Hydrothermal synthesis of o-LiMnO2 employing Mn mining residues from Amazon (Brazil) as starting material

Kamilla C. Mendes; Bruno A.M. Figueira; Thays C.C. Lavra; Oscar J.C. Fernandez; Pio Callejas Gómez; J.M. Rivas Mercury

Materials Letters: X (Jun 2019)

Hydrothermal synthesis of o-LiMnO2 employing Mn mining residues from Amazon (Brazil) as starting material

Kamilla C. Mendes,
Bruno A.M. Figueira,
Thays C.C. Lavra,
Oscar J.C. Fernandez,
Pio Callejas Gómez,
J.M. Rivas Mercury

Affiliations

Kamilla C. Mendes: Programa de Pós Graduação em Sociedade Ambiente e Qualidade de Vida, Universidade Federal do Oeste do Pará, Santarém 68040-255, Pará, Brazil
Bruno A.M. Figueira: Programa de Pós Graduação em Sociedade Ambiente e Qualidade de Vida, Universidade Federal do Oeste do Pará, Santarém 68040-255, Pará, Brazil; Corresponding author.
Thays C.C. Lavra: Programa de Pós Graduação em Engenharia de Materiais, Instituto Federal do Maranhão-IFMA, 65030-001 São Luis, MA, Brazil
Oscar J.C. Fernandez: Programa de Pós Graduação em Engenharia de Materiais, Instituto Federal do Pará-IFPA, 66093-020 Belém, PA, Brazil
Pio Callejas Gómez: Departamento FCyt Facultad de Ciencias y Tecnologia, Campus Universitario UMSS-Cochabamba, Bolivia
J.M. Rivas Mercury: Programa de Pós Graduação em Engenharia de Materiais, Instituto Federal do Maranhão-IFMA, 65030-001 São Luis, MA, Brazil

Journal volume & issue: Vol. 2

Abstract

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In this paper, the Mn mining residues from Amazon Region (Brazil) were proposed as low cost starting materials for synthesis of lithium manganese oxide. Thermal and hydrothermal treatments were used to convert the raw material into o-LiMnO2. The as-synthesized product was analyzed by means of X-ray diffraction (XRD), Infrared spectroscopy (IR), Raman spectroscopy (RS), Thermogravimetry (TG) and Differential thermal analysis (DTA). The results showed that o-LiMnO2 was synthesized at 170 °C for 3 days, having the average particle size (Scherrer equation) around 55 nm. The spectroscopy studies (IR and RS) showed bands at 600 and 613 cm−1. Above 430 °C, o-LiMnO2 converted into LiMn2O4 and LiMnO3. Keywords: Mn residues, Hydrothermal synthesis, o-LiMnO2, Characterization

Published in Materials Letters: X

ISSN: 2590-1508 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-letters-x

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