Capacity akkamulyatorov be 10 times more with sulfur

By combining the gray -coated carbon nanofibers empty and with electrolytic additives, researchers have developed a battery that exceeds the limitations of currently existing lithium-ion versions in terms of storage capacity.
These problems limit the use of new technologies such as electric vehicles ( though it has developed a test version elektomobilya with mileage 1630km ), and the storage of energy in power networks, as they do not save enough energy in relation to its size and weight. Because of their energy is too low. The solution is largely concerned with finding new materials for the positive and negative electrodes of batteries - cathodes and anodes.
Previously, engineers, led by Yi Cui - a professor of materials science and engineering at Stanford University have developed a new type of anodes with silicon nanowires. A new study published in the journal. Nano Letters. , Describes how Tsui is currently using. covered with a gray and empty carbon nanofibers, and electrolyte additives for improving the other component of lithium-ion battery - the cathode.
Cui said that the use of anodes with silicon nanowires and carbon -coated sulfur cathode in a battery - it is a design. a new generation of batteries. ... Sulfur is a material that can provide. 10 times more storage capacity charge. , While only about half the voltage of the existing batteries ...
And the power of the charge, and stress - affect how much the battery can store energy. Along with sulfur cathode in an integrated battery indicator allows you to charge the higher capacity to develop a battery of four to five times as energy intensive when compared with the existing technology of lithium- ion batteries.
For lithium- sulfur batteries have addressed through their low cost and lack of toxicity of the sulfur. However, the previous generation of lithium- sulfur cathodes are not suitable for commercial production as needed to re- charge and charge.
The new production of cathode solves a number of important questions, which, together, says Cui, ...
In the previous lithium- sulfur cathode structures, sulfur covered relatively open structure of the carbon that was problematic, because in this way the sulfur was available electrolyte solution batteries. When the intermediate reaction products - lithium polysulfides - came into contact with an electrolyte solution, they reduced the capacity of the battery, dissolving in the electrolyte.
...
The new version solves the conflict with the construction of a unique manufacturing process that allows the sulfur to cover the empty carbon nanofibers from within, not outside. This manufacturing process is based on a new application of commercially available filtering technology, which is used to filter water.
The new design of the cathode also increases the battery capacity, as it has an almost closed structure which prevents a significant source of polysulfides in the electrolyte solution. The length of the empty nanofibers is about 300 the size of their diameter, and long and narrow channels prevent the source of polysulfides.
In addition to the results achieved with an increase in energy consumption due to improved manufacturing process of carbon nanofibers coated with gray, a graduate student Yuan Yang has included an electrolyte additive that increases the battery and energoefektivnost - known as the Coulomb efficiency. ... In addition, you get 99, ...
... We now have a greater capacity on the part of both electrodes. And this is quite an interesting beginning ...