Synthesis and Lithium Storage Mechanism of Ultrafine MoO2 Nanorods
Synthesis and Lithium Storage Mechanism of Ultrafine MoO2 Nanorods
复制标题
超细MoO2纳米棒的合成及储锂机理
DOI：
10.1021/cm202459r
复制
发表时间：
2012-02-14
影响因子：
8.6
通讯作者：
Chen, Liquan
中科院分区：
文献类型：
--
作者：
Guo, Bingkun;Fang, Xiangpeng;Chen, Liquan
以介孔二氧化硅SBA-15为硬模板，采用纳米铸造法成功合成了直径约5 nm的超细MoO2纳米棒。该材料作为锂离子电池负极材料表现出高可逆容量、优异的循环性能和良好的倍率容量。超细MoO2纳米棒电化学储锂性能的显着增强归因于具有小直径的纳米棒结构和高效的一维电子传输路径。此外，还进行了密度泛函理论计算来阐明MoO2电极中Li的吸收/脱除机制，这可以帮助我们了解MoO2材料独特的循环行为。
Ultrafine MoO2 nanorods with a diameter of similar to 5 nm were successfully synthesized by a nanocasting method using mesoporous silica SBA-15 as hard template. This material demonstrates high reversible capacity, excellent cycling performance, and good rate capacity as an anode electrode material for Li ion batteries. The significant enhancement in the electrochemical Li storage performance in ultrafine MoO2 nanorods is attributed to the nanorod structure with small diameter and efficient one-dimensional electron transport pathways. Moreover, density functional theory calculations were performed to elucidate the Li uptake/removal mechanism in the MoO2 electrodes, which can help us understand the unique cycling behavior of MoO2 material.