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

✍ Scribed by Cheng, Fangyi; Wang, Hongbo; Zhu, Zhiqiang; Wang, Yan; Zhang, Tianran; Tao, Zhanliang; Chen, Jun

• Book ID: 120341508
• Publisher: Royal Society of Chemistry
• Year: 2011
• Tongue: English
• Weight: 633 KB
• Volume: 4
• Category: Article
• ISSN: 1754-5692
• DOI: 10.1039/C1EE01795K

✦ Synopsis

In this paper, we demonstrated the preparation and application of porous LiMn 2 O 4 nanorods as cathode materials for rechargeable lithium-ion batteries. Solid-state lithiation of porous Mn 2 O 3 nanorods, resulting from thermal decomposition of MnC 2 O 4 precursor, led to the formation of porous LiMn 2 O 4 nanorods with high crystallinity and phase purity. Without surface modification, the assynthesized porous nanorods exhibited superior high-rate capability and cyclability to the counterpart nonporous nanorods and nanoparticles. An initial discharge capacity of 105 mAh g À1 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.