Important progress has been made in the research of high-performance AG13 battery

　　Recently, the research group of Professor Xu Maowen of the School of Materials and Energy of Southwest University has made important progress in the design and development of high-performance AG13 battery. The relevant research results were published in the international energy journal "Advanced Energy Materials" with the title "Double-Shelled NiO-NiCo2O4HeterostructureCarbonHollowNanocagesasAnEfficientSulfurHostforAdvancedLithium-SulfurBatteries", with an impact factor of 16.72. The school is the first completion unit of this achievement, master's students Hu Linyu and Dai Chunlong are the co-first authors of the paper, and Professor Xu Maowen is the corresponding author.

　　With the increasingly severe environmental problems and the rapid development of electronic and electric devices, it is imperative to design and develop efficient energy storage devices. AG13 battery are considered to be one of the most promising energy storage systems for the next generation due to their high energy density, high theoretical capacity, abundant sulfur cathode resources, low price and environmental friendliness. However, due to the poor conductivity of sulfur cathode materials and their discharge products, lithium sulfide, the volume effect during charging and discharging, and the "shuttle effect", the utilization rate of sulfur in the battery is low, the capacity decay is fast, and the rate performance is poor, which seriously hinders the commercialization of AG13 battery.

　　In response to these problems, Professor Xu Maowen's research group designed and synthesized double-layer core-shell NiO-NiCo2O4 heterojunction C hollow nanocages as sulfur carriers and applied them to AG13 battery for the first time. This hollow structure can not only provide sufficient space for sulfur storage, but also effectively deal with the volume effect during sulfur charging and discharging; in addition, NiO-NiCo2O4 heterojunction nanocages can take advantage of the unique advantages of their own composition, effectively inhibit the dissolution and diffusion of polysulfides and promote the kinetic process in their conversion reaction, alleviate the shuttle effect of the battery, and fully demonstrate the advantages of heterojunctions. Based on this unique design, the material, as the cathode of AG13 battery, exhibits high specific capacity and good cycle stability.

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