Lithium‐Sulfur Batteries: Stabilization of Insoluble Discharge Products by Facile Aniline Modification for High Performance Li‐S Batteries (Adv. Energy Mater. 14/2015)

Abstract

In article number 1500268, Seung Jae Yang, Chong Rae Park, and co‐workers report the introduction of aniline functional groups onto the surface of ordered mesoporous carbon by facile diazotization. The aniline functional groups provide interactive sites for insoluble discharge products, thereby enabling a high‐performance lithium sulfur battery.

Enhanced Li–S Batteries Using Amine-Functionalized Carbon Nanotubes in the Cathode

“…The Raman spectra of the composite also provide information about the interaction between elemental sulfur and the CNT-PEI composite (Figure and Table ). The intensity ratio between the D band ( I D ) and the G band ( I G ) is indicative of a basic structural change in the CNTs, with a greater value of this parameter implying more defects. , Upon sulfur loading onto the CNT composite, an increase in the I D / I G ratio is observed, indicating an increase of sp 3 carbons on the nanotubes, which implies that sulfur interrupts the CC sp 2 bond in CNTs. Thus, both XPS and Raman spectra verified that sulfur is anchored to the composite via strong chemical interaction.…”

“…In a conventional Li–S battery, a high initial capacity loss is typically observed due to the dissolution of LiPS. Once in the electrolyte, the LiPS cannot be fully recovered in the following charge process, which leads to poor utiliztion of the active electrode material and capacity fading. ,, In lithium–sulfur cells employing CNT-PEI/S composites, it is apparent that very stable performance is observed, even at 70% sulfur content. These performance improvements evidently stem from PEI’s role in effectively preventing LiPS dissolution and the intrinsic improvements in cathode conductivity stemming from the CNT substrate.…”

Porous Inorganic Membranes for CO2 Capture: Present and Prospects

“…Unlike nontemplated mesoporous membranes, mesostructured membranes exhibit improved structural stability (e.g., no grain growth or phase transformations), well-controlled pore sizes and pore order (dictated by the choice of the surfactant and the synthesis conditions), high surface areas, and chemically tunable pore walls. Most of the reported studies focus on the synthesis of 3D cubic silica membranes (e.g., MCM-48), either by hydrothermal treatment − or the EISA method, , without spatial restrictions against permeation. Further insights into the synthesis and structural properties of mesostructured silica membranes can be found in the review paper of Kumar and Guliants .…”

Preparation of aqueous sol–gel silica and titania multi-layered thin films and their evaluation as biomolecular encapsulation hosts

“…One particular area of development is related to thin lm (<1 mm) preparation due to their interest in biosensor design. 24 One challenge is to prepare crack-free layers, via the incorporation of hydrophilic molecules, 25 the mesostructuration of the layer 26 or via layer-by-layer deposition. 27 Another issue is related to the low amount of active molecules or cells that can be incorporated in a single layer.…”