R
Rosa M. Rojas
Researcher at Spanish National Research Council
Publications - 65
Citations - 1797
Rosa M. Rojas is an academic researcher from Spanish National Research Council. The author has contributed to research in topics: Powder diffraction & Spinel. The author has an hindex of 25, co-authored 64 publications receiving 1694 citations.
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Chromium doping as a new approach to improve the cycling performance at high temperature of 5 V LiNi0.5Mn1.5O4-based positive electrode
TL;DR: LiCr 2 Y Ni 0.5− Y Mn 1.5 O 5 -based cathodes with excellent cycling performances at high temperature were obtained by heating the as-prepared samples at 700 and 900°C for 1.h as discussed by the authors.
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High temperature co-doped LiMn2O4-based spinels. Structural, electrical, and electrochemical characterization
Sankar Mandal,Rosa M. Rojas,José Manuel Amarilla,P. Calle,Nina V. Kosova,V. F. Anufrienko,J. M. Rojo +6 more
TL;DR: In this article, high-temperature cubic spinels were obtained by thermal treatment at 1100 °C of the corresponding LiCoyMn2-yO4 (0 ≤ y ≤ 1) spinels.
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Synthesizing nanocrystalline LiMn2O4 by a combustion route
Daniela Kovacheva,Hristo Gadjov,K. Petrov,Sankar Mandal,Monica G. Lazarraga,Laura Pascual,J. Manuel Amarilla,Rosa M. Rojas,Pilar Herrero,José M. Rojo +9 more
TL;DR: In this paper, the effect of fuel content on the purity and morphology of nanocrystalline samples of lithium manganese oxide with cubic spinel structure has been analyzed by combustion of reaction mixtures containing Li(I) and Mn(II) nitrates that operate as oxidisers and sucrose that acts as fuel.
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Preparation and characterization of spinel-type Mn–Ni–Co–O negative temperature coefficient ceramic thermistors
TL;DR: In this article, ternary Mn-Ni-Co oxide negative temperature coefficient thermistors were synthesized by a low-temperature alternative route, without the addition of any binder, at relatively moderate temperature (≈1000 °C).
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Microstructural characterization of nanocrystals of ZnO and CuO obtained from basic salts
TL;DR: In this paper, X-ray powder diffraction was carried out using the Rietveld method and convolutive Xray line broadening analysis, which indicated very small crystallite sizes.