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作者:

Zhao, Yujuan (Zhao, Yujuan.) | Lv, Zhi (Lv, Zhi.) | Wang, Yang (Wang, Yang.) | Xu, Tao (Xu, Tao.)

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EI Scopus SCIE

摘要:

The polypyrrole (PPy) nanowires are conducting 1D materials, which can significantly improve the electrical conductivity of the composites. A novel Li1.26Fe0.22Mn0.52O2 (LFMO) @ PPy nanowire composites were synthesized by simply ultrasonic dispersing LFMO and PPy nanowires in aqueous ethanol. The structure and morphology of pristine LFMO and LFMO@PPy are investigated by XRD, SEM, and TEM. The elemental mapping and FTIR results demonstrate the conductive network of PPy nanowires exists in the composites and the LFMO particles uniformly distribute on the PPy nanowires. LFMO combined with PPy nanowires exhibits better rate capability, higher capacity, coulombic efficiency, and cycleability than the pristine. The rate performance of composites with 10 wt% PPy nanowires shows the discharge capacities of 132.2 mAh/g and 98 mAh/g at 1C and 3C rate after 50 cycles, respectively. Electrochemical impedance spectroscopy test suggests that the conductive PPy nanowires can significantly decrease the charge-transfer resistance of LFMO. The composite with 10 wt% PPy nanowires shows a discharge capacity retention of 71% after 50 cycles at 1C, while the pristine sample only has 50% capacity retention.

关键词:

Fe-Mn based cathode material Polypyrrole nanowires Rate capability Electrochemical performance

作者机构:

  • [ 1 ] [Zhao, Yujuan]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 2 ] [Lv, Zhi]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Yang]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 4 ] [Xu, Tao]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China
  • [ 5 ] [Zhao, Yujuan]Beijing Univ Technol, Guyue New Mat Res Inst, Beijing 100124, Peoples R China
  • [ 6 ] [Zhao, Yujuan]Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing, Peoples R China

通讯作者信息:

  • [Zhao, Yujuan]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing Key Lab Green Catalysis & Separat, Beijing 100124, Peoples R China;;[Zhao, Yujuan]Beijing Univ Technol, Guyue New Mat Res Inst, Beijing 100124, Peoples R China;;[Zhao, Yujuan]Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing, Peoples R China

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来源 :

IONICS

ISSN: 0947-7047

年份: 2018

期: 1

卷: 24

页码: 51-60

2 . 8 0 0

JCR@2022

ESI学科: PHYSICS;

ESI高被引阀值:145

JCR分区:3

被引次数:

WoS核心集被引频次: 6

SCOPUS被引频次: 7

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

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