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Effect of sintering temperature on electrochemical performance of LiFe0·4Mn0·6PO4/C cathode materials

Version 2 2024-06-06, 10:10
Version 1 2015-03-10, 12:34
journal contribution
posted on 2024-06-06, 10:10 authored by YP Huang, X Li, Z Chen, Y Wu, Ying (Ian) ChenYing (Ian) Chen, CJ Kuang, SX Zhou
Carbon coated LiFe0·4Mn0·6PO4 (LiFe0·4Mn0·6PO4/C) was synthesised using high energy ball milling and annealing processes. The starting materials of Li2C2O4, FeC2O4.2H2O, MnC2O4.2H2O, NH4H2PO4 were firstly milled for 40 h, and followed by further milling for 5 h after adding glucose solution. The milled sample was heated at different temperatures (550, 600, 650 and 700°C) for 10 h to produce LiFe0·4Mn0·6PO4/C composites. The structure and morphology of the samples were investigated using X-ray diffraction, field emission scanning electron microscopy, and high resolution electron microscopy. The phase of samples annealed at 550 and 600°C mainly consists of olivine type LiFePO4, but a small amount of Fe2P impurity phase is formed in the samples annealed at 650 and 700°C. Electrochemical analysis results show that LiFe0·4Mn0·6PO4/C synthesised at 600°C exhibits the best performance with the initial discharge capacity of 128 mAh g-1 at 0·1 C, and 109 mAh g-1 at 1 C after 500 cycles. The LiFe0·4Mn0·6PO4/C exhibits excellent electrochemical properties for high energy density lithium ion batteries.

History

Journal

Materials Research Innovations

Volume

18

Pagination

S42-S45

Location

West Yorks, England

ISSN

1432-8917

eISSN

1433-075X

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2014, Maney Publishing

Publisher

Maney Publishing