Chinese scientists have made new progress in lithium-sulfur battery research

Recently, Associate Professor Xie Keyu from Northwestern Polytechnical University School of Materials Science and Technology, Institute of Materials Science and Technology, Northwestern Polytechnical University, published a report titled "Ferroelectric-Enhanced Polysulfide Trapping for Lithium- Sulfur Battery Improvement "(Advanced Materials, 2016, DOI: 10.1002 / adma.201604724). Xie Ke to associate professor and his co-author innovatively proposed the use of "ferroelectric effect" to inhibit the shuttle effect of lithium-sulfur battery polysulfides, lithium-sulfur battery cycle stability improved to open up a new research direction. The work is definitely publishable since it opens a new direction for research in this area. I expect many researchers will plunge into this direction and eventually lead to the breakthrough in this area. " At the same time, the research results have also been repeatedly reported by professional research media such as MaterialsViews and X-MOL. The theoretical energy density of lithium-sulfur battery is up to 2600Wh / kg-1, which is one of the most promising new secondary batteries in the future. However, the intermediate product in the process of charging and discharging has certain solubility in the electrolyte, easily diffuses to the negative electrode, and reacts with the lithium metal to cause the loss of the positive active material and corrode the lithium negative electrode, which seriously affects the cycling stability of the battery, Become the most critical issue restricting its commercial application. The work draws on the latest research progress in the field of ferroelectric materials and photocatalysis. By simply adding the ferroelectric material BaTiO3 as an additive to the positive slurry, the spontaneous polarization property of the nano-BaTiO3 is used to adsorb the same intermediate product of polarity, which is remarkable Improve lithium-sulfur battery cycle stability. Compared with other ideas, this method is easy to operate and can be seamlessly connected to the current lithium battery electrode manufacturing process, suitable for industrial production. In recent years, Xie Ke to associate professors led its master's graduate students (Wei Wenfei, Yu Haoran, Zhang Kun, You You, the original Kay, etc.) around the new energy materials and devices to carry out systematic research work, published more than 10 papers, including Advanced Materials Advanced Materials, 2015,27,5936; Advanced Materials, 2016, DOI: 10.1002 / adma.201604724; Two papers with Northwestern Polytechnical University as the first unit and one communication unit, one article Cooperation and participation). This series of research work has also been funded by the National Natural Science Foundation of China and the Youth Fund. Xie Ke to associate professor where the nano-energy materials personnel special zone with the strong support of the school in 2014 June relying on the material college was established. The center is headed by Wei Bingqing, a professor in the "Thousand Talents Program" of the State, and chief scientist. Since the establishment of the SAR, it has made great achievements in scientific research. It has successively undertaken 12 national-level projects and has repeatedly held such high-level visits as Advanced Materials (Impact Factor 18.96), Progress in Materials Science (Impact Factor 27.417) and Chemical Society Reviews (Impact Factor 33.38) Published papers in horizontal journals.