A molecular dynamics study of the binding effectiveness between undoped conjugated polymer binders and tetra-sulfides in lithium–sulfur batteries

“…To address these issues, especially to suppress the shuttling of lithium polysulfides (LiPSs), abundant methods − have been made, which can be classified as physical confinement, chemical adsorption, and catalysis. − Various composite materials − have been applied as sulfur hosts, such as carbon materials, − polymers, , metal oxides, , metal nitrides, metal sulfides, , metal phosphides, , etc. Among them, different carbon materials ,− are the most widely researched because of their superior electroconductibility and high surface areas.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Catalytic Conversion of Polysulfides by Hollow Bimetallic Oxide-Based Heterostructure Nanocages for Lithium-Sulfur Batteries

Li¹,

Kong²,

Zhou³

et al. 2021

ACS Sustainable Chem. Eng.

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Performance improvement of lithium-sulfur batteries (LSBs) is restricted by the dissolution and shuttle of lithium polysulfides (LiPSs). Prussian blue analogs (PBAs) and their derived nanomaterials are ideal sulfur-fixing materials owing to their abilities to anchor LiPSs, accelerate redox conversion, and smooth Li2S precipitation. Herein, the hollow Co x Fe3–x O4 heterostructure nanocages with highly interconnected pore architecture obtained by a PBA-assisted strategy are synthesized to overcome the abovementioned obstructions of LSBs. It is found that the bimetallic oxide-based heterostructure can not only inhibit LiPS diffusion via forming metal–sulfur bonds but also accelerate the LiPS conversion kinetics. Meanwhile, the hollow porous structure contributes to the physical confinement of LiPSs and acts as a buffer for the volume change. Thereby, the rate capability and cycling stability of hollow Co x Fe3–x O4@S composite electrodes have been improved significantly. As a result, the hollow Co x Fe3–x O4@S cell displays an excellent initial capacity of 1301.6 mAh g–1 at a current density of 200 mA g–1. Even at 1 A g–1, it exhibits an outstanding initial capacity of 898.9 mAh g–1 with a negligible capacity loss rate, which is only 0.106% per cycle after 500 cycles. This work provides a new perspective for the construction and design of multifunctional hollow heterostructure materials for more efficient and stable LSBs.

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3D DNAzyme Motor Nanodevice With Self‐Powered FRET Amplifier and Self‐Supplied H₂O₂ for Enhancing Human Neutrophil Elastase Profiling and Chemodynamic Therapy in Lung Tumor

Du,

Xu,

et al. 2024

Advanced Science

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The development of theragnostic nanosystems integrating FRET (fluorescence resonance energy transfer) imaging and chemodynamic therapy (CDT) for accurate diagnosis and effective treatment of lung tumors is still a big challenge. Herein, a peptide‐assembled 3D DNAzyme motor nanodevice is engineered for a self‐powered FRET amplifier profiling human neutrophil elastase (HNE) and self‐supplied H2O2 enhancing CDT. The nanodevice is prepared by depositing AuNPs on ZIF‐8, in which ZIF‐8 co‐loaded the lysosomal targeting peptide‐modified copper peroxides (PCPs) and hairpins (H1, H2, and H3), AuNPs are co‐labeled by DNAzyme‐peptide (DP) conjugate and H3. In the tumor micro‐environment, HNE driven 3D DNAzyme walker followed by an exponential amplification constructed by a synergistic cross‐activation between hybridization chain reaction and DNAzyme, generating a self‐powered FRET amplifier. The FRET amplifier specifically measures HNE with a sensitivity of 0.026 pM, and successfully images exogenous HNE in living cells and monitors HNE in mouse models. Moreover, the PCPs can target lysosomes, reducing lysosome escape. The self‐supplying H2O2 undertaken by PCPs improves the Cu (II)‐catalyzed Fenton‐like reaction, effectively causing cell apoptosis to inhibit tumor growth. Significantly, the nanodevice successfully screens inhibitors and discriminates the HNE level in normal and lung cancer tissues, suggesting that the nanodevice provides an effective tool for the diagnosis and treatment of lung tumors.

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A molecular dynamics study of the binding effectiveness between undoped conjugated polymer binders and tetra-sulfides in lithium–sulfur batteries

Cited by 12 publications

References 82 publications

Trace amounts of palladium catalysed the Suzuki–Miyaura reaction of deactivated and hindered aryl chlorides

Trace amounts of palladium catalysed the Suzuki–Miyaura reaction of deactivated and hindered aryl chlorides

Enhancing Catalytic Conversion of Polysulfides by Hollow Bimetallic Oxide-Based Heterostructure Nanocages for Lithium-Sulfur Batteries

3D DNAzyme Motor Nanodevice With Self‐Powered FRET Amplifier and Self‐Supplied H₂O₂ for Enhancing Human Neutrophil Elastase Profiling and Chemodynamic Therapy in Lung Tumor

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A molecular dynamics study of the binding effectiveness between undoped conjugated polymer binders and tetra-sulfides in lithium–sulfur batteries

Cited by 12 publications

References 82 publications

Trace amounts of palladium catalysed the Suzuki–Miyaura reaction of deactivated and hindered aryl chlorides

Trace amounts of palladium catalysed the Suzuki–Miyaura reaction of deactivated and hindered aryl chlorides

Enhancing Catalytic Conversion of Polysulfides by Hollow Bimetallic Oxide-Based Heterostructure Nanocages for Lithium-Sulfur Batteries

3D DNAzyme Motor Nanodevice With Self‐Powered FRET Amplifier and Self‐Supplied H2O2 for Enhancing Human Neutrophil Elastase Profiling and Chemodynamic Therapy in Lung Tumor

Contact Info

Product

Resources

About

3D DNAzyme Motor Nanodevice With Self‐Powered FRET Amplifier and Self‐Supplied H₂O₂ for Enhancing Human Neutrophil Elastase Profiling and Chemodynamic Therapy in Lung Tumor