Morphology-dependent NiMoO4/carbon composites for high performance supercapacitors

Zhang, Yong; Chang, Cui-rong; Jia, Xiaodong; Huo, Qing-yuan; Gao, Haili; Yan, Ji; Zhang, Aiqin; Ru, Yi; Mei, Han-xin; Gao, Kezheng; Wang, Lizhen

doi:10.1016/j.inoche.2019.107631

Cited by 91 publications

(29 citation statements)

References 44 publications

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“…Fig 3A shows the cyclic voltammetry (CV) curves of NMOG-G, NMOG-GLC24, NMOG-GHC24, and NMOG-GHC60 electrodes at a scan rate of 5 mV s −1 and over a voltage range of 0–0.7 V. All CV curves display two redox peaks, corresponding to the reversible redox reactions of Ni 2+ ↔ Ni 3+ +e − [ 16 , 26 ]. This confirms the Faradaic behavior of NiMoO 4 nanorods.…”

Section: Resultsmentioning

confidence: 99%

“…Supercapacitors are renewable energy storage devices that are increasingly attracting attention due to their high capacitance, high power density, long cycle life, and wide operating voltage ranges [ 1 , 2 ]. Nowadays, it is essential to consider utilizing materials with sustainable and green characteristics in energy storage applications [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Various metal oxides such as CoMoO 4 [ 9 ], FeMoO 4 [ 10 ], NiCo 2 O 4 [ 11 ], MnMoO 4 [ 12 ], and NiMoO 4 [ 13 , 14 ] have all been used in supercapacitor electrodes. However, nickel molybdate (NiMoO 4 ) is considered an especially promising material for the electrode due to its high theoretical specific capacitance, battery-type behavior, low cost, and abundance [ 15 , 16 ]. To produce an electrode, active material such as NiMoO 4 /nanographite (NG) is coated on a current collector.…”

Section: Introductionmentioning

confidence: 99%

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Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

et al. 2021

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The cycling performance of supercapacitors sometimes becomes limited when electrode materials slough off during frequent charge–discharge cycles, due to weak bonding between the active material and the current collector. In this work, a flexible graphite foil substrate was successfully used as the current collector for supercapacitor electrodes. Graphite foil substrates were treated in different ways with different acid concentrations and temperatures before being coated with an active material (NiMoO4/nanographite). The electrode treated with HNO3 (65%) and H2SO4 (95%) in a 1:1 ratio at 24°C gave better electrochemical performance than did electrodes treated in other ways. This electrode had capacitances of 441 and 184 Fg–1 at current densities of 0.5 and 10 Ag-1, respectively, with a good rate capability over the current densities of the other treated electrodes. SEM observation of the electrodes revealed that NiMoO4 with a morphology of nanorods 100–120 nm long was properly accommodated on the graphite surface during the charge–discharge process. It also showed that treatment with high-concentration acid created an appropriately porous and rough surface on the graphite, enhancing the adhesion of NiMoO4/nanographite and boosting the electrochemical performance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

et al. 2021

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“…Electrolytic manganese dioxide can be formed from the direct electrolysis of an aqueous bath containing manganese sulfate in sulfuric acid. Electrodeposition is a simple technique that could be conducted with moderate experimental conditions to tune the material properties such as particle size, density, and morphology, , which greatly influence the electrochemical energy storage properties . Based on the applied voltage or current, the deposition techniques can be categorized as galvanostatic (GS), potentiostatic (PS), and cyclic voltammetry (CV).…”

Section: Introductionmentioning

confidence: 99%

Alginate Biopolymer Effect on the Electrodeposition of Manganese Dioxide on Electrodes for Supercapacitors

Wickramaarachchi

Minakshi

Henry

et al. 2021

ACS Appl. Energy Mater.

