Open AccessEffects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn 2 O 4 cathode materials
Author(s) -
Zeng Xiaoxiong,
Wu Jinghe,
Hu Qishan
Publication year - 2016
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2016.0445
Subject(s) - spinel , electrochemistry , materials science , scanning electron microscope , chlorine , doping , magnesium , cathode , lithium (medication) , battery (electricity) , chemical engineering , inorganic chemistry , analytical chemistry (journal) , metallurgy , electrode , chemistry , composite material , environmental chemistry , optoelectronics , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
The lithium‐ion battery cathode materials spinel LiMn 2 O 4 and LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 samples are synthesised by solid state reaction route, the effects of magnesium and chlorine co‐doping on the structure, morphology and electrochemical performance of material LiMn 2 O 4 are studied by X‐ray diffraction, scanning electron microscope, electron diffraction spectroscope and galvanostatic charge–discharge, respectively. The results indicate that appropriate amount doping of magnesium and chlorine does not change the spinel structure of LiMn 2 O 4 , and the results reveal that the LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 has an initial discharge capacity of 125.2 mAh/g at 0.2C, and the capacity retention is still as high as 89.3% even after 100 cycles, which is significantly higher than 79.6% of LiMn 2 O 4 . Especially, the LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 shows the discharge capacity of 91.2 mAh/g at 10C, which higher than that of LiMn 2 O 4 (64.3 mAh/g). The LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 exhibits excellent cycling performance and rate capability than that of LiMn 2 O 4 . Thus, this is a very effective way for comprehensive improving LiMn 2 O 4 electrochemical performance.