Charging speed
A research team at the Ulsan Institute of Science and Technology in South Korea has developed a new type of lithium battery that charges 30 to 120 times faster than traditional lithium batteries. The team believes that it can be used to create a battery pack for electric vehicles, so that it takes less than a minute to fully charge the car.
Aqueous solution battery
On March 13, 2013, the latest issue of Nature magazine's subsidiary journal Sci. Report published a major research result of the research team of Fudan University Professor Wu Yuping. This latest research on aqueous lithium battery system can improve the performance of lithium batteries by 80%. Electric vehicles only need to charge for 10 seconds to travel 400 kilometers. This battery is low-cost, safe and not prone to explosion. '
Wu Yuping's research team showed this lithium battery system to reporters on the 13th. A thin piece of metallic lithium is tightly wrapped by a special composite membrane. When it is placed in a neutral pH aqueous solution and assembled with spinel lithium manganese oxide, a traditional positive electrode material in lithium-ion batteries, a new type of water lithium battery with an average charging voltage of 4.2V and a discharge voltage of 4.0V can be made. This achievement greatly breaks through the theoretical decomposition voltage of 1.23V of aqueous solution.
This achievement of Wu Yuping's research team provides the possibility of developing a new type of low-cost, easy to mass-produce, safe and environmentally friendly battery system. It is said that the new type of water lithium battery uses aqueous solution as electrolyte, which has enhanced flame retardancy, making the battery less likely to get hot during use and has high safety performance; the composite membrane made of polymer materials and inorganic materials can reduce the energy loss of the battery to less than 5%.
It is estimated that if this battery is used in mobile phones, the same size of battery can at least double the call time of the mobile phone, and the cost is less than half of the original; the same is true for cars, and the pollution to the environment is much less than that of existing lithium batteries.
Wu Yuping said that the US Energy Research Institute has "aimed" at this research and hopes to reach a cooperation intention with him. But he hopes to cooperate with forward-looking domestic enterprises. He said, "The new water-lithium battery can be applied to all aspects of life. I hope that the breakthrough of water-lithium battery can eventually make consumers feel assured of safety and accept the cost, and solve the current hesitant electric vehicle industry in the world."