JOURNAL ARTICLE

LiMn2O4CATHODE MATERIAL FOR LITHIUM ION BATTERIES

Saunak SenguptaR. R. RoyA. D. McLeanSujit Dasgupta

Year: 2006 Journal:   Canadian Metallurgical Quarterly Vol: 45 (3)Pages: 341-346   Publisher: Taylor & Francis

Abstract

A solution based method was used for the synthesis of lithium manganese oxide using polyvinyl alcohol (PVA) as a chelating agent. It was found from thermogravimetric analysis/differential scanning calorimetry (TGA/DSC) analysis that at about 220 °C, the synthesis reaction was completed. The precursor powders obtained were annealed between 250 and 600 °C from 2 to 8 hours to obtain pure spinel oxides. The morphology of the synthesized materials consisted of submicron sized particles agglomerated inside a network structure. At the discharge rate of 1 C, the highest discharge capacity obtained was 118 mAh/g; this was achieved with material annealed at 600 °C for 8 hours.On a utilisé une méthode à base de solution pour la synthèse de l’oxyde de manganèselithium en utilisant de l’alcool polyvinylique (PVA) comme agent complexant. À partir de l’analyse thermogravimétrique et de l’analyse calorimétrique à balayage différentiel (TGA/DSC), on a trouvé que la réaction de synthèse était complétée à environ 220 °C. Les poudres précurseurs obtenues ont été recuites entre 250 et 600 °C, de 2 à 8 heures, pour obtenir des oxydes de spinelle purs. La morphologie des matériaux synthétisés consistait en particules de taille submicronique agglomérées à l’intérieur d’une structure réticulaire. À l’intensité de décharge de 1 C, l’intensité la plus élevée obtenue pour le courant de décharge était de 118 mAh/g; on a obtenu cela avec le matériau recuit à 600 °C pendant 8 heures.

Keywords:
Thermogravimetric analysis Spinel Lithium (medication) Nuclear chemistry Differential scanning calorimetry Materials science Chemical engineering Chemistry Physical chemistry Physics Metallurgy Organic chemistry

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Topics

Advancements in Battery Materials
Physical Sciences →  Engineering →  Electrical and Electronic Engineering
Extraction and Separation Processes
Physical Sciences →  Engineering →  Mechanical Engineering
Advanced Battery Materials and Technologies
Physical Sciences →  Engineering →  Electrical and Electronic Engineering

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