Amorphous iron phosphate/carbonized polyaniline nanorods composite as cathode material in sodium-ion batteries

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• 作者：Yao Liu ; Yirong Zhou ; Shiming Zhang ; Junxi Zhang…
• 关键词：Iron phosphate/Ccarbonized polyaniline nanorods composite ; Carbonized polyaniline nanorods ; Iron phosphate ; Sodium ; ion battery
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：20
• 期：2
• 页码：479-487
• 全文大小：2,759 KB
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• 作者单位：Yao Liu (1)
  Yirong Zhou (1)
  Shiming Zhang (1) (2)
  Junxi Zhang (1)
  Ping Ren (1)
  Chao Qian (1)
  
  1. Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai, 200090, People’s Republic of China
  2. State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Analytical Chemistry
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  Condensed Matter
  Electronic and Computer Engineering
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1433-0768

文摘

As-prepared polyaniline (PANI) nanorods have been used to synthesize an iron phosphate/polyaniline (FePO₄/PANI) composition through the microemulsion technique. After sintering at 460 °C under a nitrogen protective atmosphere, the PANI carbonized, yielding the amorphous iron phosphate/carbonized polyaniline nanorods (FePO₄/CPNRs) composite, which acts as the cathode material in sodium-ion batteries (SIBs). The electrochemical performance of FePO₄/CPNRs composite shows an initial discharge specific capacity of 140.2 mAh g−1, with the discharge specific capacity being maintained at 134.4 mAh g−1 after the 120th cycle, up to 87.9 % of the theoretical capacity (154.1 mAh g−1 for NaFePO₄), as well as an excellent rate capability in sodium-ion batteries. Compared with pure FePO₄, the electrochemical performance has been greatly improved. On the one hand, using the CPNRs as conductive medium significantly improves electronic transport. On the other hand, the FePO₄ sphere of nanoscale particles, which has a large specific surface area, can promote an active material/electrolyte interface reaction and improve the speed of sodiation and desodiation during the charge and discharge process. The amorphous FePO₄/CPNRs composite shows outstanding electrochemical performance as competitive cathode material in SIBs. Keywords Iron phosphate/Ccarbonized polyaniline nanorods composite Carbonized polyaniline nanorods Iron phosphate Sodium-ion battery