Artigo Revisado por pares

Porous LiMn2O4 nanorods with durable high-rate capability for rechargeable Li-ion batteries

2011; Royal Society of Chemistry; Volume: 4; Issue: 9 Linguagem: Inglês

10.1039/c1ee01795k

ISSN

1754-5706

Autores

Fangyi Cheng, Hongbo Wang, Zhiqiang Zhu, Yan Wang, Tianran Zhang, Zhanliang Tao, Jun Chen,

Tópico(s)

Advanced Battery Materials and Technologies

Resumo

In this paper, we demonstrated the preparation and application of porous LiMn2O4 nanorods as cathode materials for rechargeable lithium-ion batteries. Solid-state lithiation of porous Mn2O3 nanorods, resulting from thermal decomposition of MnC2O4 precursor, led to the formation of porous LiMn2O4 nanorods with high crystallinity and phase purity. Without surface modification, the as-synthesized porous nanorods exhibited superior high-rate capability and cyclability to the counterpart nonporous nanorods and nanoparticles. An initial discharge capacity of 105 mAh g−1 could be delivered at 10 C rate, and capacity retention of about 90% was obtained after 500 cycles at this high rate. The durable high-rate capability was attributed to the unique porous one-dimensional (1D) nanostructure that gave rise to fast Li-intercalation kinetics and good structural stability for the spinel electrodes. The beneficial gains from 1D porous nanoarchitecture may enlighten the design and construction of new spinel-based electrode for high power applications.

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