Aluminum-air battery and metal fuel cell solve these four disadvantages

The development and application of new energy and new materials have always promoted the development of science and technology, thus promoting the progress of human society. With the popularization of electronic products and electric vehicles, various types of batteries have come into being. Recently, the news of an aluminum air battery caught the eye. The latest news comes from a research institute whose team has developed A-kilowatt aluminum-air Battery Power Generation System based on a graphene-based air cathode. They used graphene-based manganese oxide catalysts and a new graphene-based high-efficiency air cathode to increase the power density of the cell by 25% , greatly improving the overall performance of the metal-air battery. The energy density of the battery system is as high as 510 wh/kg, the capacity is 20 kwh, the output power is 1000W. The practical demonstration shows that the battery system can supply power to a TV set, a computer, an electric fan and 1060-watt lighting bulbs at the same time, is a major breakthrough in the field of new energy and new materials. Aluminum-air battery is essentially a fuel cell, which is a kind of chemical power that converts the Chemical Energy of metal materials directly into electrical energy. The aluminum air battery uses aluminum as the negative pole and oxygen as the positive pole in the single cell battery. It only consumes aluminum and a small amount of water when it works. It is a primary battery that can not be charged and requires replacement of aluminum electrodes to continue working. The theoretical amount of positive active material in such batteries is infinite, so the theoretical capacity of the battery depends mainly on the amount of negative metal, such batteries have a greater specific capacity. As a special fuel cell, al-air battery has great commercial potential in military, civil, underwater power system, backup power source of telecommunication system and portable power supply. The advantages and disadvantages of aluminum air battery, Aluminum Air Battery advantages: Specific Energy, aluminum air battery theory than energy up to 8100 wh/kg; light weight, the same energy of aluminum air battery mass is only 12% of Lead acid battery; non-toxic danger, can Be Recycled; rich in aluminum raw materials. The disadvantages of al-air batteries are also obvious: they are chemical reaction devices that release electrical energy, can not be recharged repeatedly, and require the replacement of aluminum electrodes to continue to work; The charging and discharging speed is slow, the voltage lags behind, the self-discharging rate is high, and the heat management system is needed to prevent the aluminum-air battery from overheating. Al-air battery and metal fuel cell solve these four disadvantages. The theoretical specific energy of al-air battery can reach 8100 wh/kg. The actual specific energy of al-air battery in 2014 is only 350 wh/kg, but it is also as powerful as lead acid batteries -- 7 heads, 8 times as powerful as nickel metal hydride batteries, and 2.3 times as powerful as lithium ion batteries. After the adoption of aluminum-air battery, the vehicle can obviously improve the driving range. According to foreign related information, California in the United States uses aluminum-air battery in electric vehicles, with a range of 1,600 km on a single aluminum electrode change. The traction power type Lead acid battery developed in China has a total energy of 13.5 kwh and a total mass of 375 kg. For the same energy, the total mass of the aluminum air battery is only 45 kg, or 12% of the mass of the Lead acid battery. As the battery mass is greatly reduced, the vehicle's fitting quality is also reduced, which can increase the vehicle's load energy or extend the driving range. Aluminum will not cause harm to the human body, can be recycled, does not pollute the environment. Aluminum is rich in raw materials, has a large-scale aluminum smelter, lower production costs. Aluminum recovery and regeneration is convenient and the cost of recovery and regeneration is low. And the aluminum electrode replacement method can be used to solve the problem of slow charging aluminum air battery. Although al-air battery contains high specific energy, its specific power is low, charging and discharging speed is slow, voltage lag, self-discharge rate is high, so heat management system is needed to prevent al-air battery from overheating. The new 100 kilogram aluminum air battery demonstrated by Alcoa Canada and Israeli company PHINERGY stores enough power to travel 3,000 kilometers. Cars with such batteries would still need to keep their lithium-ion batteries, and aluminum batteries would only start when their batteries ran out, so they could be used for a long time, during which time they would only need to be refilled with water each month. Usually in a year or so after reaching the use limit, to the service station to replace the new aluminum plate. Aluminum Air batteries have been developed for more than 70 years and are used primarily by the U.S. military and NASA. Aluminum Air batteries have been operating on Mars for 13 years and are still functioning normally.