+Advanced Search
Preparation and Electrochemical Performance of Al-Ni Doped Modified LiMn2O4 Cathode Material
Author:
Affiliation:

1.Faculty of Environmental Science and Engineering, Kunming University of Science and Technology;2.School of Chemistry and Environment,Yunnan Minzu University;3.Faculty of Environmental Science and Engineering,Kunming University of Science and Technology

Clc Number:

TM912

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    The cathode material of single-crystal polyhedral LiAl0.08Ni0.03Mn1.89O4(LANMO) was rapidly synthesized by a solid-phase combustion method. The exposed surfaces of the single-crystal particles include {111}, {110} and {100} crystal faces. The results show that, LANMO material is a single-phase spinel structure, belonging to the space group Fd3m and exhibits a good crystallinity, the particle size is between 200 to 300 nm. The initial discharge specific capacity of LANMO is 110.6 and 96 mAh·g-1 at 1 C and 5 C, respectively, and the capacity retention rate reaches more than 70% after 1000 cycles. Under the elevated temperature (55 ℃) 1 C condition, the LANMO material also has an initial discharge specific capacity of 114.2 mAh·g-1, showing an excellent electrochemical performance. The kinetic performance test shows that the LANMO sample has a higher Li+ ion diffusion coefficient of 1.58×10-11 cm2 s-1 and a lower apparent activation energy of 23.89 kJ·mol-1. The Al-Ni synergistic modification improves the crystal structure stability of single crystal polyhedral spinel LiMn2O4 material, inhibits the Jahn-Teller effect effectively, reduces Mn dissolution, increases Li+ diffusion channels, Li+ diffusion rate and electrode reversibility as well as improves the rate performance and cycle life.

    Reference
    Related
    Cited by
Get Citation

[Guo Yujiao, Lu Yao, Ning Ping, Guo Junming. Preparation and Electrochemical Performance of Al-Ni Doped Modified LiMn2O4 Cathode Material[J]. Rare Metal Materials and Engineering,2021,50(12):4525~4533.]
DOI:10.12442/j. issn.1002-185X.20200990

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:December 22,2020
  • Revised:April 15,2021
  • Adopted:May 12,2021
  • Online: January 09,2022
  • Published: December 24,2021