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According to foreign media reports, it is crucial to improve the battery capacity, which will help improve the range of electric vehicles. For this reason, many scientific research institutions focus on lithium oxygen batteries.

Prospects: Lithium oxygen battery is a promising product development path. Compared with traditional lithium ion battery, it may greatly improve its energy density (at least theoretically feasible). The research and development personnel of the University of Waterloo in Canada have adopted a number of ways to solve many technical problems and are expected to carry out the commercial operation of this type of battery.

Challenge: At present, there is a key problem - when the lithium oxygen battery is discharged, oxygen will be converted into superoxide and lithium peroxide successively. With the extension of time, such reaction products will corrode the battery components, thereby limiting the battery's charging capacity and battery practicability.

Technical progress: In order to solve the above problems, the R&D personnel replaced the graphite cathode with a nickel oxide cathode and matched it with a stainless steel mesh. The R&D personnel also added molten salt to the electrolyte to promote the movement of positive ions between positive and negative electrodes, and at the same time, raised the maximum operating problem of this type of battery to 150 ℃.

The above methods are expected to increase the charging and discharging times of lithium oxygen batteries by three times, and the researchers also try to increase the energy per unit of mass by more than 50%.

The MIT researcher wrote in the note: "This research discovery provides an infinite opportunity. The new battery technology makes lithium oxygen battery hopeful to defeat lithium ion battery and other energy storage technologies."

Although the direction of research is clear, it will be several years at least. In addition, it is necessary to further improve the service life of such batteries, so as to enhance their product competitiveness.

However, researcher Linda Nazar said that it may take more than 15 years to realize the commercial promotion of lithium oxygen battery.

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