Graphene-sulfur composites with sulfur fractions as high as 87 wt% are prepared using a simple one-pot, scalable method. The graphene envelops the sulfur particles, providing a conductive shrink-wrap for electron transport. These materials are efficient cathodes for Li-S batteries, yielding 93% coulombic efficiency over 50 cycles with good capacity.

The electrochemical reduction of benzalacetone (BA) has been studied at mercury cathodes in N,N-dimethylformamide solutions by the techniques of cyclic voltammetry and controlled potential coulometry. The radical anion (BA'-) forms ion pairs with tetraethylammonium cations and then disappears in oligomerization processes. Atentative structureof the dimer BA BA"-... (C2H5)4N+is suggested on the ...

Li–CO2 Batteries In article number 2101390, Dong Liu, Chuangang Hu, Liming Dai and co–workers develop topological defect–rich graphene based materials as high–performance metal–free cathodes in batteries. The cathodes' sufficient effective active sites for CO2 reduction/evolution facilitate the formation/decomposition of Li2CO3 during discharging/charging process, resulting unprecedented batter...

New high-capacity intercalation cathodes of Li2V x Cr1-x O2F with a stable disordered rock salt host framework allow a high operating voltage up to 3.5 V, good rate performance (960 Wh kg-1 at ≈1 C), and cycling stability.

Mn(1.5)Co(1.5)O(4) spinel oxide as a cathode or one component of a composite cathode presents no visible reaction with an Y(2)O(3)-stabilized ZrO(2) electrolyte. The low electrode polarization resistances and good performance compared with traditional Sr-doped LaMnO(3)-YSZ composite cathodes imply promising application for the next generation of intermediate-temperature solid oxide fuel cells.

This review makes the case for cheaper and more efficient water electrolysis technology. In particular, the potential advantages of zero gap, alkaline water electrolysers based on hydroxide ion conducting membranes are highlighted. Following a brief introduction into the thermodynamics and kinetics of water electrolysis, recent developments in oxygen evolving anodes, hydrogen evolving cathodes ...

Inorganic-based solid-state lithium-sulfur batteries (SSLSBs) with high energy density and safety have attracted wide attention as they are one of the most promising storage devices to meet future market requirements. However, development SSLSBs faces various challenges due unreasonable structural design in sulfur cathodes. Carbon is indispensable components The rational carbon materials become...

Lithium-Sulfur (Li-S) batteries as the next-generation battery system have an ultrahigh theoretical energy density. However, limited conversion of polysulfides in sulfur cathodes deteriorates performance Li-S batteries. In this study, we develop a novel titanium nitride (TiN) catalyst for via atomic layer deposition (ALD). The synthesized ALD-TiN shows controllable ultrafine particle size (<2 n...

A series of single-crystal, Ni-rich Li[NixCoyMn1–x–y]O2 (NCM) cathodes (x = 0.7, 0.8, and 0.9) with particle diameters ?3 ?m are systematically compared polycrystalline corresponding Ni contents. Despite their high resistance to microcracking, the electrochemical performances single-crystal NCM cathodes, in terms capacity cycling stability, inferior those cathodes. In situ XRD TEM analyses reve...

Objective: In spinal cord stimulation, neurosurgeons increasingly tend to implant dual leads. Dual leads (longitudinal bipole/tripole) provide medio-lateral control over the recruited dorsal column (DC) area by steering the injected cathodal currents. However the DC recruited area is suboptimal when dual aligned leads straddling the midline programmed as longitudinal guarded cathodes (+-+) are ...