Quaternary transition metal molybdate (Mn 0.25Ni0.25Co0.25Fe0.25MoO4) design to improve the kinetics of the redox reaction in supercapacitors

Appiagyei, Alfred Bekoe; Han, Jeong In

doi:10.1016/j.ceramint.2020.02.004

Cited by 17 publications

(6 citation statements)

References 51 publications

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“…Although molybdenum (Mo) has variable oxidation states, these are not involved in the redox reaction. Instead, they increase electrical conductivity and provide resistance to swelling during the cycling process . However, the redox plateau for Ni X B/MnMoO 4 can be attributed to the intercalation and deintercalation of redox ions at the conductive substrate surface and mainly depends on the reactions described in eqs –. Ni X − B + ( x + 2 ) OH − → Ni ( OH ) 2 + x BO 3 3 − + x H 2 O Ni ( OH ) 2 + OH − → NiOOH + H 2 O + e − MnMoO 4 → Mn false( normalII false) + false[ normalMoO 4 false] 2 − Mn false( normalII false) + 3 OH <...…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Karthik

Sukanya

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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The exploration of heterostructure materials with unique electronic properties is considered a desirable platform for fabricating electrode/surface interface relationships for constructing asymmetric supercapacitors (ASCs) with high energy density. In this work, a heterostructure based on amorphous nickel boride (Ni X B) and crystalline square bar-like manganese molybdate (MnMoO4) was prepared by a simple synthesis strategy. The formation of the Ni X B/MnMoO4 hybrid was confirmed by powder X-ray diffraction (p-XRD), field emission scanning electron microscopy (FE-SEM), field-emission transmission electron microscopy (FE-TEM), Brunauer–Emmett–Teller (BET), Raman, and X-ray photoelectron spectroscopy (XPS). In this hybrid system (Ni X B/MnMoO4), the intact combination of Ni X B and MnMoO4 leads to a large surface area with open porous channels and abundant crystalline/amorphous interfaces with a tunable electronic structure. This Ni X B/MnMoO4 hybrid shows high specific capacitance (587.4 F g–1) at 1 A g–1, and it even retains a capacitance of 442.2 F g–1 at 10 A g–1, indicating superior electrochemical performance. The fabricated Ni X B/MnMoO4 hybrid electrode also exhibited an excellent capacity retention of 124.4% (10000 cycles) and a Coulombic efficiency of 99.8% at a current density of 10 A g–1. In addition, the ASC device (Ni X B/MnMoO4//activated carbon) achieved a specific capacitance of 104 F g–1 at 1 A g–1 and delivered a high energy density of 32.5 Wh.kg–1 with a power density of 750 W·kg–1. This exceptional electrochemical behavior is due to the ordered porous architecture and the strong synergistic effect of Ni X B and MnMoO4, which enhances the accessibility and adsorption of OH– ions that improve electron transport. Moreover, the Ni X B/MnMoO4//AC device exhibits excellent cyclic stability with a retention of 83.4% of the original capacitance after 10000 cycles, which is due to the heterojunction layer between Ni X B and MnMoO4 that can improve the surface wettability without causing structural changes. Our results show that the metal boride/molybdate-based heterostructure is a new category of high-performance and promising material for the growth of advanced energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Karthik

Sukanya

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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“…According to previous reports, due to the synergistic effect of its complicated chemical composition and the significant upgrading of the redox characteristics of Co atoms, and the decent conductivity of Mo atoms, CoMoO 4 displays improved conductivity and greater electrochemical (EC) activity than single cobalt oxide (Co 3 O 4 ). [33,[39][40][41] Herein, we state a simple activation method for carbon cloth, which is further processed as a scaffold to introduce a facile simple strategy for uniform deposition of NiCo nanoneedles in the first hydrothermal treatment followed by a dip-dry coating of NiOOH nanoflakes and CoMoO 4 nanosheets via a second hydrothermal process. The structured ACC@NiCo@NiOOH@CoMoO 4 electrode has demonstrated exceptional specific areal capacitance of 2920 mF cm −2 and established exceptional capacity retention of 87% in 6 m aqueous KOH electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical NiCo@NiOOH@CoMoO₄ Core–Shell Heterostructure on Carbon Cloth for High‐Performance Asymmetric Supercapacitors

