Microemulsion Assisted Assembly of 3D Porous S/Graphene@g‐C₃N₄ Hybrid Sponge as Free‐Standing Cathodes for High Energy Density Li–S Batteries

Abstract

A 3D porous sulfur/graphene@g‐C3N4 (S/GCN) hybrid sponge, which can be directly applied as a free‐standing cathode for Li–S batteries, is realized via a microemulsion assisted assembly approach. In this strategy, the interior oil emulsion droplets serve as soft templates to form pores to accommodate sulfur and the hydrophilic GCN stacks around oil droplets to assemble into a crosslinked 3D network. Through this microemulsion encapsulation route, S/GCN cathodes with a sulfur loading as high as 82 wt% can be achieved. Furthermore, the enriched N‐sites in GCN macropores offer numerous adhesion sites for polysulfides, realizing a “physical‐chemical” dual‐confinement for polysulfides from diffusion. Moreover, the robust and highly porous 3D graphene frameworks render efficient electron/Li+ transport pathways for fast kinetics as well as good structure integrity. Consequently, in comparison to the conventional G‐sponge/Li2Sn catholyte system, S/GCN delivers a higher specific capacity, superior high‐rate capability (612 mA h g−1 at 10 C), and alleviated anode corrosion issues. Particularly, an energy density as high as 1493 W h kg−1 (calculated on the total weight of the cathode) and an extremely low capacity fading rate of 0.017% per cycle over 800 cycles at 0.3 C are achieved.

Impact of Glutathione Modulation on Stability and Pharmacokinetic Profile of Redox‐Sensitive Nanogels

“…Thus, the caveolae-and clathrin-mediated endocytosis and passive uptake present the major pathways for cellular entry of the disulphide crosslinked nanogels. Importantly, only marginal uptake was observed for GSH-degraded small prepolymers (≈3-5 nm), whose radius lies below the minimum threshold for endocytosis [28,29] (Figure S1, Supporting Information). Hence, the structure maintenance and size of the nanogels are essential for internalization.…”

Rational Fabrication of Nitrogen and Sulfur Codoped Carbon Nanotubes/MoS2 for High‐Performance Lithium–Sulfur Batteries

“…[4] The insulating property of sulfur and its discharge products (Li 2 S 2 /Li 2 S) seriously inhibitst he electrode reactionk inetics, sulfur utilization, and cycle life of Li-S batteries. [5] To address this issue, as ignificant number of efforts have been devoted to the fabrication of innovatives tructures. [6] The primarys trategy is to couple sulfur with appropriate anchors or hosts.…”

Real‐Time Detection of Nanoparticles Interaction with Lipid Membranes Using an Integrated Acoustical and Electrical Multimode Biosensor

“…These results are in accord ance with the fact that large AuNPs prefer to enter into cells through pathways of energydependent endocytosis instead of direct penetration through the cell membrane. [43] The corre sponding FET responses are illustrated in Figure 4b,d,f. Ion current (ΔI) curves for the three kinds of AuNPs all decrease to a lower value, which is ascribed to the effects of counter ion release in the particles-membrane interaction.…”