Synthesis and Lithium Storage Mechanism of Ultrafine MoO2 Nanorods

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• 作者：Bingkun Guo ; Xiangpeng Fang ; Bin Li ; Yifeng Shi ; Chuying Ouyang ; Yong-Sheng Hu ; Zhaoxiang Wang ; Galen D. Stucky ; Liquan Chen
• 刊名：Chemistry of Materials
• 出版年：2012
• 出版时间：February 14, 2012
• 年：2012
• 卷：24
• 期：3
• 页码：457-463
• 全文大小：473K
• 年卷期：v.24,no.3(February 14, 2012)
• ISSN：1520-5002

文摘

Ultrafine MoO₂ nanorods with a diameter of 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.

Keywords:

molybdenum dioxide; nanorods; nanocasting; Li ion batteries