Southwest university professor Mao-wen Xu lithium-sulfur battery research discovers what progress has been made

Recently, southwest university of material and energy department professor mao-wen xu group in the design and development of high-performance lithium-sulfur battery Research on the important progress. Related research results to a "Double - Shelled NiO - NiCo2O4 Heterostructure Carbon Hollow Nanocages as An Efficient Sulfur Host for the Advanced Lithium-Sulfur Batteries" published in the international Energy top journals under the title, "the Advanced Energy Materials" (Advanced Energy Materials), the journal impact factor of 16.72. School for the results of the first complete unit, graduate Hu Linyu and generation of spring dragon to be a common, lead author of the paper, professor mao-wen xu for the corresponding author.

As the increasingly serious of environmental problems and the rapid development of electric and electronic equipment, design and development of efficient energy storage device is imperative. Lithium-sulfur batteries with high energy density, high theoretical capacity, sulfur, the positive characteristics such as rich resources, low cost and environmentally friendly, is considered to be one of the most promising energy storage systems of the next generation. However, because of the sulfur cathode materials and their discharge products lithium sulfide poor electrical conductivity, in the process of charging and discharging volume effect and the effect of "shuttle" problem, cause the low utilization rate of sulfur in the battery, capacity attenuation fast, ratio performance is poor, seriously hindered the commercialization process of lithium-sulfur batteries.

To solve these problems, professor mao-wen xu group design and synthesis of the double core-shell NiO - NiCo2O4 C hollow nano heterojunction cage as the carrier of sulfur, and used in the lithium battery for the first time. This kind of hollow structure cannot only provide enough space for storage of sulfur, but sulfur can also effectively cope with the volume effect in the process of charging and discharging. In addition, the NiO - NiCo2O4 heterojunction nanotubes of the cage can use their own unique advantages, effectively restrain disulfide dissolved spread and promote the process of, and the kinetics of the reaction, ease the shuttle effect of battery, fully embodies the advantages of heterojunction. Based on this kind of unique design, the material as lithium-sulfur battery anode showed higher specific capacity and good cycle stability.

The page contains the contents of the machine translation.