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Porous carbon-coated LiFePO4 nanocrystals prepared by in situ plasma-assisted pyrolysis as superior cathode materials for lithium ion batteries

  • Xiaoning Tian
  • Weiheng Chen
  • Zhongqing JiangEmail author
  • Zhong-Jie Jiang
Original Paper
  • 9 Downloads

Abstract

The porous carbon-coated LiFePO4 (LFP) nanocrystals synthesized by in situ plasma-assisted pyrolysis are reported. The particle size of LFP nanoparticles is well controlled through the coating of polyaniline (PANI) on FePO4. The effect of PANI content in FePO4/PANI on the morphology and electrochemical performance of LiFePO4 particles is extensively investigated. Results show that the optimized amount of PANI in FePO4/PANI is 10.16% and the corresponding carbon content in activated porous carbon-coated LiFePO4 (LFP/AC-P4) is 9.27%. The primary particle size of LFP/AC-P4 is 20~50 nm which are wrapped and connected homogeneously and loosely by activated porous carbon. The LFP/AC-P4 composite delivers a capacity of 166.9 mAh g−1 at 0.2 C, which is much higher than carbon-encapsulated LiFePO4 nanocomposite (LFP/C) synthesized without the assistance of plasma pyrolysis (163.5 mAh g−1). Even at high rate of 5 C, a specific capacity of 128.4 mAh g−1 is achievable with no obvious capacity fading after 250 cycles.

Keywords

In situ plasma assisted pyrolysis Porous carbon LiFePO4 Excellent rate capability Superior cyclic stability 

Notes

Funding information

Authors acknowledge the supports from the Chinese National Natural Science Foundation (No. 11105078), the Guangdong Provincial Natural Science Foundation (No. 2017A030313092), the Science Foundation of Zhejiang Sci-Tech University (No. 18062245-Y), the “Outstanding Talent and Team Plans Program” and “the Fundamental research funds for the central university” of South China University of Technology (No. 2018ZD25).

Supplementary material

11581_2019_3422_MOESM1_ESM.docx (13 kb)
ESM 1 (DOCX 13 kb)
11581_2019_3422_MOESM2_ESM.pdf (970 kb)
ESM 2 (PDF 969 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2020

Authors and Affiliations

  • Xiaoning Tian
    • 1
  • Weiheng Chen
    • 1
  • Zhongqing Jiang
    • 2
    Email author
  • Zhong-Jie Jiang
    • 3
    • 4
  1. 1.Department of Materials and Chemical EngineeringNingbo University of TechnologyNingboPeople’s Republic of China
  2. 2.Department of Physics, Key Laboratory of Optical Field Manipulation of Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhouPeople’s Republic of China
  3. 3.Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials, School of Environment and EnergySouth China University of TechnologyGuangzhouPeople’s Republic of China
  4. 4.Guangzhou Key Laboratory for Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and EnergySouth China University of TechnologyGuangzhouPeople’s Republic of China

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