李彦光教授课题组与美国阿贡国家实验室Dr. Jun Lu合作在P. Natl. Acad. Sci. 上发表论文

题目：

Amorphous MoS₃ as the Sulfur-Equivalent Cathode Material for Room-Temperature Li-S and Na-S Batteries

作者：

Hualin Ye,^e,1 Lu Ma,^e,2 Yu Zhou,¹ Lu Wang,¹ Na Han,¹ Feipeng Zhao,¹ Jun Deng,¹ Tianpin Wu,²   Yanguang Li^*,1 and Jun Lu^*,2

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nanoscience and Technology, Soochow University, 199 Ren-AiRoad, Suzhou 215123, China.

²Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL 60439.

^ethese authors contribute equally

摘要：

Many problems associated with Li–S and Na–S batteries essentially root in the generation of their soluble polysulfide intermediates. While conventional wisdom mainly focuses on trapping polysulfides at the cathode using various functional materials, few strategies are available at present to fully resolve or circumvent this long-standing issue. In this study, we propose the concept of sulfur-equivalent cathode materials, and demonstrate the great potential of amorphous MoS₃ as such a material for room-temperature Li–S and Na–S batteries. In Li–S batteries, MoS₃ exhibits sulfur-like behavior with large reversible specific capacity, excellent cycle life, and the possibility to achieve high areal capacity. Most remarkably, it is also fully cyclable in the carbonate electrolyte under a relatively high temperature of 55 °C. MoS₃ can also be used as the cathode material of even more challenging Na–S batteries to enable decent capacity and good cycle life. Operando X-ray absorption spectroscopy (XAS) experiments are carried out to track the structural evolution of MoS₃. It largely preserves its chain-like structure during repetitive battery cycling without generating any free polysulfide   intermediates.

影响因子：

9.661

分区情况：

一区

链接：

http://www.pnas.org/content/114/50/13091