TU-TESL

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According to foreign media reports, researchers at the University of Wollongong in Australia have made a nano material that can act as a cathode for room temperature sodium sulfur, allowing sodium sulfur batteries to be used for large-scale energy storage. (photo source: University of Wollongong) room temperature sodium sulfur battery is very suitable for the new generation of energy storage applications, and the demand for the new generation of energy storage applications is growing. Room temperature sodium sulfur battery with high energy density and long cycle life will provide low-cost and competitive technology for large-scale fixed energy storage system, thus promoting the transformation to renewable energy society. However, the current room temperature sodium sulfur battery has the problems of fast capacity decay and low reversible capacity. Therefore, researchers have developed a nano material, which can overcome the above problems by implanting nickel sulfide nanocrystals into nitrogen doped porous carbon nanotubes, and the material has excellent performance when used as the cathode of sodium sulfur battery. Dr Yunxiao Wang, research director, said: "at present, the actual energy density of sodium sulfur battery is far from the theoretical value, and the practical application is mainly hindered by the sulfur cathode, because the sulfur cathode has insulation, slow oxidation-reduction reaction, dissolution and migration in the reaction process." Before the breakthrough, the research team used a variety of different materials for experiments, and this new nano material is not only superior in performance, but also suitable for large-scale production and commercialization. Dr. Zichao Yan said: "we have tried many carbon hosts, and finally found that the nitrogen doped porous carbon nanotubes implanted with nickel sulfide nanocrystals is a multifunctional sulfur host, and found that the carbon host chain in the host can provide a shorter ion diffusion path and a faster ion transfer speed. The results show that the Na-S battery has a longer cycle life, high performance and fast charge discharge The next step, the researchers say, is to expand the production of the material, push the sodium sulfur battery from the laboratory to the industry, and put the battery system into practical application.