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Tipo:	Artigo de Periódico
Título:	Microwave assisted ultra-fast method to synthesize carbonate-phosphates, Na3MCO3PO4 (M = Mn, Fe, Co, Ni) - relevant materials applied in sodium-ion batteries
Autor(es):	Demétrio Abreu Sena Costa Lorena Almeida Cadête Costa João Otávio de Sousa Mendes Wagner da Nova Mussel José Domingos Ardisson Luciano Andrey Montoro
Resumen:	Although largely used in mobiles and electric vehicles applications, insertion batteries based on Li-ion technology are high-cost devices. These applications require high-performance energy storage systems with high-energy and high-power densities, which are better attained by Li-ion technology. However, stationary applications such as power plants and uninterruptible power supplies (UPS) mainly require low-cost energy storage devices. In this scenario Na-ion insertion batteries feature as a cheaper option for such applications. Among the several compounds for use as cathode in Na-batteries, a largely studied class of compounds are the sodium-carbonate-phosphates, Na3MCO3PO4 (M = Mn, Fe, Co or Ni), with structure analogue to the mineral sidorenkite. In this work, it was developed a new microwave-assisted hydrothermal method as an ultra-fast way to prepare sodium-carbonate-phosphate compounds. This methodology results in high-quality materials with general formula Na3MCO3PO4 (M = Mn, Fe, Co or Ni) upon only 5 min processing time. Characterization techniques indicate highly ordered materials with sidorenkite-like phase and different morphologies or crystal habits, including plates, rods, and a ‘starfruit’ shape. As a proof-of-application the Mn-based material was evaluated from electrochemical tests for Na+ insertion reactions. The obtained results evidence initial discharge capacity of 107 mA h g-¹ with good reversible capacity (65 mA h g -¹) after several charge/discharge cycles.
Asunto:	Química analítica Físico-química Análise eletroquímica Baterias Minerais metálicos Compostos de sódio Rietveld, Método de Raios X - Difração Microscopia eletrônica de varredura Análise térmica Espectrometria de massa Termogravimetria Mossbauer, Espectroscopia de
Idioma:	eng
País:	Brasil
Editor:	Universidade Federal de Minas Gerais
Sigla da Institución:	UFMG
Departamento:	COLTEC - COLEGIO TECNICO ICX - DEPARTAMENTO DE QUÍMICA
Tipo de acceso:	Acesso Aberto
Identificador DOI:	http://dx.doi.org/10.21577/0103-5053.20190154
URI:	http://hdl.handle.net/1843/50606
Fecha del documento:	ene-2020
metadata.dc.url.externa:	https://jbcs.sbq.org.br/default.asp?ed=293
Aparece en las colecciones:	Artigo de Periódico

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