Zhe Xiao, Xiangyu Dai, Dongting Jiang, Honggui Xie, Xueping Liu, Mingli Wu, Dongming Liu, Yun Li, Zhengfang Qian, Renheng Wang

3D Nanocellulose Matrix Enhancing the Lithiation Dynamics of FePS3 Anode

  • Electrochemistry
  • Condensed Matter Physics
  • Biomaterials
  • Electronic, Optical and Magnetic Materials
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Abstract2D layered FePS3 is an anode material with high energy density for lithium‐ion batteries. Here, a simple and effective vacuum filtration method is used to successfully synthesize nanocellulose (NC) and FePS3 into a FePS3‐NC electrode with a 3D network structure. Based on the detailed structural characterization, electrochemical testing, and density functional theory, the relationship between NC and FePS3 materials in the lithium storage process is established from the perspective of lithium ions dynamics. The results display that NC can effectively decrease the adsorption energy of FePS3 materials, promote the construction of a 3D network structure, and form flexible FePS3‐NC electrodes. In addition, the migration path of lithium ions in the FePS3‐NC system is more inclined to the Y‐axis, and the migration barrier is also significantly reduced from 0.7714 to 0.4245 eV, which significantly improves the migration speed of lithium ions and the battery capacity. Therefore, the results of this study are conducive to further understand the dynamic mechanism of NC promoting rapid lithium storage in FePS3 materials and can provide good guidance for the study of flexible electrodes.

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