Surface modification of metal phosphate Binder-Free electrode with metal hydroxides for supercapattery

Aris, Fara M; Pershaanaa, M.; Gunalan, Surender; Bashir, Shahid; Omar, Fatin Saiha; Saidi, Norshahirah M.; Ramesh, K.; Ramesh, S.

doi:10.1016/j.flatc.2023.100504

Cited by 6 publications

(4 citation statements)

References 73 publications

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“…In this respect, the coating of pseudo-capacitive oxide, MnO 2−x containing oxygen vacancies, by CoS has been shown to yield a core-shell highly conductive structure, which exhibits in a supercapattery device with an aqueous electrolyte a high energy density of 34.72 Wh/kg at 597.24 W/ kg [ 57 ]. In addition to the coating technique, the surface modification (such as deposition of Co(OH) 2 on the well-known cobalt phosphate) has a positive impact on the supercapattery performance [ 58 ]. Another approach includes the formation of composites between cobalt sulfide and cobalt phosphate, where a synergistic effect achieves a high energy density of 34.68 Wh/kg at a remarkable power of 13,600 W/kg [ 59 ].…”

Section: Resultsmentioning

confidence: 99%

Lithium Manganese Sulfates as a New Class of Supercapattery Materials at Elevated Temperatures

et al. 2023

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To make supercapattery devices feasible, there is an urgent need to find electrode materials that exhibit a hybrid mechanism of energy storage. Herein, we provide a first report on the capability of lithium manganese sulfates to be used as supercapattery materials at elevated temperatures. Two compositions are studied: monoclinic Li2Mn(SO4)2 and orthorhombic Li2Mn2(SO4)3, which are prepared by a freeze-drying method followed by heat treatment at 500 °C. The electrochemical performance of sulfate electrodes is evaluated in lithium-ion cells using two types of electrolytes: conventional carbonate-based electrolytes and ionic liquid IL ones. The electrochemical measurements are carried out in the temperature range of 20–60 °C. The stability of sulfate electrodes after cycling is monitored by in-situ Raman spectroscopy and ex-situ XRD and TEM analysis. It is found that sulfate salts store Li+ by a hybrid mechanism that depends on the kind of electrolyte used and the recording temperature. Li2Mn(SO4)2 outperforms Li2Mn2(SO4)3 and displays excellent electrochemical properties at elevated temperatures: at 60 °C, the energy density reaches 280 Wh/kg at a power density of 11,000 W/kg. During cell cycling, there is a transformation of the Li-rich salt, Li2Mn(SO4)2, into a defective Li-poor one, Li2Mn2(SO4)3, which appears to be responsible for the improved storage properties. The data reveals that Li2Mn(SO4)2 is a prospective candidate for supercapacitor electrode materials at elevated temperatures.

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Section: Resultsmentioning

confidence: 99%

Lithium Manganese Sulfates as a New Class of Supercapattery Materials at Elevated Temperatures

et al. 2023

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“…MOFs also have remarkable stability and can sustain repeated charge−discharge cycles without degrading. 21 This high cycle stability improves the longevity and dependability of SCs made from MOF-derived material for electrodes, making them suitable for long-term energy storage device uses. 32,33 In this work, we synthesized Co-MOF, ZnS, and Co-MOF/ ZnS for SCs by utilizing a hydrothermal process.…”

Section: Introductionmentioning

confidence: 98%

“…MOFs can transport ions more effectively due to their unique structure. MOFs’ electrochemical characteristics improve as their surface area increases. , The MOFs’ large permeability allows for many ion absorption sites, which improves the SC capacitance. MOFs also have remarkable stability and can sustain repeated charge–discharge cycles without degrading .…”

Section: Introductionmentioning

confidence: 99%

“…MOFs’ electrochemical characteristics improve as their surface area increases. , The MOFs’ large permeability allows for many ion absorption sites, which improves the SC capacitance. MOFs also have remarkable stability and can sustain repeated charge–discharge cycles without degrading . This high cycle stability improves the longevity and dependability of SCs made from MOF-derived material for electrodes, making them suitable for long-term energy storage device uses. , …”

Section: Introductionmentioning

confidence: 99%

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Synergistic Co-MOF/ZnS Composite: Advancing Supercapattery Performance and Catalyzing Hydrogen Evolution Reaction

Raffah,

Hassan,

Iqbal

et al. 2024

Energy Fuels

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Novel electrode development is crucial in the hunt for long-term energy storage options. In this work, we describe a promising advanced energy storage system with the fabrication of a cobalt metal organic framework doped with zinc sulfide (Co-MOF/ZnS) as an electrode and applied to energy storage and hydrogen evolution reaction (HER) applications. The Brunauer− Emmett−Teller (BET) method showed a 65.32 m 2 /g surface area for Co-MOF/ZnS. The Co-MOF/ZnS electrode has an outstanding capacity of 1615 C/g in a three-electrode setup. Furthermore, when paired with activated carbon (AC) in a supercapattery, this device exhibits a remarkable energy density of 59.33 W h/kg and a power density of 812 W/kg. The cycling stability of the Co-MOF/ZnS//AC supercapattery is evaluated by subjecting it to 10,000 cycles. The Co-MOF/ZnS//AC supercapattery test is carried out shortly after the stability test, and it retains 98% of its original capacity while maintaining a high Coulombic efficiency of 87%. In the HER test, Co-MOF/ZnS exhibits an outstanding overpotential of 434 mV.

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Performance comparison of 2D nickel phosphate nanoparticles prepared via sonochemical and microwave-assisted hydrothermal routes for supercapattery

Saidi,

Khairudin,

et al. 2023

Journal of Energy Storage

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Surface modification of metal phosphate Binder-Free electrode with metal hydroxides for supercapattery

Cited by 6 publications

References 73 publications

Lithium Manganese Sulfates as a New Class of Supercapattery Materials at Elevated Temperatures

Lithium Manganese Sulfates as a New Class of Supercapattery Materials at Elevated Temperatures

Synergistic Co-MOF/ZnS Composite: Advancing Supercapattery Performance and Catalyzing Hydrogen Evolution Reaction

Performance comparison of 2D nickel phosphate nanoparticles prepared via sonochemical and microwave-assisted hydrothermal routes for supercapattery

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