High-performance aqueous polysulfide-iodide flow battery realized by an efficient bifunctional catalyst based on copper sulfide

Qin, Yang; Li, X.; Liu, W.; Lei, Xiaodong

doi:10.1016/j.mtener.2021.100746

Cited by 16 publications

(15 citation statements)

References 36 publications

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“…00-023-0958). XRD results for the two samples at 220 and 250 • C matched very well with the reported data of roxbyite [37,38]. Obviously, the higher reaction temperature favored the phase transformation to the roxbyite phase, which perhaps was governed by the thermodynamic process.…”

Section: Structural Studiessupporting

confidence: 85%

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

et al. 2021

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In this paper, spherical-shaped pure phase djurleite (Cu31S16) and roxbyite (Cu7S4) nanoparticles were prepared by a solvothermal decomposition of copper(II) dithiocarbamate complex in dodecanthiol (DDT). The reaction temperature was used to control the phases of the samples, which were represented as Cu31S16 (120 °C), Cu31S16 (150 °C), Cu7S4 (220 °C), and Cu7S4 (250 °C) and were characterized by using X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), and absorption spectroscopy. The samples were used as photocatalysts for the degradation of tetracycline (TC) under visible light irradiation. The results of the study showed that Cu7S4 (250 °C) exhibited the best activity in the reaction system with the TC degradation rate of up to 99% within 120 min of light exposure, while the Cu31S16 (120 °C) system was only 46.5% at the same reaction condition. In general, roxbyite Cu7S4 (250 °C) could be considered as a potential catalyst for the degradation of TC in solution.

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Section: Structural Studiessupporting

confidence: 85%

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

et al. 2021

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“…Lei et al have successfully constructed a high-efficiency Cu 7 S 4 /CNT bifunctional catalyst to boost both PS and I − /I 3 − redox. 87 This well-designed work realizes the expectation to shorten the reaction rate between anolyte and catholyte.…”

Section: Strategies For S-based Aqueous Batteriesmentioning

confidence: 82%

“…The catalytic host is another requisite to overcome the large overpotential of S–S-type SABs and accelerate the L–L-type SABs. Different from the catalysts in SOBs, SABs frequently adopted Co-based (CoS, CoS 2 ), Cu-based (CuS, Cu 7 S 4 ), Ni-based (NiS, NiS 2 ), and Fe-based (FeS, FeS 2 ) catalysts. , Thereinto, Co-/Cu-based catalysts exhibited superior performances. For example, a CoS catalytic substrate (with electronic conductivity of 5.25 × 10 –6 S cm –1 ) is able to reduce 95% impedance compared with the pure stainless steel substrate .…”

Section: Strategies For S-based Aqueous Batteriesmentioning

confidence: 99%

“…Aside from the Co-based one, Cu-based catalysts also present satisfactory polarization reduction with lower prices. Lei et al have successfully constructed a high-efficiency Cu 7 S 4 /CNT bifunctional catalyst to boost both PS and I – /I 3 – redox . This well-designed work realizes the expectation to shorten the reaction rate between anolyte and catholyte.…”

Section: Strategies For S-based Aqueous Batteriesmentioning

confidence: 99%

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Sulfur-Based Aqueous Batteries: Electrochemistry and Strategies

et al. 2021

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While research interest in aqueous batteries has surged due to their intrinsic low cost and high safety, the practical application is plagued by the restrictive capacity (less than 600 mAh g −1 ) of electrode materials. Sulfur-based aqueous batteries (SABs) feature high theoretical capacity (1672 mAh g −1 ), compatible potential, and affordable cost, arousing ever-increasing attention and intense efforts. Nonetheless, the underlying electrochemistry of SABs remains unclear, including complicated thermodynamic evolution and insufficient kinetics metrics. Consequently, multifarious irreversible reactions in various application systems imply the systematic complexity of SABs. Herein, rather than simply compiling recent progress, this Perspective aims to construct a theory-to-application methodology. Theoretically, attention has been paid to a critical appraisal of the aqueous-S-related electrochemistry, including fundamental properties evaluation, kinetics metrics with transient and steady-state analyses, and thermodynamic equilibrium and evolution. To put it into practice, current challenges and promising strategies are synergistically proposed. Practically, the above efforts are employed to evaluate and develop the device-scale applications, scilicet flow-SABs, oxide-SABs, and metal-SABs. Last, chemical and engineering insights are rendered collectively for the future development of high-energy SABs.

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“…This 1.2 eV peak separation was identical to the sulfide phases of S in Cu 2 S NPs. , As the NPs underwent self-assembly for 2 h, Cu 2p 1/2 at 953.9 eV, Cu 2p 3/2 at 933.9 eV, and small satellite peaks emerged at the Cu 2p region (green curve), which originated from Cu (II) . The S 2p data showed that the S 2p 1/2 and 2p 2/3 peaks at 163.8 and 162.7 eV appeared, which were assigned to S 2– species in roxbyite (Cu 7 S 4 ) phase. , After further self-assembly, the intensity of Cu (II) 2p and S 2p peaks increased (blue curve), which represented a gradual phase transition by the oxidation of Cu (I) to Cu(II), indicating the Cu 2– x S phase of the NFs.…”

Section: Resultsmentioning

confidence: 62%

Broad Chiroptical Activity from Ultraviolet to Short-Wave Infrared by Chirality Transfer from Molecular to Micrometer Scale

et al. 2021

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Chiral nanomaterials provide a rich platform for versatile applications. Tuning the wavelength of polarization rotation maxima in the broad range including short-wave infrared (SWIR) is a promising candidate for infrared neural stimulation, imaging, and nanothermometry. However, the majority of previously developed chiral nanomaterials reveal the optical activity in a relatively shorter wavelength range (ultraviolet−visible, UV−vis), not in SWIR. Here, we demonstrate a versatile method to synthesize chiral copper sulfides using cysteine, as the stabilizer, and transferring the chirality from molecular-to the microscale through self-assembly. The assembled structures show broad chiroptical activity in the UV− vis-NIR-SWIR region (200−2500 nm). Importantly, we can tune the chiroptical activity by simply changing the reaction conditions. This approach can be extended to materials platforms for developing next-generation optical devices, metamaterials, telecommunications, and asymmetric catalysts.

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High-performance aqueous polysulfide-iodide flow battery realized by an efficient bifunctional catalyst based on copper sulfide

Cited by 16 publications

References 36 publications

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

Photocatalytic Degradation of Tetracycline in Aqueous Solution Using Copper Sulfide Nanoparticles

Sulfur-Based Aqueous Batteries: Electrochemistry and Strategies

Broad Chiroptical Activity from Ultraviolet to Short-Wave Infrared by Chirality Transfer from Molecular to Micrometer Scale

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