On the use of guanidine hydrochloride soft template in the synthesis of Na2/3Ni1/3Mn2/3O2 cathodes for sodium-ion batteries

Autor(es)

Aragon, M. J. ^[1] ; Ortiz, G. F. ^[1] ; Lavela, P. ^[1] ; Tirado, J. L. ^[1] ; Oliveira, J. D. C. ^[2] ; Motta, F. V. ^[2] ; Bomio, M. R. D. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Cordoba, Inst Univ Quim Fina & Nanoquim, Dept Quim Inorgan & Ingn Quim, Edificio Marie Curie, Campus Rabanales, E-14071 Cordoba - Spain

^[2] Univ Fed Rio Grande do Norte, Dept Mat Engn, LSQM Lab Chem Synth Mat, POB 1524, BR-59078900 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 789, p. 1035-1045, JUN 15 2019.
• Citações Web of Science: 0

Resumo

Several P2-Na2/3Ni1/3Mn2/3O2 layered oxides have been prepared by a modified synthesis procedure using guanidine hydrochloride as a soft template. X-ray diffraction patterns will reveal a decrease of both crystallite size and strain for guanidine hydrochloride treated samples, favoring sodium accessibility at the electrode/electrolyte interface. Also, guanidine hydrochloride promotes anisotropic particles for intermediate amounts. This specific morphology may contribute to a partial suppression of the P2-O2 phase transition. Galvanostatic tests at different rates and potential windows will evidence better capacity retention and low charge-discharge hysteresis for NaNMO-2% in close relationship with the low internal resistance values at the electrode-electrolyte interphase and apparent diffusion coefficients determined by impedance spectroscopy. A performing full sodium-ion cell will demonstrate the reliability of this material as an electrode for Na-ion cells. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 08/57872-1 - Instituto Nacional de Ciências dos Materiais em Nanotecnologia
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs