Design of cross-welded Na3V2(PO4)3/C nanofibrous mats and their application in sodium-ion batteries

• 作者: Chen Liu Zhao-Xi Zhag Rou Tan Ji-Wei Deng Qiu-Hong Li Xiao-Chuan Duan
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2022,（3）
• 所属期刊栏目: LETTERS
• 页码范围: 806-813
• 页数: 8页
• 语种: 英文

摘要

The rapid development of sodium-ion batteries(SIBs)requires the search for high-performance electrode mate-rials with high energy density.In this regard,free-standing electrode materials without additional conductive agents,adhesives and metal foil current collectors can effectively reduce the overall electrode mass,thereby increasing the energy density.Free-standing Na3V2(PO4)3/C(NVP/C)nanofibrous mats have been successfully fabricated through an ionic liquid-assisted electrospinning method followed by controllable sintering process.The good solubility of the ionic liquid precursor ensures the spinnability in the PAN-based electrospinning system,and a dense and continuous carbon layer is formed in situ on the surface of the NVP nanoparticles during the subsequent heat treatment process,which can effectively increase the electrons conductivity of the entire electrodes.