Sentences with phrase «carbon electrode materials»

Not exact matches

In fact, there have been many efforts to improve lithium - ion battery or supercapacitor performance using alternative electrode materials such as carbon nanotubes and other manganese oxides.

Then they applied the carbon to the surface of electrode materials used in supercapacitors, devices that store and deliver energy more quickly and more powerfully than a typical battery.

The porous carbon performed better as conductive electrode material than conventional carbon sources, often heat - treated coconut shells, coal or wood.

But in a paper posted online today in Nature Nanotechnology, the MIT team, led by materials scientist Yang Shao - Horn, took a very different approach: using carbon nanotubes to replace the oxide - based positive electrode.

This illustration shows a battery electrode made of lithium iron phosphate (left side of image) coated with carbon, and in contact with an electrolyte material.

But the new analysis shows that the critical interface is actually between two solid materials: the electrode itself, and a carbon coating used to improve its performance.

The researchers became the first to design a ferroelectric junction with electrodes made of graphene, a carbon material only one atom thick.

Dr. Rosso's current projects include the following: (1) characterizing the kinetics and mechanisms of elementary charge and ion transport processes in redox transformation of iron oxide minerals, (2) predicting molecular - scale electron transfer kinetics in microbially - mediated reduction of bioavailable iron in subsurface environments, (3) studying mechanisms of heterogeneous reduction of contaminant U (VI) and Tc (VII) by Fe (II)- bearing minerals, (4) simulation of coupled charge and ion transport in transition metal oxide electrodes for advanced materials applications, (5) probing mechanisms and kinetics of mineral transformation to metal carbonates for geological carbon sequestration, and (6) studying mechanisms of uptake and retention of uranium in sediments.

The carbon / titanium material greatly improves the ion's ability to move in the electrode to provide a high capacity at high charge / discharge rate.

The researchers» new material, titanium dioxide crystals attached to a thin carbon sheet called graphene, is incorporated into the battery's negative electrode.