The new high-efficiency smart robot lithium battery can be charged in only three minutes!

According to the Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Tang Yongbing, a researcher at the Institute, and his research team's new low-cost, high-efficiency energy-storage intelligent robot lithium battery technology enables faster battery charging and significantly increases cycle life. In March of this year, the team released a new aluminum-graphite double-ion battery technology. The working principle of this technology is different from the existing traditional lithium battery, using cheap graphite as the positive electrode, aluminum foil as the negative electrode and current collector, and conventional Compared with lithium battery, the new battery technology has low cost, high working voltage, good safety, and high energy density. However, the application of the battery technology still needs to improve its cycle stability, and in particular, the volume change of the aluminum foil negative electrode during charge and discharge must be improved. problem.

“We have built a new type of carbon-coated porous aluminum composite negative electrode material through a simple and controllable method. Tests have shown that this new type of porous aluminum foil/carbon composite negative electrode can significantly improve the overall performance of aluminum-graphite dual-ion battery. In particular, it has greatly improved its cycle stability," said Tang Yongbing.

Through the cycle performance test, it is found that the capacity retention rate of the battery after high-rate charge-discharge cycles 1000 times is as high as 90%, which is much higher than the current national standard requirements for the cycle life of mobile phone batteries; when the power is fully charged within 3 minutes, its quality The energy density is as high as 197Wh, which is significantly higher than that of traditional lithium-ion batteries. The results will help promote the application of new aluminum-graphite dual-ion battery technology in new energy vehicles and portable electronic products.