Enhanced high temperature performance of LiMn2O4 coated with Li3BO3 solid electrolyte

Cathode material, LiMn 2 O 4 , was synthesized by solid-state reaction followed by surface coating of Li 3 BO 3 solid electrolyte. Structure and electrochemical performance of the prepared powders were characterized by X-ray diffraction, scanning electron microscopy, cyclic voltammetry, electrochemi...

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Veröffentlicht in:Bulletin of materials science 2013-08, Vol.36 (4), p.687-691
Hauptverfasser: JINLIAN, LIU, XIANMING, W U, SHANG, CHEN, JIANBEN, CHEN, ZEQIANG, HE
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container_issue 4
container_start_page 687
container_title Bulletin of materials science
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creator JINLIAN, LIU
XIANMING, W U
SHANG, CHEN
JIANBEN, CHEN
ZEQIANG, HE
description Cathode material, LiMn 2 O 4 , was synthesized by solid-state reaction followed by surface coating of Li 3 BO 3 solid electrolyte. Structure and electrochemical performance of the prepared powders were characterized by X-ray diffraction, scanning electron microscopy, cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge–discharge techniques, respectively. Results show that Li 3 BO 3 coated LiMn 2 O 4 has similar X-ray diffraction patterns as LiMn 2 O 4 . The discharge specific capacities of LiMn 2 O 4 coated with 0·1, 0·3 and 0·6 wt% Li 3 BO 3 are 123·3, 118·2 and 110 mAh/g, respectively, which is slightly smaller than that of 124·4 mAh/g for LiMn 2 O 4 . However, the capacity retention of Li 3 BO 3 coated LiMn 2 O 4 is at least 5·6 and 7·6% higher than LiMn 2 O 4 when cycled at room temperature and 55 °C, respectively. Li 3 BO 3 coated LiMn 2 O 4 shows much better cycling behaviours than LiMn 2 O 4 .
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subjects Chemical synthesis
Chemistry and Materials Science
Diffraction patterns
Discharge
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrode materials
Electrodes
Electrolytes
Engineering
Lithium
Lithium borates
Lithium manganese oxides
Materials Science
Protective coatings
Retention
Room temperature
Solid electrolytes
Spectrum analysis
Temperature
Thermal stability
Toxicity
X-ray diffraction
title Enhanced high temperature performance of LiMn2O4 coated with Li3BO3 solid electrolyte
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