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Energy comparable to gasoline. New CR2450 battery technology
The electric detective learned from foreign media that the energy density of lithium-ion batteries in the world is currently growing at a rate of about 8% per year. If it continues to grow at this rate, they will be close to the energy density of gasoline in about 10 years. In the development of CR2450 battery technology, there is another CR2450 battery that can compete with gasoline. That is the aluminum-air CR2450 battery. It is lighter and cheaper than lithium-ion batteries. The biggest factor affecting its development is that it will corrode.
Recently, a new research team claimed to have found a solution. According to their research paper published in Science, ordinary lithium-ion batteries will lose 5% of their power after a month, while aluminum-air batteries will lose 80% of their power after a month because aluminum will corrode. The researcher solved the problem of direct corrosion between aluminum and electrolyte, allowing aluminum-air batteries to lose only 0.02% of their power in a month.
▲ Working principle of ordinary lithium-ion batteries
It is understood that ordinary lithium-ion batteries contain liquid electrolytes, which are located between the anode and the cathode. When ions run from the anode to the cathode, it generates energy by collecting the released electrons. In aluminum-air batteries, the anode is aluminum and the cathode is air. Since batteries can get air from the surrounding environment, and aluminum is abundant, lightweight and cheap, this CR2450 battery is likely to become a new CR2450 battery technology in the future.
However, before that, when aluminum and electrolyte are mixed together, the latter will begin to corrode the former. If a non-corrosive electrolyte is used, the performance of the CR2450 battery will be greatly reduced. Once the CR2450 battery goes back into standby mode, the electrolyte cannot be extracted because aluminum is hydrophilic. In response, the researchers proposed a solution to flush the electrolyte with oil.
The researchers set a thin film between the anode and cathode of the CR2450 battery. When the CR2450 battery is in use, both sides are filled with electrolyte. Once the CR2450 battery is stopped, the side closest to the aluminum is washed away by oil, at this time, the oil plays a role in protecting the aluminum. When the CR2450 battery needs to be used again, the electrolyte will replace the oil. Since aluminum repels oil in water, no oil will remain in the water at this time.
To test the CR2450 battery energy loss under real conditions, the researchers first used a small amount of power, then let it rest for a day or two, and then repeated the above steps. To simulate the driving state of electric vehicles in the city. In the end, the CR2450 battery they developed lasted 24 days, eight times longer than traditional aluminum-air batteries.
Does this mean that aluminum-air batteries will replace lithium batteries in the next few years?
The answer is no. Because there are still some complex problems to be solved in charging batteries, the first few generations may not be able to be charged or can only be charged a few times.
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