Akbar,

Peng,

et al. 2023

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The fabrication of low‐cost, effective, and highly integrated nanostructured materials through simple and reproducible methods for high‐energy‐density supercapacitors is highly desirable. Herein, an activated carbon cloth (ACC) is designed as the functional scaffold for supercapacitors and treated hydrothermally to deposit NiCo nanoneedles working as internal core, followed by a dip‐dry coating of NiOOH nanoflakes core–shell and uniform hydrothermal deposition of CoMoO4 nanosheets serving as an external shell. The structured core–shell heterostructure ACC@NiCo@NiOOH@CoMoO4 electrode resulted in exceptional specific areal capacitance of 2920 mF cm−2 and exceptional cycling stability for 10 000 cycles. Moreover, the fabricated electrode is developed into an asymmetric supercapacitor which demonstrates excellent areal capacitance, energy density, and power density within the broad potential window of 1.7 V with a cycling life of 92.4% after 10 000 charge–discharge cycles, which reflects excellent cycle life. The distinctive core–shell structure, highly conductive substrate, and synergetic effect of coated material results in more electrochemical active sites and flanges for effective electrons and ion transportation. This unique technique provides a new perspective for cost‐efficient supercapacitor applications.

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“…Especially, metal molybdates, MMoO 4 (M: Ni, Co, Mn, etc. ), have been deemed potential candidates owing to their prominent electrochemical properties and inexpensive and abundant resources . In particular, NiMoO 4 is gaining significant attention as a desirable material for high-performance supercapacitors, which is encouraged by the high electrochemical activity of Ni, leading to a high specific capacity. , For instance, α-NiMoO 4 nanorods presented a specific capacitance of 730 F g –1 at 5 mV s –1 , and the corresponding NiMoO 4 //r-GO supercapacitor had a maximum energy density of 12.31 W h kg –1 at a power density of 274.91 W kg –1 .…”

Section: Introductionmentioning

confidence: 99%

In Situ Transformation of Metal Molybdates into Polymetallic Sulfides with Enriched Edge Sites for High-Performance Supercapacitors

Zhang

Zeng

et al. 2023

Inorg. Chem.

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An effective approach to synthesize polycrystalline Ni–Co–Mo sulfide (NiCoMoS) is developed through doping engineering coupled with chemical transformation. The polycrystalline NiCoMoS with enriched active edge sites is designed and fabricated on a Ni foam (NF) via a facile hydrothermal calcination and post-sulfidation approach, where the polycrystalline NiCoMoO4 precursor is elaborately prepared by doping Co ions into the NiMoO4 lattice and subsequently in-situ-converted into NiCoMoS with 3D architectures of ordered nanoneedle arrays. Benefiting from the unique 3D structure and synergistic effects of each component, the optimized needle-like NiCoMoS(2.0) arraying on a NF as a self-standing electrode exhibits superior electrochemical performances with a high specific charge (920.0 C g–1 at 1.0 A g–1), excellent rate capability, and good long-term stability. Furthermore, the assembled NiCoMoS//activated carbon hybrid device presents a satisfactory supercapacitor performance, affording an energy density of 35.2 W h kg–1 at a power density of 800.0 W kg–1 and competitive long-term stability (83.8% retention at 15 A g–1 after 10,000 cycles). Such a novel strategy may pave a new route for exploring other polymetallic sulfides with enriched, exposed active edge sites for energy-related applications.

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Quaternary transition metal molybdate (Mn 0.25Ni0.25Co0.25Fe0.25MoO4) design to improve the kinetics of the redox reaction in supercapacitors

Cited by 17 publications

References 51 publications

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Hierarchical NiCo@NiOOH@CoMoO₄ Core–Shell Heterostructure on Carbon Cloth for High‐Performance Asymmetric Supercapacitors

In Situ Transformation of Metal Molybdates into Polymetallic Sulfides with Enriched Edge Sites for High-Performance Supercapacitors

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Quaternary transition metal molybdate (Mn 0.25Ni0.25Co0.25Fe0.25MoO4) design to improve the kinetics of the redox reaction in supercapacitors

Cited by 17 publications

References 51 publications

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Development of an Amorphous Nickel Boride/Manganese Molybdate Heterostructure as an Efficient Electrode Material for a High-Performance Asymmetric Supercapacitor

Hierarchical NiCo@NiOOH@CoMoO4 Core–Shell Heterostructure on Carbon Cloth for High‐Performance Asymmetric Supercapacitors

In Situ Transformation of Metal Molybdates into Polymetallic Sulfides with Enriched Edge Sites for High-Performance Supercapacitors

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Hierarchical NiCo@NiOOH@CoMoO₄ Core–Shell Heterostructure on Carbon Cloth for High‐Performance Asymmetric Supercapacitors