China successfully developed a new type of aluminum-graphite double-ion battery

From the Institute of Advanced Technology of the Chinese Academy of Sciences, it was learned that the Institute's integrated functional film material research center has successfully developed a new type of aluminum-graphite double-ion battery that can significantly improve the performance of electric vehicles.

According to the introduction of the research center, this new type of AGDIB battery uses cheap and easily available graphite to replace the traditional high-cost lithium-containing transition metal oxides or lithium iron phosphate as the battery cathode material; aluminum foil is also used as a battery anode material and cathode Current collector; using conventional lithium salt and carbonate solvent as electrolyte. The working principle of the battery is different from the traditional lithium ion battery. During the charging process, anion intercalation reaction occurs in the positive electrode graphite, and aluminum-lithium alloy reaction occurs in the aluminum negative electrode, and the discharging process is the opposite. This new reaction mechanism not only significantly increases the battery operating voltage (3.8-4.6V), but also significantly reduces the battery's quality, volume, and manufacturing costs, thereby increasing the overall battery energy density.

The research center announced that it is estimated that the total battery mass energy density and volume energy density of this type of battery will be up to about 222 Wh/kg. The 500Kg AGDIB battery has a cruising range of approximately 550 kilometers. Compared with the traditional lithium battery technology, this kind of battery has obvious advantages. It not only reduces the production cost by about 40-50%, but also increases the energy density by at least 1.3-2.0 times. If this aluminum-graphite battery is successfully industrialized, it will significantly increase the performance of existing portable electronic devices, electric vehicles, and new energy storage systems. However, the current battery technology has yet to be optimized, such as the need to further improve the battery's cycle stability.

New aluminum-graphite double-ion battery structure and working principle

According to reports, this achievement was jointly developed by researcher Tang Yongbing and members of his research team Zhang Xiaolong and Zhang Fan. The related paper “A Novel Aluminum?Graphite Dual-Ion Battery” was published online at the top of the energy materials. The journal Advanced Energy Materials has applied for two PCT patents and one Chinese invention patent. The study was funded by the Guangdong Provincial Innovation Research Team, the Shenzhen Science and Technology Plan Project and the National Natural Science Foundation.