Congratulations to Dr. Shuping Li's paper being accepted by the international authoritative journal "ACS Applied Energy Materials"! The topic of the thesis is "High Performance Room Temperature Sodium-Sulfur Battery by Eutectic Acceleration in Tellurium-Doped Sulfurized Polyacrylonitrile".

Room temperature sodium-sulfur batteries have poor performance due to slow reaction kinetics and dissolution of polysulfides. Vulcanized polyacrylonitrile is a unique sulfur positive electrode that only involves S3-4 short-chain sulfur molecules and exerts a high specific capacity. Here, Te0.04S0.96@pPAN positive electrode is designed, 4mol% Te is used as eutectic promoter, which shows significantly enhanced reaction kinetics and promotes high sulfur utilization rate, as a high-performance RT Na-S battery positive electrode material. Te0.04S0.96@pPAN exhibits 1236 and 629 mA h g-1, 1111 and 601 mA h g-1 in carbonate and ether electrolytes at current densities of 0.1 and 6 A g-1. Specific capacity. In addition, UV-visible spectroscopy and shuttle current tests show that the dissolution of sodium polysulfide in ether electrolytes is significantly reduced, which is attributed to the acceleration of kinetics by Te doping. More importantly, spectroscopy and electrochemical analysis proved a two-step reaction pathway, in which Na2S3 and Na2S are the main intermediate products and final discharge products. This method provides a potential strategy for the practical application of RT Na-S batteries

https://pubs.acs.org.ccindex.cn/doi/10.1021/acsaem.9b00343