无机材料学报2018，Vol.33Issue(5)：494-500,7.DOI:10.15541/jim20170326
锑硅纳米复合薄膜作为钠离子电池负极材料的电化学行为研究
Electrochemical Behavior of Sb-Si Nanocomposite Thin Films as Anode Materials for Sodium-ion Batteries
摘要
Abstract
Recent years, alloy attracted significant research interest as anode materials for room temperature sodium-ion batteries, due to its high specific capacity and low cost. Among them, the study of Si-based alloy anodes are very lim-ited, owing to the low electrochemical reactivity of Si with Na ions. In this study, Sb-Si nanocomposite thin films were successfully prepared by pulsed laser deposition. Their electrochemical performance and reaction mechanism were studied as new anode materials for sodium ion batteries. They exhibited a reversible specific capacity of about 0.011 mAh/cm2(corresponding to 270 mAh/g) over 100 cycles at a rate of 10 μA/cm2, which is much higher than those for pure Si or Sb thin films prepared under the same condition. The investigation of electrochemical reaction mechanism reveals that Na3Sb and NaSi nanocrystallines are formed after discharge, due to the alloying reaction be-tween the Sb-Si films and Na. During the recharge process, Na3Sb and NaSi phases both decompose and form Sb and Si nanocrystallines again, respectively. It is proposed that heterogeneous grain boundaries existing in the Sb-Si nano-composite thin films are benefical to Na-ion transportation, thus enhance the electrochemical performance of the nanocomposite thin film electrode.关键词
钠离子电池/负极材料/锑硅复合材料/薄膜/脉冲激光沉积Key words
sodium-ion battery/anode material/Sb-Si nanocomposite/thin film/pulsed laser deposition分类
化学化工引用本文复制引用
肖娜,潘洋,宋云,吴晓京,傅正文,周永宁..锑硅纳米复合薄膜作为钠离子电池负极材料的电化学行为研究[J].无机材料学报,2018,33(5):494-500,7.基金项目
国家自然科学基金(51502039)National Natural Science Foundation of China(51502039) （51502039）
