Wei Xiang, Li Weihan, Shi Jin-an, Gu Lin, Yu Yan
Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Materials Science and Engineering, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China.
Beijing National Laboratory for Condensed Matter Physics, The Institute of Physics, Chinese Academy of Sciences , Beijing 100190, P. R. China.
ACS Appl Mater Interfaces. 2015 Dec 23;7(50):27804-9. doi: 10.1021/acsami.5b09062. Epub 2015 Dec 10.
Flexible and self-supported carbon-coated FeS on carbon cloth films (denoted as FeS@C/carbon cloth) is prepared by a facial hydrothermal method combined with a carbonization treatment. The FeS@C/carbon cloth could be directly used as electrodes for Li-ion batteries (LIBs) and sodium-ion batteries (NIBs). The synthetic effects of the structure, highly electron-conductive of carbon cloth, porous structure for electrolyte access, and uniform carbon shell on FeS surface to accommodate the volume change lead to improved cyclability and rate capability. For lithium storage, the FeS@C/carbon cloth electrode delivers a high discharge capacity of 420 mAh g(-1) even after 100 cycles at a current density of 0.15 C and 370 mAh g(-1)at a high current density of 7.5 C (1 C = 609 mA g(-1). When used for sodium storage, it keeps a reversible capacity of 365 mAh g(-1)after 100 cycles at 0.15 C. Similar process can be utilized for the formation of various cathode and anode composites on carbon cloth for flexible energy storage devices.
通过一种简便的水热法结合碳化处理，制备了碳布薄膜上的柔性自支撑碳包覆硫化亚铁（表示为FeS@C/碳布）。FeS@C/碳布可直接用作锂离子电池（LIBs）和钠离子电池（NIBs）的电极。碳布的结构、高电子导电性、用于电解质进入的多孔结构以及FeS表面均匀的碳壳以适应体积变化的综合作用，导致循环性能和倍率性能得到改善。对于锂存储，即使在0.15 C的电流密度下循环100次后，FeS@C/碳布电极仍具有420 mAh g(-1)的高放电容量，在7.5 C的高电流密度下（1 C = 609 mA g(-1)）为370 mAh g(-1)。当用于钠存储时，在0.15 C下循环100次后，它保持365 mAh g(-1)的可逆容量。类似的工艺可用于在碳布上形成各种用于柔性储能装置的阴极和阳极复合材料。
