In2S3 nanosheets anchored on N-doped carbon fibers for improved lithium storage performances
In2S3 nanosheets anchored on N-doped carbon fibers for improved lithium storage performances
复制标题
In2S3 纳米片固定在氮掺杂碳纤维上，可提高锂存储性能
DOI：
10.1016/j.ssi.2018.11.001
复制
发表时间：
2019-01-01
影响因子：
3.2
通讯作者：
Zhang, Jun
中科院分区：
文献类型：
--
作者：
Sun, Li;Liu, Xianghong;Zhang, Jun
金属硫化物是锂离子电池负极材料。然而，在放电/充电循环过程中的导电性差和巨大的体积变化严重限制了它们的潜在应用。采用水热法设计了In 2S 3 @ N-Carbon纤维上薄片结构，并用扫描电镜、X射线衍射和透射电镜等方法对材料进行了表征。当应用于LIB时，与原始In 2S 3相比，In 2S 3 @N-Carbon显示出更好的电化学性能。In 2S 3 @N-Carbon在0.1 A g（-1）下循环200次后保持485 mA h g（-1）的可逆容量，其显著高于纯In 2S 3的可逆容量（34.6 mA h g（-1））。In 2S 3 @N-Carbon纳米复合材料的电化学性能的提高归因于N掺杂的碳纤维，其提高了导电性并缓和了电极的体积膨胀。该研究为高性能负极材料的纳米结构设计提供了理论依据。
Metal sulfides are interesting materials for utilization as anodes in Li-ion Batteries (LIBs). However, the poor conductivity and huge volume change during the discharge/charge cycles severely limit their potential application. In the present work, a sheet-on-fiber structure of In2S3@N-doped carbon (In2S3@N-Carbon) is designed through a hydrothermal method, and the materials were characterized by methods of scanning electron microscopy, X-ray diffraction and transmission electron microscopy. When applied to LIBs, In2S3@N-Carbon shows better electrochemical performances in comparison to pristine In2S3. In2S3@N-Carbon retains a reversible capacity of 485 mA h g(-1) after 200 cycles at 0.1 A g(-1), which is significantly higher than that (34.6 mA h g(-1)) of pure In2S3. The enhanced electrochemical properties of In2S3@N-Carbon nanocomposite are attributed to the N-doped carbon fibers, which enhances the conductivity and relaxes the volume expansion of electrodes. This study provides a rational design of nanostructure for high-performance anode materials.