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Electrolytic manganese dioxide (EMD) synthesized from different electrolytic baths with varying biopolymer additive concentrations has been investigated for application as an electrochemical supercapacitor. Alginic acid, also termed “alginate”, is a widely used biopolymer for various biological applications due to its physicochemical properties. Here, the EMD material synthesized with alginate crosslinking was introduced in the field of electrochemistry for supercapacitors. Different EMD and alginate composites were characterized to find the trade-off between the biopolymer content in the bath and the energy storage capability. Compared to the pristine EMD, the EMD composites at all of the alginate concentrations influenced both the physical and the electrochemical storage properties of the materials. The presence of alginate in the solution at higher concentrations altered the morphology from spindle-shaped to cactus-shaped with flutes. Rearranged morphology and enhanced particle size are attributed to the ability of the alginate to act as a template for binding the Mn2+ ions on the substrate in a relatively ordered and widely distributed manner. The EMD composite delivered 5 times higher capacitance (487 F g–1) than the pristine EMD at a current density of 1 mA cm–2 in a three-electrode system using a 2 M NaOH aqueous electrolyte. When the EMD composite was coupled with activated carbon, the asymmetric device exhibited 52 F g–1 capacitance at a current density of 2 mA cm–2 while giving excellent capacitance retention (94%) over 5000 cycles. The molecular dynamics simulation model supported the influence of alginate on ion–polymer interactions in the electrolytic bath. The simulations showed that the alginate provides a template for binding Mn2+ ions in a relatively ordered manner. It could assist the EMD/Alg composite growth in a more favorable condition for energy storage applications.

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“…6 Among several energy storage materials, transition metal oxides (TMOs) are considered the most reliable species for hybrid-type supercapacitors due to their versatile valencies and electrochemical characteristics. 7 These electrochemical properties can be further enhanced by adopting bimetallic or trimetallic oxides over single metal oxides. The multiple transition metal species can provide additional oxidation states and can exalt the redox kinetics during the electrochemical activity.…”

Section: Introductionmentioning

confidence: 99%

Carbon‐embedded mesoporous transition multimetal oxide nanospheres for long‐lasting hybrid cells

Arbaz

Ramulu

Jin

et al. 2022

Intl J of Energy Research

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Recently, multiple transition metal oxide-based materials have been intensely attracted in the field of energy storage owing to their multifunctional properties. Meanwhile, carbon-based materials are considered more reliable electrode candidates due to their high porosity and chemical stability. Herein, we synthesized carbon-embedded transition multimetal oxides as a hybrid composite by a facile hydrothermal method, followed by annealing in inert medium. The effect of different metal ion species (Ni, Co, and Ce) and their combination on the energy storage performance was explored. The carbon-embedded Ni-Co-Ce-Si (C/NiCoCeSi) oxide electrode revealed a higher areal capacity of 35.5 μAh/cm 2 at a current density of 3 mA/cm 2 than the C/NiSi oxide and C/NiCoSi oxide electrodes due to the improved redox chemistry. Moreover, the C/NiCoCeSi oxide electrode was subjected to a test involving 10 000 chargedischarge cycles at 7 mA/cm 2 , and it demonstrated the decent capacity retention of 83.8%. Furthermore, the C/NiCoCeSi oxide material was used as a positive electrode in the fabrication of a hybrid cell (HC). The as-fabricated HC demonstrated a good areal capacitance of 105.9 mF/cm 2 at 1.5 mA/cm 2 with maximum energy and power densities of 29.2 μWh/cm 2 and 6350 μW/cm 2 , respectively. Finally, the HC also powered light-emitting diodes to test its practical functionality.

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Morphology-dependent NiMoO4/carbon composites for high performance supercapacitors

Cited by 91 publications

References 44 publications

Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

Treatment of NiMoO4/nanographite nanocomposite electrodes using flexible graphite substrate for aqueous hybrid supercapacitors

Alginate Biopolymer Effect on the Electrodeposition of Manganese Dioxide on Electrodes for Supercapacitors

Carbon‐embedded mesoporous transition multimetal oxide nanospheres for long‐lasting hybrid cells

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