Application of octanohydroxamic acid for liquid-liquid extraction of manganese oxides and fabrication of supercapacitor electrodes

Milne, J.; Zhitomirsky, Igor

doi:10.1016/j.jcis.2018.01.021

Cited by 32 publications

(33 citation statements)

References 57 publications

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“…9). Note that a similar capacity loss for Li//-MnO2 cells was reported in several works [28,[66][67][68] [66] reported a 1 st IC larger than 40 mAh g-1 for α-MnO2 nanowires. Covering α-MnO2 nanorods by a thin layer of carbon improves the long-term capacity retention, but does not inhibit the initial capacity loss that confirms the trapping of a fraction of lithium ions into the internal cavities during the cell formation [27].…”

Section: Electrochemical Behaviorsupporting

confidence: 84%

“…A recent example is provided by the synthesis of nanosheet-based MnO2 hollow capsules, which delivered a capacity of 1182.9 mAh g -1 for the initial cycle and 198.4 mAh g -1 after 500 cycles [21]. Numerous methods to synthesize MnO2 include sol-gel [22], hydrothermal methods [23][24][25], refluxing method [26] and wet-chemical methods [27][28][29][30][31]. For most of them, strong mixing, long time and high temperature are required, resulting in the waste of a lot of energy [32,33].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical performance of nanosized MnO2 synthesized by redox route using biological reducing agents

Abuzeid

Hashem

Kaus

et al. 2018

Journal of Alloys and Compounds

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For more than a century, manganese dioxides (MDOs) have been used as electrochemically active materials in energy storage and conversion applications. To reduce the cost and hazardous impact of synthesis, a redox method was used to prepare MnO2 using extracts of green (GT-MnO2) and black (BT-MnO2) tea as biological reducing agents. Polyphenols present in the extracts of tea not only reduce Mn 7+ ions but also act as "capping agents" to stabilize and prevent the produced MnO2 nanoparticles from degradation and aggregation. Elemental, structural properties and morphology of nanosized α-KxMnO2 were studied by thermogravimetric analysis, X-ray powder diffraction and Raman spectroscopy, which revealed the different crystallinity between GT-MnO2 and BT-MnO2 due to the strength of the antioxidant species. Electrochemical investigations highlight the beneficial presence of K + ions in (2×2) tunnels; with a higher concentration, α-K0.135MnO2 exhibits a discharge specific capacity of 155 mAh g-1 after 20 cycles at C/26 rate.

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Section: Electrochemical Behaviorsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of nanosized MnO2 synthesized by redox route using biological reducing agents

Abuzeid

Hashem

Kaus

et al. 2018

Journal of Alloys and Compounds

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“…Following the addition of acetonitrile/6 N HCl (90/10, v/v), samples were incubated at 100 °C for 45 min. Finally, liquid–liquid extraction 42 with ethyl acetate was performed and the reconstituted samples were injected into an optimized LC/MS/MS system. The relative abundance of each fatty acid was quantified by gas chromatography.…”

Section: Methodsmentioning

confidence: 99%

Elovl6 regulates mechanical damage-induced keratinocyte death and skin inflammation

et al. 2018

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Mechanical damage on the skin not only affects barrier function but also induces various immune responses, which trigger or exacerbate skin inflammation. However, how mechanical damage-induced skin inflammation is regulated remains incompletely understood. Here, we show that keratinocytes express the long-chain fatty-acid elongase Elovl6. Mice deficient in Elovl6 showed higher levels of cis-vaccenic acid (CVA) in the epidermis and severe skin inflammation induced by mechanical damage due to tape stripping than did wild-type mice. CVA accelerated tape stripping-triggered keratinocyte death and release of danger-associated molecular patterns (DAMPs) such as high-mobility group box 1 protein (HMGB-1) and IL-1α, which induced production of proinflammatory cytokines and chemokines IL-1β and CXCL-1 by keratinocytes. Our results demonstrate that Elovl6 regulates mechanical damage—triggered keratinocyte death and the subsequent dermatitis.

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“…Various liquid–liquid extraction strategies have been developed for the surface modification and agglomerate‐free processing of MnO 2 and Mn 3 O 4 particles. [ 50,51 ] One of the difficulties of the wet chemical nanotechnology is nanoparticle removal from the synthesis medium and their transfer to the device processing medium. [ 88 ] The condensation of OH groups on the particle surface and formation of oxo‐bridges often results in the agglomeration of oxide particles during the drying stage.…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

“…Bottom‐up and top‐down strategies have been developed for liquid–liquid extraction. [ 88 ] Different extractor molecules were used for manganese oxides, such as lauryl gallate, [ 64 ] octanohydroxamic acid, [ 51 ] hydroxamic acid derivatives, [ 89 ] phosphonic acids, [ 54 ] and other extractors. [ 52,56 ] The use of lauryl gallate [ 64 ] allowed the fabrication of composites with a specific capacitance as high as 8 F cm −2 .…”

Section: Manganese Oxides and Compositesmentioning

confidence: 99%

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

188

128

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Pseudocapacitive materials are used for supercapacitor applications due to their exceptionally high capacitance and low cost. Good capacitive performance of the pseudocapacitive materials at high active mass loadings is vital for the development of the next generation of supercapacitor devices. This review describes recent advances in materials and nanotechnologies, which allows the development of advanced pseudocapacitive devices with high active mass. An important breakthrough is the discovery of novel dispersing and capping agents for the colloidal processing of nanoparticles. Particularly important are novel co‐dispersants that exhibit enhanced adsorption on materials of different types, such as inorganic nanoparticles, carbon nanotubes, and graphene. Conceptually new strategies are designed to fabricate coated particles. Recent innovations pave the way for the development of multifunctional redox‐active dopants‐dispersants and dopants‐oxidants to manufacture conductive polymer composites. Among the most important advances in nanotechnology is the development of template methods and heterocoagulation techniques for composite manufacturing. The progress in the design of novel surface modification techniques and materials, discovery of advanced anchoring groups, and development of liquid–liquid extraction allows agglomerate‐free processing of nanomaterials and composites. This review describes fundamental aspects of novel technologies and their applications in the manufacturing of pseudocapacitive devices for energy storage.

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Application of octanohydroxamic acid for liquid-liquid extraction of manganese oxides and fabrication of supercapacitor electrodes

Cited by 32 publications

References 57 publications

Electrochemical performance of nanosized MnO2 synthesized by redox route using biological reducing agents

Electrochemical performance of nanosized MnO2 synthesized by redox route using biological reducing agents

Elovl6 regulates mechanical damage-induced keratinocyte death and skin inflammation

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

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