Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei 230026 (P. R. China) http://staff.ustc.edu.cn/∼yulab/
Angew Chem Int Ed Engl. 2014 Oct 20;53(43):11552-6. doi: 10.1002/anie.201407103. Epub 2014 Sep 11.
Traditional lithium-ion batteries that are based on layered Li intercalation electrode materials are limited by the intrinsically low theoretical capacities of both electrodes and cannot meet the increasing demand for energy. A facile route for the synthesis of a new type of composite nanofibers, namely carbon nanofibers decorated with molybdenum disulfide sheets (CNFs@MoS2), is now reported. A synergistic effect was observed for the two-component anode, triggering new electrochemical processes for lithium storage, with a persistent oxidation from Mo (or MoS2) to MoS3 in the repeated charge processes, leading to an ascending capacity upon cycling. The composite exhibits unprecedented electrochemical behavior with high specific capacity, good cycling stability, and superior high-rate capability, suggesting its potential application in high-energy lithium-ion batteries.
传统的基于层状 Li 嵌入电极材料的锂离子电池受到固有低理论容量的限制，无法满足日益增长的能量需求。现在报道了一种合成新型复合纳米纤维的简便方法，即碳纳米纤维上修饰二硫化钼片（CNFs@MoS2）。对于双组分阳极，观察到协同效应，引发了新的锂存储电化学过程，在反复的充电过程中 Mo（或 MoS2）持续氧化为 MoS3，导致循环时容量上升。该复合材料表现出前所未有的电化学行为，具有高比容量、良好的循环稳定性和卓越的高倍率性能，表明其在高能锂离子电池中有潜在的应用。
