Is the future "super battery" far from reality?

　　1、 Overcoming the technical difficulties of super battery

　　Claire Gray, a chemistry professor at Cambridge University, and her team overcame the technical difficulties in the development of lithium air batteries. This battery enables electric vehicles to have a range comparable to gasoline and diesel vehicles without having to carry a large battery pack. If this technology can be converted from laboratory demonstration to commodity, the car can be driven from London to Edinburgh (about 650km away) with only one charge, but the cost and weight of the battery used is only one fifth of the lithium-ion battery used in current electric vehicles. How far is it from the laboratory to the highway? This is really exciting news.

　　2、 Existing batteries are the bottleneck of electric vehicles

　　It should be understood that battery life is the biggest obstacle restricting the development of electric vehicles. Electric cars that can't run far are hooligans. For a long time, the mileage anxiety that plagues electric vehicle owners makes it difficult for people to say "love you" to electric vehicles. In addition to expensive luxury brands, electric vehicles on the current market have a nominal mileage of 300 kilometers, which means that electric vehicles can only meet the driver's driving radius of 150 kilometers. Of course, this is only under the best conditions. If factors such as opening the air conditioner and frequent braking are considered, the actual mileage will be discounted. In addition, the average single charging time is at least two hours, which also makes rush car owners complain about electric vehicles. There is no doubt that if a company completes the subversion of electric vehicles, its innovation is likely to come from the core component battery. Compared with the lithium ion technology currently popular in rechargeable batteries, lithium air batteries can store more energy theoretically. Through advanced technology, Cambridge University constructed a highly porous and spongy carbon electrode using graphene, and then added some additives to maintain its chemical stability, thus solving the explosion problem of lithium air battery before.

　　3、 How far is the ideal of super battery from reality

　　At the same time, Cambridge University is also trying to make it run directly with the air without filtering the carbon dioxide, nitrogen and water in the air. But don't be too happy. If you really want to drive an electric car with this super battery, you may have to wait. How far is super battery from ideal to reality? Cambridge University said that it may take some time, perhaps ten years, to really mature and apply this technology to business. Why is there such a long way to go after the success of the experiment? The important performance indicators of automotive power lithium battery include specific energy, energy density, specific power, cycle life and cost. The head of a self owned brand new energy department explained that there are many development lines for lithium-ion batteries, and it will take several years to test and verify the safety, stability, service life and group technology of batteries. Among them, the most important time is the battery life test, which requires continuous charging and discharging of the battery to test its depletion. The person in charge said that the development trend of batteries is to develop towards higher energy density, that is, to carry more energy in a limited volume space. However, the higher the energy density, the higher the potential risk coefficient will increase. In addition, it takes two to three years to test the manufacturing feasibility in terms of production feasibility. As the battery moves from laboratory to production, there are high requirements for production equipment, process route and manufacturing environment during the manufacturing process, and the feasibility of manufacturing needs to be verified for a long time. After all, laboratory innovation is different from mass production. The official said. Super batteries are difficult to demonstrate their skills, and technological progress needs to be accumulated continuously. At this stage, we may have a strong desire for battery technology, so we feel that the development is relatively slow. Another auto industry employee said that the battery industry is currently in the process of quantitative change. In fact, news about various super batteries has appeared. This is true not only abroad, but also in China. As early as last year, a state-owned enterprise research institute in Zibo developed an asymmetric high-power rare earth capacitor battery. It is said that this kind of battery can run 800 kilometers once it is charged and tested. At present, buses using this battery can travel more than 300 kilometers at a time. According to the project leader, the manufacturing cost of rare earth capacitor battery is only half of that of lithium ion battery, and it also has great advantages in economy and safety.

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