 3+ , Mn 2+ , Mn 3+ , and Mn 4+ ) embedded in the carbon shell. The embedded nickel−manganese oxides into the carbon matrix fibrous electrodes exhibit an excellent capacitance (1082 F/g) in 1 M K 2 SO 4 at 1 A/g and possess a high rate capability of 73% at 5 A/g. The high rate capability and capacitance can be attributed to the presence of carbon crosslinked channels, the binder-free nature of the electrodes, and various oxidation states of the Ni−Mn oxides. The asymmetric supercapacitor device constructed of the asfabricated nanofibers and the bio-derived microporous carbon as the positive and negative electrodes, respectively, sustains up to 1.9 V with a high specific capacitance at 1.5 A/g of 108 F/g. The nanofibrous//bio-derived device exhibits an outstanding specific energy of 54.2 W h/kg with a high specific power of 1425 W/kg. Interestingly, the tested device maintains a high capacitive retention of 92% upon cycling over 10,000 charging/discharging cycles.

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Section: Resultsmentioning

confidence: 79%

Binder-Free Electrospun Ni–Mn–O Nanofibers Embedded in Carbon Shells with Ultrahigh Energy and Power Densities for Highly Stable Next-Generation Energy Storage Devices

et al. 2021

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“…Though numerous efforts have been made to prepare binary metallic phosphides as electrode materials, minimal attempts have been devoted to developing ternary metallic phosphides for energy storage purposes. Recently, ternary metal phosphides as electrode materials for high‐performance supercapacitor applications have been prepared by electrodeposition method followed by PH 3 plasma treatment [215] . An architecture with a 3D network, besides the positive synergistic effect of ternary metals, demonstrated an efficient manner that facilitates the transfer of electrolyte ions.…”

Section: Electrode Materials Prepared By Electrochemical Deposition A...mentioning

confidence: 99%

Recent Advancements in Electrochemical Deposition of Metal‐Based Electrode Materials for Electrochemical Supercapacitors

Islam

Mia

Shah

et al. 2022

The Chemical Record

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The demand for energy storage devices with high energy and power densities has increased tremendously in this rapidly growing world. Conventional capacitors, fuel cells, and lithium‐ion batteries have been used as energy storage devices for the long term. However, supercapacitors are one of the most promising energy storage devices because of their high specific capacitance, high power density, and longer cycle life. Recent research has focused on synthesizing transition‐metal oxides/hydroxides, carbon materials, and conducting polymers as supercapacitor electrode materials. The performance of supercapacitors can be improved by altering electrolytes, electrode materials, current collectors, experimental temperatures, and film thickness. Thousands of papers on supercapacitors have already been published, reflecting the significance and elucidating how much demanding such energy storage devices for this fast‐growing generation. This review aims to illustrate the electrode materials loaded on various conductive substrates by electrochemical deposition employed for supercapacitors to provide broad knowledge on synthetic pathways, which will pave the way for future research. We also discussed the basic parameters involved in supercapacitor studies and the advantages of the electrochemical deposition techniques through literature analysis. Finally, future trends and directions on exploring metals/metal composites toward designing and constructing viable, high‐class, and even newly featured flexible energy storage materials, electrodes, and systems are presented.

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“…8,9 In contrast, the H-SC is the term used when the device contains one battery-like electrode material. 8,10 To this end, the studies targeting high-performance A-SCs and H-SCs are mainly focused on the improvement of the anode materials, with little attention devoted to developing negative electrode materials. 11−14 The inefficient performance of either the positive or negative electrode will restrict the full tapped capacitance of the device, limiting the overall device performance.…”

Section: ■ Introductionmentioning

confidence: 99%

Optimized Lithography-Free Fabrication of Sub-100 nm Nb₂O₅ Nanotube Films as Negative Supercapacitor Electrodes: Tuned Oxygen Vacancies and Cationic Intercalation

Sayed

Salem

Allam

2022

ACS Appl. Mater. Interfaces

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The direct growth of sub-100 nm thin-film metal oxides has witnessed a sustained interest as a superlative approach for the fabrication of smart energy storage platforms. Herein, sub-100 nm Zr-doped orthorhombic Nb 2 O 5 nanotube films are synthesized directly on the Nb-Zr substrate and tested as negative supercapacitor electrode materials. To boost the pseudocapacitive performance of the fabricated films, supplement Nb 4+ active sites (defects) are subtly induced into the metal oxide lattice, resulting in 13% improvement in the diffusion current at 100 m V/s over that of the defect-free counterpart. The defective sub-100 nm film (H-NbZr) exhibits areal and volumetric capacitances of 6.8 mF/cm 2 and 758.3 F/cm 3 , respectively. The presence of oxygen-deficient states enhances the intrinsic conductivity of the thin film, resulting in a reduction in the band gap energy from 3.25 to 2.5 eV. The assembled supercapacitor device made of nitrogen-doped activated carbon (N-AC) and H-NbZr (N-AC//H-NbZr) is able to retain 93, 83, 78, and 66% of its first cycle capacitance after 1000, 2000, 3000, and 4500 successive charge/discharge cycles, respectively. An eminent energy record of approximately 0.77 μW h/cm 2 at a power of 0.9 mW/cm 2 is achieved at 1 mA/cm 2 with superb capability.

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A facile electrosynthesis approach of Mn-Ni-Co ternary phosphides as binder-free active electrode materials for high-performance electrochemical supercapacitors

Cited by 57 publications

References 65 publications

Binder-Free Electrospun Ni–Mn–O Nanofibers Embedded in Carbon Shells with Ultrahigh Energy and Power Densities for Highly Stable Next-Generation Energy Storage Devices

Binder-Free Electrospun Ni–Mn–O Nanofibers Embedded in Carbon Shells with Ultrahigh Energy and Power Densities for Highly Stable Next-Generation Energy Storage Devices

Recent Advancements in Electrochemical Deposition of Metal‐Based Electrode Materials for Electrochemical Supercapacitors

Optimized Lithography-Free Fabrication of Sub-100 nm Nb₂O₅ Nanotube Films as Negative Supercapacitor Electrodes: Tuned Oxygen Vacancies and Cationic Intercalation

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A facile electrosynthesis approach of Mn-Ni-Co ternary phosphides as binder-free active electrode materials for high-performance electrochemical supercapacitors

Cited by 57 publications

References 65 publications

Binder-Free Electrospun Ni–Mn–O Nanofibers Embedded in Carbon Shells with Ultrahigh Energy and Power Densities for Highly Stable Next-Generation Energy Storage Devices

Binder-Free Electrospun Ni–Mn–O Nanofibers Embedded in Carbon Shells with Ultrahigh Energy and Power Densities for Highly Stable Next-Generation Energy Storage Devices

Recent Advancements in Electrochemical Deposition of Metal‐Based Electrode Materials for Electrochemical Supercapacitors

Optimized Lithography-Free Fabrication of Sub-100 nm Nb2O5 Nanotube Films as Negative Supercapacitor Electrodes: Tuned Oxygen Vacancies and Cationic Intercalation

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Optimized Lithography-Free Fabrication of Sub-100 nm Nb₂O₅ Nanotube Films as Negative Supercapacitor Electrodes: Tuned Oxygen Vacancies and Cationic Intercalation