According to foreign media reports, battery researchers have been experimenting with alternative materials to improve battery performance. A team from Stanford University and the SLAC National Accelerator Laboratory claims to have found a winner. It is reported that the team redesigned the current collector for lithium-ion batteries, which greatly reduced the weight of the battery, which not only improved efficiency but also enhanced fire resistance. < / P > < p > Lithium ion batteries are characterized by a pair of current collectors, which need to work with two electrodes of the device to distribute the current flowing in any direction. Today’s current collectors are usually made of copper or aluminum foil, which makes them one of the heaviest components in a battery, sometimes accounting for 50% of the total weight of the device. < / P > < p > therefore, manufacturing these components to reduce the weight of the battery itself will greatly improve the performance of the battery. This will allow them to store more energy per unit weight, thereby reducing the load on electric vehicles. < / P > < p > the previous solution to this problem was to adjust the current collector to make it more porous or thinner to reduce weight. But these lead to problems such as weak battery changes, chemical instability, or the need to add more electrolyte materials to make up for the problem, which results in higher battery costs. < / P > < p > now, research teams from Stanford University and SLAC National Accelerator Laboratory are experimenting with another material, a lightweight polymer called polyimide. The material was then combined with a flame retardant called triphenyl phosphate (TPP), and the researchers then coated both sides of the material with a very thin layer of copper. < / P > < p > this sandwich design reduces the weight of the current collector by 80% compared to a typical design. In terms of energy density, the team calculated that this could translate into a 16% to 26% gain. < / P > < p > subsequently, the team conducted a number of experiments to assess the flammability of batteries, as well as experiments that featured current collectors on the market today. When both devices are exposed to open fire, the design in use today will catch fire, but the new design did not attract attention and the fire went out in seconds. < / P > < p > at present, the current collector has applied for a patent, and the researchers hope to incorporate it into the design of the next generation battery through cooperation with battery manufacturers. According to Yi Cui, the lead researcher, the collector is relatively easy to produce and low cost, so it should be very feasible to expand it to commercial production. After 12 years, “world class Super project” Shantou Bay Tunnel ushers in a historic breakthrough today