Artículo
Small hollow nanostructures as a new morphology to improve stability of LiMn2O4cathodes in Li-ion batteries
Fecha de publicación:
10/2021
Editorial:
IOP Publishing
Revista:
Nanotechnology
ISSN:
0957-4484
e-ISSN:
1361-6528
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Spinel LiMn2O4 is a promising cathode material for lithium-ion batteries. However, bulk LiMn2O4 commonly suffers from capacity fading due to the dissolution of Mn into the electrolyte during cycling. Moreover, bulk LiMn2O4 exhibits a low Li+ diffusion coefficient that limits the volume available to Li+ storage. Herein, we report the synthesis of small hollow porous LiMn2O4 nanostructures with a mean size of 51 nm exhibiting exposed (111) planes, assembled by nanoparticles of about 6 nm in size. The morphological features of these nanostructures ensure a large contact area between the material and the electrolyte, shorten the pathways for Li+ diffusion and provide effective accommodation of the volume change during cycling. Therefore, these hollow nanostructures exhibit improved discharge capacity retention (nearly 82% after 200 cycles) and a greater Li+ diffusion coefficient (3.46 × 10-7 cm s-1) compared with that of bulk LiMn2O4.
Palabras clave:
HOLLOW NANOSTRUCTURES
,
LIMN2O4
,
LITHIUM-ION BATTERIES
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Licencia
Identificadores
Colecciones
Articulos (UE-INN - NODO BARILOCHE)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Citación
Rada Vilela, Evilus; Lima, Enio Junior; Ruiz, Fabricio Carlos; Moreno, Sergio; Small hollow nanostructures as a new morphology to improve stability of LiMn2O4cathodes in Li-ion batteries; IOP Publishing; Nanotechnology; 32; 43; 10-2021; 1-11
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