纳米棒
尖晶石
材料科学
锂(药物)
离子
化学工程
阴极
锂离子电池
电化学
电池(电)
晶格常数
纳米技术
无机化学
化学
物理化学
电极
冶金
衍射
有机化学
功率(物理)
光学
医学
内分泌学
量子力学
工程类
物理
作者
Do Kyung Kim,P. Muralidharan,Hyun‐Wook Lee,Riccardo Ruffο,Yuan Yang,Candace K. Chan,Hailin Peng,Robert A. Huggins,Yi Cui
出处
期刊:Nano Letters
[American Chemical Society]
日期:2008-10-01
卷期号:8 (11): 3948-3952
被引量:581
摘要
Spinel LiMn2O4 is a low-cost, environmentally friendly, and highly abundant material for Li-ion battery cathodes. Here, we report the hydrothermal synthesis of single-crystalline beta-MnO2 nanorods and their chemical conversion into free-standing single-crystalline LiMn2O4 nanorods using a simple solid-state reaction. The LiMn2O4 nanorods have an average diameter of 130 nm and length of 1.2 microm. Galvanostatic battery testing showed that LiMn2O4 nanorods have a high charge storage capacity at high power rates compared with commercially available powders. More than 85% of the initial charge storage capacity was maintained for over 100 cycles. The structural transformation studies showed that the Li ions intercalated into the cubic phase of the LiMn2O4 with a small change of lattice parameter, followed by the coexistence of two nearly identical cubic phases in the potential range of 3.5 to 4.3 V.
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