Mobile phone battery charged more than a week, 15 minutes per charge. Northwestern University researchers gave us away from this dream one step further. According to the American physicist hp pavilion zd7000 battery organizational networks reported on November 15, the school’s engineers developed an electrode for lithium-ion battery, allowing the battery to maintain 10 times higher than the existing technology of electricity, but will also make the battery with a new electrode charge rate increased by 10 times. Research report published recently in the “Advanced Energy Materials” magazine.
Storage capacity and charging rate are two major hp probook 6440b battery limitations of the battery. Storage capacity is limited by the charge density, that is, the battery terminals can accommodate the number of lithium ions. Charge rate is limited by the negative lithium ions from the electrolyte to reach the speed. Existing lithium anode made of carbon-based layers of graphene sheets stacked together, a lithium atom can only fit six carbon atoms. In order to increase storage capacity, scientists have tried to use silicon instead of carbon, silicon can be adapted to allow more lithium to achieve the four lithium atoms corresponding to a silicon atom. However, the silicon in the process of charging significantly expand and shrink, causing the charge capacity of the hp probook 4411s battery fast break and lost. The shape of the graphene film battery charging rate will be constrained, although they have only one carbon atom thick, but very long. Since moving to the graphene sheets of lithium middle takes a long time, ion “traffic jam” in the case of graphene edges have occurred.
Now, the research team combined two techniques to solve the above problems. First, to stabilize the silicon in order to maintain maximum charge capacity, they are inserted between the graphene sheets of silicon clusters, the use of the sony vgp-bps9/s battery flexibility of graphene sheets with battery changes in the number of silicon atoms, making a large number of lithium atoms stored in the electrode. Silicon clusters can add a higher energy density, but also can reduce the expansion due to silicon and reduce losses caused by the charge capacity, best of both worlds.
The team also used chemical oxidation processes in graphene sheets to create a 10 nm to 20 nm pores, called “surface defects”, so this shortcut along the lithium ion will reach the anode and react with silicon, is stored in the negative . This will shorten the battery’s charge time to 10 times. Harold H papers lead author, said the new technology allows lithium-ion rechargeable battery 10 times longer life, even after 150 charge, the battery energy efficiency of existing lithium-ion battery is still five times. This technology is expected in the next sony vgp-bps13 battery three to five years to enter the market.
Graphene came less than a decade, not only to help two of its inventors won the Nobel Prize, and rapid access to a variety of applications, such as battery electrodes. The success of American Scientists try new techniques, has greatly improved the performance of graphene to help lithium-ion battery that has long been a key component used in everyday appliances, breaking the long-lingering bottlenecks in energy density. This indicates that even the new generation of energy storage system – charging time shorter times, storage increased tenfold, to lithium batteries to power the universal laptop AC adapter ideal and perfect step. If a similar principle of a new battery installed in the car as soon as possible, the largest electric vehicle to market the crux or will be resolved.